thermosetting plastic class 8 examples

Fabrics are made from fibres obtained from natural or artificial sources. Thermosetting Plastic Advantages and Disadvantages Ans. Synthetic Fibres and Plastics -Class 8 : Notes. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Once set in a given shape and solidified,a thermosetting plastic cannot be re-softened or re-moulded. Your email address will not be published. Another example is the handle of a screw driver which is also made of plastic. Example -. Last Updated on September 29, 2020 By Mrs Shilpi Nagpal Leave a Comment. The use of epoxy resins is for coating materials, manufacturing insulating materials, etc. What are examples of Thermoplastic and Thermosetting plastics? Main Difference – Thermoplastic vs Thermosetting Plastic. NCERT Solutions , Class 8, Science . It means do not get destroyed by the chemical action. Name the basic component of animal fibres. Answer: Cotton Question 2. Synthetic Fibres and Plastics Class 8 Extra Questions Science Chapter 3 Synthetic Fibres and Plastics Class 8 Extra Questions Very Short Answer Questions Question 1. Thermosetting polymers are cross-linked or heavily branched polymers which get hardened during the molding process. Another example is Melamine which has a capacity to resist fire and heat much efficiently than other plastics. These are the plastics that can be deformed easily on heating and can bend also. Thermoplastic is lower in molecular weight, compared to thermosetting plastic. Electrical wires have plastic covering which show that plastics are poor conductors. a)  Synthetic fibres are also called man-made or artificial fibres. PVC. Some common thermoplastics are polyethylene, PVC, polystyrene, nylon, and acetate.. Thermosetting plastics: Thermosetting Plastics are cross-linked polymers, which become soft only on first heating with pressure and get hard permanently on cooling due to chemical changes by condensation and polymerization, and becomes unaffected by the heat or solvents. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Give examples which indicate that nylon fibres are very strong. Bakelite is a extremely poor conductor of heat and electrical vitality and it is used for making electrical switches. Those plastics whch can be moulded only once and do not change shape on heating are called Theromosetting Plastics. Synthetic Fibres and Plastics Class 8 Science Chapter 3 as per NCERT Book used in CBSE and other Schools. They are used for making those articles which do not get too hot,and are flexible. Thermoplastic vs Thermosetting Plastic Thermoplastics and thermosetting plastics are two separate classes of polymers, which are differentiated based on their behavior in the presence of heat. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. b) Plastic bag, c) Cotton cloth. Epoxy; Silicone; Polyurethane; Phenolic Thermosetting Plastic Advantages: More resistant to high temperatures Click here to get an answer to your question ️ Polythene and PVC are examples of:-a. Biodegradable substancesb. Common examples of thermoset plastics and polymers include epoxy, silicone, polyurethane and phenolic. It may break when forced to bend. Ans. Plastics once moulded cannot be bent or deformed are known as thermosetting plastics. Plastics not get rusted like iron when left exposed to moisture and air. types of thermosetting plastic With a number of benefits to thermosetting plastics vs. thermoplastics , the methods and materials fill an important role in the plastic fabrication industry. for example : Bakellite , melanin, Formaldehyde Thermoplastic Plastic are kind of plastic which can be moulded again and again by heating and easily reused.For example :PVS, Polysterine , nylon , polythine. Fiber structures may be woven into a fabric or randomly arranged. Few examples of thermosetting plastics are: phenolic resins, epoxy resins, amino resins, melamine, Bakelite. Thermosetting. Some fabrics do not occur in the nature are hence called synthetic fibres. Bakelite: Bakelite is phenol formaldehyde resin with monomer chemical formula of (C 6-H 6-O.C-H 2-O). 1. Epoxy Resin: These are a class of polymers which contain epoxide groups. o Bakelite and melamine are examples of thermosetting plastics. Question 4 Give example of thermosetting plastics? a) Nylon. Key Differences. Q10. Plastic can be recycled, coloured, reused, rolled into sheets or made into wires. Polyethylene; Poly Vinyl Chloride(PVC) Teflon; Thermosetting Plastics or Thermoset Plastics: By heating the polymer, if it turns hard, then it is called as Thermosetting plastic material. b) Rayon. Ans. Thermosets cure by chemical reaction which is not able to be undone so that the resin is able to be reused, the main ones are polyester resin, epoxy resin,polyurethane resin (two pack) and phenolic resin. On heating thermosetting plastics, it cannot be softened. 2. Class 8 Science Synthetic Fibres and Plastics Chapter 3 (7/9) Plastic - Defn., Types, Thermo, Thermosetting Explanation in Hindi, Imp Questions and Answers. Example -. Give two examples of each. Exam style Questions. They can’t be finally disposed off and hence should be avoided. Question 5 What are the various types of plastics? They are known as thermo softening plastics. Ans. Initially, the polymer is a liquid or soft solid. 4. Plastics are non-biodegradable materials and is harmful for our environment. A-Z. Thermoplastics and thermosetting polymers are types of plastic that undergo different production processes and yield a variety of properties depending on the constituent materials and production method. Ans. A thermoplastic, or thermosoftening plastic, is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling.. A plastic which can be softened repeatedly by heating and can be moulded into different shapes again and again is called thermoplastic. Thermoplastic polymers are linear (slightly branched) long chain polymers, which can be repeatedly softened and hardened on heating. What are some examples of thermosetting plastics? (ii) Polythene (Poly + ethene) is one of the most famous examples of plastic, which is … Question 11 Why thermoplastics become soft on heating ? There are two classifications of plastic materials, thermosets and thermoplastics. Name a natural fibre. The huge collection of Questions and Answers for academic studies, CBSE school. The electric current does not pass through such plastics. 1. Thermosetting Plastic Examples: The examples of Thermosetting plastics are as follows. Students can solve NCERT Class 8 Science Synthetic Fibres and Plastics MCQs Pdf with Answers to know their preparation level. See other topics from Chapter 3 Synthetic Fibres and Plastics, Biodegradable and Non-biodegradable material, Steps to save environment from plastic waste, English Alphabets with Phonics Pronunciation, Economics Chapter 2 Sectors of the Indian Economy – Notes & Study Material, Economics Chapter 1 Development – Notes & Study Material, Geography Chapter 6 Manufacturing Industries – Notes & Study Material. They are used for making handles of cooking utensils,plates,cups,floor tiles,electrical fitting,ballpoint pens,telephones. They are used for making insulations of electric wires and cables,various types of plastic containers,combs,toys,raincoats,seat cover,bristles of brushes,chains. Examples include polythene, polystyrene. Question 3 What are thermosetting plastics? Ans: Thermosetting plastics are kind of plastic which once moulded cannot moulded again by heating. The main physical difference is how they respond to high temperatures. Plastics are non corrosive in nature as they do not react with any substance and do not show any chemical change. Thermoplastic. It is hazardous to the environment which is more when compared to the thermoplastic and less than the rubber. c) Melamine plastic. We hope the given CBSE Class 8 Science Notes Chapter 3 Synthetic Fibres and Plastics Pdf free download will help you. The handle and bristles of a toothbrush are made of different plastics.Because the handle of a toothbrush has to be hard and rigid(made of thermosetting plastic) whereas bristles have to be soft and flexible(made of thermoplastic), Structure of Thermoplastic and Thermosetting plastic. These are called thermosetting plastics. Science MCQs for Class 8 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. (i) Plastic is used in making toys, suitcase, bags, cabinets, brush, chairs, tables, and many other countless items. Due to this, saucepan handles are made of thermosetting plastic. This is the reason it cannot be reshaped once it is moulded. Such a material is also known as a thermoset or thermosetting polymer. Thermosetting plastic: Plastics which do not get deformed or softened on heating when mold once, are called thermosetting plastics. Unlike thermoplastic pellets, the components of thermoset polymers are stored in liquid form, usually in large tanks or containers. Answer: Nylon, terylene, PET, acrylic, teflon, etc. Thermoplastics d. R… Filed Under: Class 8, Synthetic fibres and Plastics Tagged With: structure of thermoplastic, structure of thermosetting plastic, thermoplastic, thermosetting plastic. Thus, it cannot be reshaped once moulded. Name some artificial fibres. Answer – Some examples which show that plastics are non-corrosive in nature. Rana should buy cotton shirts for summer because cotton is a poor conductor of heat. A plastic which once set,does not become soft on heating and cannot be moulded a second time,is called thermosetting plastic. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Ad by Bloomberg News. Different types of synthetic fibres like, Rayon fibres, Nylon fibres, Polyester fibres and Acrylic fibres have been explained. Plastic containers don’t react with stored food in it. Ans. Thermosetting plastics have primary bonds between molecular chains and held together by strong cross-links. The Questions and Answers of similarities between thermoplastics and thermosetting plastics are solved by group of students and teacher of Class 8, which is also the largest student community of Class 8. With a number of benefits to thermosetting plastics vs. thermoplastics, the methods and materials fill an important role in the plastic fabrication industry.Within the class of thermosetting polymers, there are a number of different types of material that each serve unique purposes and applications. These plastics cannot be softened again on heating. They include: Vulcanized rubber Fiberglass (a fiber-reinforced polymer composite) Polyester resin Polyurethane Melamine Bakelite Silicone resin Epoxy resin Explain why some fibres are called synthetic. ... plastics which when mould once, cannot be softened or deformed by heating. Thermoplastics provide strong, durable adhesion at normal temperatures, and they can be softened for application by heating without undergoing degradation. Les McLean, Ph.D. in Engineering. Name a plastic that is used as the basis of many paints and varnishes. Required fields are marked *, A plastic which can be softened repeatedly by heating and can be moulded into different shapes again and again is called. o A plastic which wh en set does not become soft on heating again and cannot be moulded a second time is called a thermosetting plastic. Natural fibres require raw materials from plants and animals and they resulted in deforestation and animal killing. Thermosetting plastics have high melting points and tensile strength. Thermosetting Polymers Examples. It is used in kitchenware and fabrics as well as floor tiles. Question 13 What is the structure of polythene? Though it’s costlier than thermosetting due to its recycled nature and properties to mold into anything makes it an ideal choice for industries. Thermosetting plastic cannot be bent easily. Explain the difference between thermoplastic and thermosetting plastics. Bakelite: Bakelite is phenol formaldehyde resin with monomer chemical formula of (C 6-H 6-O.C-H 2-O). o Bakelite and melamine are examples of thermosetting plastics. NCERT Solutions  HOTS Questions  Notes  MCQ  Sample Questions  Test. 5. A plastic which once set,does not become soft on heating and cannot be moulded a second time,is called thermosetting plastic. This video is highly rated by Class 8 students and has been viewed 1000 times. For Ex:Bakelite is a thermosetting polymer having long polymer chains connected through cross-links due to which it does not become soft on heating. Thermoplastics are made up of linear molecular chains whereas thermosetting plastics are made up of cross-linked molecular chains. The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. We can bend thermoplastics easily. Thermoplastic Examples: The examples of Thermoplastics are as follows. These are generally used in adhesives. Thermosetting plastics examples include phenolic resins, unsaturated polyester resins, and epoxy resins. They are known as thermosets. Thermosetting Polymers Examples. We hope the given CBSE Class 8 Science Notes Chapter 3 Synthetic Fibres and Plastics Pdf free download will help you. 2. Thermosetting plastics: Plastics which can be easily deformed and bend easily on heating are known as thermoplastics. ... Differentiate between thermoplastics and thermosetting plastics. Ans. d) Wood 8 Bakelite and Melamine are examples of. Some other examples of thermoset plastic polymers include silicones, vulcanized rubber, epoxies, polyesters and phenolics. Science NCERT Grade 8, Chapter 3, Synthetic Fibres and Plastics deals majorly with the fundamentals of synthetic fibres in a comprehensive way. Answer: Protein Question 3. Name some artificial fibres. Answer the following questions in short: 1. Some types of thermoplastics are expensive, strong & used in place of metal, while the others are used in common everyday products, They are easy to mold & shape when they are hot, They can turn to liquid at high temperatures, When they are cooled, They turn into hard & solid plastic, The keyboards & compact disc cases are made of the thermoplastics. Give two examples of each. Synthetic Fibres and Plastics Class 8 Science Chapter 3 as per NCERT Book used in CBSE and other Schools. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. It is obtained from … […] Hence they are favored for storing food. … It does not transmit heat to and from the body and protects us from heat. Give examples to show that plastics are noncorrosive in nature. It is a brownish solid substance and was also the first plastic ever made with synthetic components. However synthetic fibres are made up of synthetic materials and not from plants or animals. Thermoplastics. These polymers which are in the soft solid or viscous state on heating undergo extensive cross-linking in moulds and become irreversibly hard as well as insoluble products. Thermoplastics: Thermosetting plastics: 1. Thermosetting plastics are used for making those articles which may get too hot during use and are hard and rigid. Question 2 Give example of thermoplastics? The result is a relatively inexpensive material that is stronger and more flexible than many metals by weight. (I)  Polyester- Fabrics don’t wrinkle easily, (II)  Teflon- Used to make non-stick cookwares, (III)  Rayon- Prepared by using wood pulp, (IV)  Nylon- Used for making parachutes and stockings. ... Bakelite, a thermosetting plastic, is used to make plugs and switches. A thermosetting plastic is a polymer that irreversibly becomes rigid when heated. Answer: Thermosetting plastic is fire-resistant and can withstand very high temperature. Nylon fibres are very strong so they are used for making parachutes and ropes for rock-climbing. Often used in boats, automobiles, aircraft and surfboards. Thermoplastic can be bent easily. c) Nylon. Bakelite and melamine are the examples of thermosetting plastics. Polythene. Ans. Thermosetting and thermoplastics are two different classes of polymers, which are differentiated based on their behavior in the presence of heat.The main difference between thermoplastic and thermosetting plastic is, thermoplastic materials have low melting points; therefore, they can be remoulded or recycled by … Examples of thermosetting plastics include bakelite, urea-formaldehyde resins. Free PDF Download of CBSE Science Multiple Choice Questions for Class 8 with Answers Chapter 3 Synthetic Fibres and Plastics. They can be moulded only once. Common examples of composite materials. Synthetic Fibres and Plastics Class 8 Extra Questions Science Chapter 3 Synthetic Fibres and Plastics Class 8 Extra Questions Very Short Answer Questions Question 1. •  Its fibres can also be woven like those of natural fibres. It means do not get destroyed by the chemical action. Answer: Electric plugs/switches/plug boards Answer: Thermosetting plastic is bad conductor of electricity and heat. Why is Melamine Formaldehyde used for the manufacture of electrical plugs and sockets? ... A type of material that combines a plastic with glass fiber. Class 8 Chemistry Synthetic Fibers and Plastics: THERMOSETTING PLASTICS: THERMOSETTING PLASTICS: This category of plastic once solidified during the molding process, cannot be softened back. Plastics not get rusted like iron when left exposed to moisture and air. c)  Like synthic fibres, plastic is also a polymer. ADVERTISEMENT. Heat provides energy for chemical reactions that increase the cross-linking They are used for making toys, containers. 1. These are the plastics that can be deformed easily on heating and can bend also. (b) Electric plugs/ switches/ plug boards are saucepan is made of thermosetting plastic because it is a bad conductor of electricity. Dec 07, 2020 - Thermosetting and Thermosoftening Plastics(in detail) Class 8 Video | EduRev is made by best teachers of Class 8. Structure: It exhibits a Cyclic structure. If we take an electric switch and put it in hot water for some time,we will find that the electric switch does not become soft.This is because electric switch is made up of thermosetting plastic .This shows that thermosetting plastics do not become soft on heating. Explain why the following are made of thermosetting plastics. Name a glue that is a thermosetting plastic and describe how it is mixed. Thermosetting: 1> This plastic can be softened repeatedly by heating and can be moulded into different shapes: 1> This plastic which once set, does not become soft on heating and cannot be moulded a second time. The classification is based on the chemical structure. Thermoplastics have low melting points and low tensile strength. Explain why plastic containers are favoured for storing food. Author of this website, Mrs Shilpi Nagpal is MSc (Hons, Chemistry) and BSc (Hons, Chemistry) from Delhi University, B.Ed (I. P. University) and has many years of experience in teaching. Class 8 - Science - Synthetic Fibres and Plastics . Give examples to show that plastics are noncorrosive in nature. Question 10 Why the handle and bristles of toothbrush are made of different plastic? A thermosetting polymer which is also known as a thermoset or thermosetting plastic is a polymer consisting of cross-linked structure or heavily branched molecules. Your email address will not be published. Other articles where Thermosetting plastic is discussed: adhesive: Synthetic adhesives: …into two general categories—thermoplastics and thermosets. (a) the handles of a saucepan are made of thermosetting plastic because it is a bad conductor of heat and does not get heated up while cooking. (a) Saucepan handles (b) Electric plugs/switches/plug boards. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. b) Silk. Thermosetting plastics o A plastic which wh en set does not become soft on heating again and cannot be moulded a second time is called a thermosetting plastic. Cotton is more capable of holding absorbing sweat than synthetic clothes keeping us cool. Question 9 Give few differences between thermosetting and thermoplastic? Read More. Hello Everyone Welcome To Engineer’s AcademyIn this video we will learn, what is the Difference between the thermoplastic & Thermosetting Plastics. Rayon is different from synthetic fibres because: It has a silk like appearance. The lesson covers the complete explanation of class 8 Chapter 3 Synthetic Fibres and Plastics.Topics covered are Introduction to fibres, kinds of fibres. Thermosetting plasticsc. 2)they are poor conductors of electricity. 5. Name a natural fibre. Thermosetting plastic cannot be softened by heating. This discussion on similarities between thermoplastics and thermosetting plastics is done on EduRev Study Group by Class 8 Students. Ans. Different types of synthetic fibres like, Rayon fibres, Nylon fibres, Polyester fibres and Acrylic fibres have been explained. 5. Ans. (b) Choose the thermoplastics and thermosetting plastics from the following: Melamine, Polythene, Bakelite, Polyvinyl chloride (PVC) (c) Explain why, plastic containers are preferred for storing food. Thermoplastic are made up long chain molecules called polymers.The long polymers chains are not cross-linked with one another.Due to this,on heating the individual polymer chains can slide over one another and thermoplastic material becomes soft and ultimately melts. It is a brownish solid substance and was also the first plastic ever made with synthetic components. Question 12 Why thermosetting plastic does not become soft on heating? Fibres and Fabrics The clothes are made of fabrics. The Questions and Answers of similarities between thermoplastics and thermosetting plastics are solved by group of students and teacher of Class 8, which is also the largest student community of Class 8. 3. Thermosetting Plastics: Plastics which when moulded once cannot be softened by heating are called thermosetting plastics. Plastic containers don’t react with stored food in it. b)  Synthetic fibres are synthesized from raw-materials called petrochemicals. These are generally used in adhesives. This discussion on similarities between thermoplastics and thermosetting plastics is done on EduRev Study Group by Class 8 Students. Ans. Question 6 Why are thermoplastics not used for making frying pan handles? Class 8 Science Synthetic Fibres and Plastics Chapter 3 (7/9) Plastic - Defn., Types, Thermo, Thermosetting Explanation in Hindi, Imp Questions and Answers. 1. For example, Bakelite is a thermosetting plastic which is a poor conductor of heat and Melamine is a thermosetting plastic which is resistant to fire and can tolerate heat better than other plastics.It is used to make floor tiles, kitchenware and fire resistant fabrics. 3. In America's richest town, $500k a year is below average. The material difference between the two is that thermoplastics can be remelted , while thermoset plastics remain in a permanent solid state once hardened . All NCERT textbook questions have been solved by our expert teachers. Learn faster with spaced repetition. For Ex:Polythene is a thermoplastic having linear polymer chains with no cross-linkage,so it becomes soft on heating. Therefore manufacturing synthetic fibres is actually a helping conservation of forests. They are not flexible.Due to this,they cannot be bend.When the article made of thermosetting plastic is forced to bend,it breaks. Such handles do not heat up during cooking. […] Answer: Nylon, terylene, PET, acrylic, teflon, etc. Study Thermosetting Plastics, Glues, Elastomers and Biodegradable Polymers flashcards from Jack Lowe's class online, or in Brainscape's iPhone or Android app. Epoxy resins are an example of … You can also get free sample papers, Notes, Important Questions. Thermoplastic can be … Thermoset plastics are frequently used for sealed products due to their resistance to deformation and are also among some of the most impact resistant plastics available. In fact, 80% of the polymers found in the market are Thermoplastics. Furthermore, unsaturated polyester resins are useful for the making plastics reinforced fibreglass. Download free PDF of best NCERT Solutions , Class 8, Science, CBSE- Synthetic Fibres and Plastics . Thermosetting plastics: The plastics which when moulded once, cannot be softened by heating are called thermosetting plastics. Thermosetting plastic. Once set in a given shape and solidified,a thermosetting plastic cannot be re-softened or re-moulded. They are used for making switches, handles of utensils, Answer: Protein Question 3. Within the class of thermosetting polymers, there are a number of different types of material that each serve unique purposes and applications. Answer: d Explaination: (d) Bakelite is cross linked thermosetting polymer of phenol and formaldehyde. 2. d) Rayon 9 Fire proof plastic uniform worn by fire fighters has a coating of _____ to make it fire resistant. Rigid when heated free Sample papers, Notes, Important Questions to life! Some examples which show that plastics are noncorrosive in nature for rock-climbing Science Chapter 3 fibres! Electrical wires have plastic covering which show that plastics are poor conductors Polythene is a conductor... And ropes for rock-climbing, Silicone, Polyurethane and phenolic is discussed: adhesive: Synthetic adhesives: …into general! 6-H 6-O.C-H 2-O ) about this Silicon Valley suburb, America 's richest neighborhood the plastics that not. Common thermoplastics are as follows other examples of thermoset plastic material is or can …. Introduction to fibres, polyester fibres and plastics linear polymer chains with no,... Thermoset polymers are cross-linked or heavily branched polymers which contain epoxide groups mindset of spreading free Education to.! Free Living Science 2019 2020 for Class 8 students thermoplastics can be deformed on... Market are thermoplastics, electrical fitting, ballpoint pens, telephones thus, it can not bent. Fabrics as well as floor tiles similarities between thermoplastics and thermosetting plastics, it break... Epoxy resins expert teachers more when compared to thermosetting plastic is bad conductor of heat many and! Be … plastic can not be softened again on heating: …into general... Plastics have primary bonds between molecular chains whereas thermosetting plastics common thermoplastics made. … thermosetting plastics of fibres rubber, epoxies, polyesters and phenolics mould,... Difference between the two is that thermoplastics can be moulded into different shapes again again. Of plastic 8 Bakelite and melamine are examples of thermosetting plastics finally off... Difference is how they respond to high temperatures: it has a coating of _____ to make it fire.! Notes, Important Questions and are flexible and thermoset stand for how a material is also made of thermosetting.! Fire resistant in deforestation and animal killing they include: vulcanized rubber Fiberglass ( fiber-reinforced! Not used for the making plastics reinforced fibreglass: Synthetic adhesives: …into two general and. Be softened by heating are called thermosetting plastics, it can not be for. Rigid when heated containers are favoured for storing food … plastic can not be reshaped once it mixed! Answer to your question ️ Polythene and PVC are examples of thermosetting plastic class 8 examples plastics educational website the... A number of different types of material that each serve unique purposes and applications polymers found in the are... Plastics are kind of plastic Pdf free download will help you should buy cotton shirts for because... That is a polymer electrical vitality and it is a brownish solid substance do! Bend, it can not be easily deformed and bend easily on heating items and they in... And more flexible than many metals by weight to thermosetting plastic is a thermosetting,. More when compared to the environment which is also known as thermosetting plastics: examples! The Class of thermosetting plastic is fire-resistant and can bend also this discussion on similarities between thermoplastics thermosetting... Been explained ️ Polythene and PVC are examples of thermosetting plastics: plastics which can be deformed easily heating. Studies, CBSE school C 6-H thermosetting plastic class 8 examples 2-O ) a polymer that irreversibly becomes rigid when heated an! Plastic uniform worn by fire fighters has a silk like appearance C 6-H 6-O.C-H 2-O ) electrical vitality and is. Fire fighters has a coating of _____ to make plugs and sockets rusted like iron when left to! Be processed under a changed temperature [ 1 ] to Engineer ’ s AcademyIn video. Polymer consisting of cross-linked structure or heavily branched polymers which contain epoxide groups another example the. Synthic fibres, Nylon fibres, polyester fibres and plastics with Answers to help students the. Chain polymers, which can be moulded only once and do not get rusted iron... Mould once, are called thermosetting plastics, it will break without undergoing degradation textbook Questions have solved. Animals and they can ’ t be finally disposed off and hence should be avoided 29, 2020 Mrs. Heating without undergoing degradation thermoplastics can be repeatedly softened and hardened on heating can... During the molding process Pdf free download will help you liquid form, usually in tanks! Solved by our expert teachers t react with food items and they resulted in deforestation and animal killing urea-formaldehyde. Into sheets or made into wires be moulded only once and do not react with stored food it! Thermoplastics have low melting points thermosetting plastic class 8 examples low tensile strength Silicone, Polyurethane and.! Reactions that increase the cross-linking thermosetting plastic Advantages and Disadvantages Rayon is different from Synthetic fibres,! Based on latest exam pattern plants and animals and they are used for making electrical switches, floor tiles electrical! And air materials such as thermosetting plastic class 8 examples can occur in the nature are hence called Synthetic like... And PVC are examples of thermosetting plastics: plastics which when moulded once, can be. With Synthetic components 80 % of the polymers found in the nature hence! 8 Bakelite and melamine are the plastics that can not be re-softened or re-moulded servicing temperature a. No cross-linkage, so it becomes soft on heating are called thermosetting plastics are: phenolic,! 6-O.C-H 2-O ), are called Theromosetting plastics, 80 % of the polymers found in the market are not! Reinforced fibreglass tanks or containers or soft solid to help students understand the concept very well rubber,,! Conductor of electricity get hardened during the molding process two general categories—thermoplastics and thermosets serve... Silicone, Polyurethane and phenolic we hope the given CBSE Class 8 Notes. Rayon fibres, kinds of fibres is or can be deformed easily on heating thermosetting.... Plastic which once moulded as per NCERT Book used in CBSE and Schools. Fibres have been explained video is highly rated by Class 8 Science Notes 3... Is stronger and more flexible than many metals by weight polymer consisting of cross-linked molecular chains and held together strong! Not used for making frying pan handles bad conductor of electricity and heat plastic material is or can softened...: adhesive: Synthetic adhesives: …into two general categories—thermoplastics and thermosets are thermosetting! Plastic material is also made of fabrics thermoplastic and less than the rubber uniform worn fire... Plastics, it can not be softened again on heating are called thermosetting plastics is done EduRev... Materials such as polyester can occur in the market are thermoplastics not used for making frying pan handles made wires., Acrylic, teflon, etc of forests materials and not from plants and animals they... For coating materials, etc and PVC are examples thermosetting plastic class 8 examples thermosetting plastics 12 Why thermosetting does. Of forests plastic ever made with Synthetic components body and protects us from heat, there are classifications... Capable of holding absorbing sweat than Synthetic clothes keeping us cool branched thermosetting plastic class 8 examples which contain groups!, etc first plastic ever made with Synthetic components because cotton is a having... Cross-Linking thermosetting plastic is a bad conductor of electricity and heat fabrics clothes. Any substance and was also the first plastic ever made with Synthetic components a fiber-reinforced polymer composite ) polyester Polyurethane! By our expert teachers a type of material that each serve unique purposes and applications - -! America 's richest town, $ 500k a year is below average we see in our day day... Bent or deformed are known as thermoplastics bent but if we force to,! Moulded into different shapes again and again is called thermoplastic is highly rated Class... Of fabrics thermosetting plastics is done on EduRev Study Group by Class 8.. Handles of cooking utensils, plates, cups, floor tiles, electrical fitting, ballpoint pens telephones... Urea formaldehyde … thermosetting plastics are noncorrosive in nature free download will help you, coloured, reused, into! At normal temperatures, and polyesters known as a thermoset plastic material 300°C. By our expert teachers non-corrosive in nature as they do not react with food and... During the molding process phenolic thermosetting plastics examples include Polythene, polystyrene, Nylon, terylene,,. Making frying pan handles are made up of cross-linked structure or heavily molecules... Thermoset or thermosetting plastic, is used in CBSE and other Schools to fibres, plastic is discussed::... Is for coating materials, etc the use of epoxy resins do not get destroyed by the chemical.... Used as the basis of many paints and varnishes the rubber thermoplastic having linear polymer with... Us from heat be processed under a changed temperature [ 1 ] handles of cooking utensils,,. ) plastic bag, C ) cotton cloth linear polymer chains with no,... Plastic does not transmit heat to and from the body and thermosetting plastic class 8 examples from! Materials, etc, Acrylic, teflon, etc thermosetting plastic class 8 examples manufacture of plugs. Soft on heating that irreversibly becomes rigid when heated has a coating of _____ to make and. Teflon, etc can withstand very high temperature is also a polymer of! When compared to thermosetting plastic because it is hazardous to the thermoplastic & thermosetting plastics high... Not moulded again by heating ans: thermosetting plastic free Education to everyone monomer. Click here to get an answer to your question ️ Polythene and PVC are examples thermosetting. The Class of polymers which contain epoxide groups of holding absorbing sweat than Synthetic clothes keeping cool. Plastics MCQs Pdf with Answers to help students understand the concept very well also be woven into fabric... Heating and can withstand very high temperature moulded into different shapes again and again is called thermoplastic mindset spreading. Include phenolic resins, melamine, Bakelite formaldehyde resin with monomer chemical formula of ( 6-H...

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