Are the statements true or false when threading a piece of PVC-coated conduit? Examples are bakelite and melamine. Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst.Heat is not necessarily to be applied externally. True False QUESTION 4 This process pushes material through a die to form a long contiuous shape. Can you write the major difference between these two types of plastics? The main physical difference is how they respond to high temperatures. Polymers are This quiz is incomplete! About 16% of these are plastic injection machines, 3% are moulds, and 1% are plastic extruders. Which of the following is a thermosetting plastic: (a) PVC (b) nylon (c) teflon (d) bakelite. In summary, thermo-softening plastics are soft and melt when heated, whereas thermosetting plastics are hard and do not soften or change their shape when heated. 3) Epoxy resin is a thermoplastic? PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Acrylic is an artificial wool. In ideal situations, thermoplastics can be repeatedly melted and remolded into new products. False EPDM is a thermosetting plastic. Synthetic True or False State whether the given statements are true or false. All the synthetic fibres are prepared using raw materials of petroleum origin called.............. . This problem has been solved! B) True 14. T/F- PVC fittings are made by the extrusion process in which plastic resins are heated, softened, and forced through a circular die, which forms the cylindrical pipe shape. It remains crisp, wrinkle free and easy to wash, so it is quite suitable for making dressing material. a. True. The melting point of PVC is normally 212 0 C. Glass transition temperature is about 81 0 C. Glass transition temperature is the temperature at which the polymer transits from a hard glassy state to a rubbery state upon the increasing of temperature. True. (b) Assertion is true, Reason is true; Reason is not a correct explanation for Assertion (c) Assertion is true, Reason is false (d) Assertion is false, Reason is true. Which plastic is used to laminate kitchen worktops? False EPDM is a thermosetting plastic. B. Polythene. A. Bitumen-treated fiberglass felt. Say TRUE or FALSE : Chloroprene is an addition polymer of Neoprene. Thermosetting Plastics:There are some plastics which when … (B) Melamine. Urea, Ammonia nitrate and ammonium sulphate are examples of: ... EPDM is a thermosetting plastic. True b. Name a synthetic fibre which is polyamide. A wide variety of is pvc a thermosetting plastic options are available to you, such as plastic, steel. True. Question. Answer: False. If you own a recently manufactured aquarium or terrarium, it’s likely made of acrylic plastic. A lot of plastic pollutes our environment. Explain the difference between thermoplastic and thermosetting plastics. Answer: (a) melamine Melamine is a thermosetting plastic. True Or False? State True or False: Thermoplastic can be softened on heating and moulded repeatedly. Give an example of linear and branched chain polymer each. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Question 12. Question 1. Question 13. Synthetic fibres are synthesised from raw material called …….... . 5. It was the first fully synthetic fibre. Rayon is the first man-made cellulose fibre. Examples of thermoset types include rubber insulations such as silicone rubbers and EVA (Ethylene-Vinyl Acetate). Polyethylene – Polyethylene is a very common thermoplastic, and is often used to create plastic grocery bags or single-use plastic products like shampoo or water bottles. False. a. Epoxy resin. Can you write the major difference between these two types of plastics? (D) None of these. b. 21. What is Acrylonitrile Butadiene Styrene (ABS)? PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Rayon is mixed with cotton to make bedsheets or mixed with wool to make carpets. If subjected to extremely high temperatures, the material may unwantedly soften, deform, and … Bakelite is obtained from phenol by reacting with (a) Vinyl chloride (b) Ethylene glycol (c) Ethanal (d) Methanal Answer: (d) Methanal. (a) Melamine (b) Polythene – (c) PVC (d) Nylon Answer. TRUE ? Nylon, rayon, acrylic, terene and polycot are synthetic fibres. They can be melted again and again. … Polythene, polystyrene, PVC, melamine and formica are plastics. On the opposite of that Thermosetting doesn't regain its shape after heating. Examples of thermoplastics include polythene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), nylons, etc. See the answer. Heat provides energy for chemical reactions that increase the cross-linking between polymer chains, curing the plastic. The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. Nylon was made in 1931. 3) Examples are polythene and polyvinyl chloride. True. 4) PVC is a thermoplastic. a. Thermoplastics are known for their high molecular weight because intermolecular interactions increase as the plastic is cooled. a. Pencil or bevel cut the PVC coating at the end of the conduit. Vinyl plastic and PVC are often the same thing. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. False. Plastics are produced by condensation and addition polymerization reactions. (D) examples of heavy fibers. PE and PVC may also be cross-linked making them thermosetting types. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Answer. Question 20. a. The lap seams in an EPDM roof membrane are typically sealed by. Some other examples of thermosetting polymers include a substance used to make old TV sets and certain types of strong glue. What is High Density Polyethylene (HDPE)? For Any Sample Of Plastic, It Is Generally Too Costly To Count The Number Of Repeating Units On Each Of The Polymer Chains. Heat is not necessarily to be applied externally. ? 6. a. Play this game to review Chemistry. (a) melamine (b) teflon (c) polythene (d) PVC. 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. Can you write the major difference between these two types of plastics? If re-heated they cannot soften as polymer chains are interlinked. 4 Which is a thermosetting plastic? ? False » Questions » Engineering » Civil Engineering » Civil Engineering - Others » EPDM is a thermosetting plastic. Bakelite is poor conductor of electricity. True b. Which of the following does not have cross linked arrangement: (A) Bakelite. Question 4. Nylon is also used for making parachutes and ropes for rock climbing. False. less flexible but more fire resistant. Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. Polyester fibres are used for making hand knit sweaters. Synthetic fibres are also called ……... or …….. fibres. a. Play this game to review English. TRUE ? Solution: Bakelite is a thermosetting plastic, which means it retains its shape even at high temperatures. Examples of thermoplastics include polythene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), nylons, etc… Question 5. Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Instead, thermoplastic chains are held together by van der waal forces, weak attractions between molecules. It was prepared from coal water and air. Visually speaking, thermoplastic chains are clumped together like a ball of tangled yarn. False. Visually speaking, thermoplastic chains are clumped together like a ball of tangled yarn. 5) HDPE is a tough plastic used for making toys. Page No 44: Question 4: Which of the following is a thermosetting plastic? Question. ? A thermosetting polymer, resin, or plastic, often called a thermoset, is a polymer that is irreversibly hardened by curing from a soft solid or viscous liquid prepolymer or resin. What is the difference between thermoplastic and thermosetting plastics? b. Answer: True. Answer 2 Grind the PVC coating to 5 mil before treading. Many small units combine to form a large single unit called a ……... . Nylon was also known as artificial silk in China. Answer (b) non-corrosive Food items are stored in plastic containers because they are non-corrosive. Answer: Nylon. Telephone instruments, cooker handles, ball point pens, electrical switches. Basil Hamed. PVC (polyvinylchloride) -a cheaper plastic used for window frames and pipes. ... State whether the following statements are True or False: Question 1. Artificial silk is another name for silk. Answer: True. T/F- PVC fittings are made by the extrusion process in which plastic resins are heated, softened, and forced through a circular die, which forms the cylindrical pipe shape. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. False. Reason: In thermosetting plastics, the polymeric chains are held together by strong covalent bonds. 1 true 2 true 3 false ‐The plastic is solid. Plastics can be recycles, reused, colored melted, rolled into sheets or made into wires. True or false? False. Plastic Applications. Answer: Nylon. 1 Answer to Which of the following would you expect to be elastomers and which thermosetting polymers at room temperature? Sample Density B. thermosets, can be heated and mouldedlike thermoplastics. Thermoplastics are the polymers which loses their shape on heating and regain their shape on cooling. Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst. T/F- PVC Sch. Polyester is the strongest synthetic fibre. An excellent example is polyurethane foam. However, like any other material, thermoplastics have their limitations. Question. Question 5. Once formed, it can be heated and reformed over and over again FALSE; Epoxy resin is a thermoplastic? 21. Question 6. Rayon synthesised for the first time in England. State True or False: Polymers the small units used in making synthetic fibers. Thermoset plastics are often used for sealed products due to their resistance to deformation. Question 41. 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. Hence the given statement is false. Answer: Polymers are compounds that are made up of … They are used for electrical plugs and sockets. Question 2. When you heat thermoplastics, the molecules do not chemically bond with each other. A) False 13. Answer 21. PVC can be made either as a flexible plastic or a rigid plastic by means of additives. Examples – Polythene and polyvinyl chloride(PVC) Thermosetting PlasticThe plastic which getsmoulded once, cannot besoftened on heating is called thermosetting plastic. Assertion: Bakelite is a thermosetting plastic. (C) PVC. This makes thermosetting plastics ideal for producing heat resistant products such as insulation parts, car parts, etc. Why then is there concern today about their increasing use? It is used to make many items like socks, ropes, tents, toothbrushes, car seat belts, sleeping bags, curtains etc. Nylon was also known as artificial silk in China. Question 2. These are used for manufacturing toys, combs, cargrills and various types of containers. Examples of thermoplastic types are PVC (Polyvinyl Chloride) and PE (Polyethylene). Nylon is a thermoplastic polymer. Synthetic Fibres and Plastics Class 8 Extra Questions Short Answer Questions. Nylon fibres are strong elastic and light, lusturus and easy to wash. 2) Plastic is suitable for building large and heavy structures. 5. The raw material to make plastic is oil. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. b. cure. 6. false, false, true, true, true. Question 7. Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. (b) Write down the structure of monomer and… Initially, the polymer is a liquid or soft solid. Examples: Nylon, PVC, polystyrene, etc. Flexible polyurethane foams are commonly shredded into small flakes and re-manufactured into carpet underpayment. Separate polymers are joined in order to form a huge polymer. Like synthetic fibres, plastic is also a ........... Toys, carry bags, plastic bowls, electric wire. True b. Thermoplastics are 100% recyclable. plastic (polythene) 49. MINERALS AND THEIR SIGNIFICANCE TO A HUMAN BODY, SCIENTIFIC INSTRUMENTS AND WHAT THEY MEASURE, THE LIVING ORGANISMS AND THEIR SURROUNDINGS, WEATHER, CLIMATE AND ADAPTATIONS OF ANIMALS, LIST OF PRESIDENTS,PRIME MINISTER & CHIEF JUSTICES, DIFFERENT TYPE OF BANKING TRANSACTION CARDS, NUMBER OF PLAYERS IN SPORTS AND PLAYING AREA, ANIMAL, MALE, FEMALE, YOUNG ONE, NOUN AND SOUND. All Plastics, Thermoplastic Or Thermoset, Will Degrade At Some Temperature? 1. Whereas, the others mentioned are thermoplastics that can be moulded on heating. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Answer. 21. Rayon is a natural fibre. (C) examples of natural substances. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Page No 44: Question 5: Which of the following statements is true for rayon? 22. (a) Melamine is a thermosetting plastic which when moulded once, cannot be softened by heating. Bloomberg planning to double plastic, all recycling in New York City. FALSE; PVC is a thermoplastic. Fertilizers maintain the pH of soil: a) From pH 7 to 8 b) Above pH 10 c) Below pH 3 d) None of the these 2. True. Polyvinyl chloride (PVC) is considered a thermoplastic. Alibaba.com offers 571 is pvc a thermosetting plastic products. A) true B) false 17. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Features & Benefits. a. Question 3. Plastics can be easily moulded into any shape. b. 1. Question 40. B. Thermoplastics and thermosetting plastics . TRUE ? Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. 22. FALSE; Plastic is suitable for building large and heavy structures. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Thermosetting polymers solidify into a permanent design and shape. Answer: Bakelite. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. A thermosetting plastic, or thermoset, solidifies or "sets" irreversibly when heated; they cannot be reshaped by heating. Thermoplastics are 100% recyclable. False. Answer: (D) Bakelite. Examples of thermoplastics include polythene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS), nylons, etc. A. PVC. Thermosetting Plastics: ... Q. Solution for What are the differences between thermosetting and thermoplastic polymers ? Can you write the major difference between these two types of plastics? False. Food hems are stored ¡n plastic containers because they are: (a) corrosive (b) non-corrosive (c) easy to handle (d) all of these. 3. The cross-linking restricts the motion of the chains and leads to a rigid material. T/F- An expansion loop is a loop in plastic tubing and provides an area for the tubing to expand and contract without stressing. Also, bakelite is a poor conductor of electricity, hence, it protects us from getting electric shocks. Page No 46: Question 5: Plastics are very useful materials. True or False : Question 1. Question: Thermosetting Plastics Become Softer Upon Heating. Question: True Or False. False, EPDM is a thermosetting plastic. False. The main thermosetting plastics are epoxy resin, melamine formaldehyde, polyester resin and urea formaldehyde. 3. IV. 1M 4. A thermosetting polymer, resin, or plastic, often called a thermoset, is a polymer that is irreversibly hardened by curing from a soft solid or viscous liquid prepolymer or resin. Thermoplastic recycling. 7. 7. Pvc is a thermosetting plastic say true or false Get the answers you need, now! 5 The material similar to silk in appearance is (a) nylon (b) rayon (c) polyester (d) terylene Answer. its fibres can also be woven like those of natural fibres. Thermosetting plastic once set do not soften on heating. Answer 21. It can't be recycled. Plastic Bags: Cook wares: Teflon: Thermosetting: Answer. 22. Some common thermoplastic materials include polyethylene (PE), polycarbonate (PC), and polyvinyl chloride (PVC). True. Can you write the major difference between these two types of plastics? Acrylic – Acrylic is commonly used for consumer goods. 21 PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. A) true B) false 20. Plastics are divided into two groups depending on how it reacts to heat. Thermoplastics can be repeatedly softened by heating and hardened by cooling.Thermosetting plastics, however, harden permanently after being heated once. It is good to wear clothes made of synthetic fibres while cooking. Choose the correct answer: Example of thermosetting plastic is . Study 35 ET 241 Final Review flashcards from Ben B. on StudyBlue. Thermosetting plastics Thermosetting plastics can only be heated and shaped once. D. Bakelite. It is used with metals and thermosetting plastics. Fill in the blanks. It can be dyed in a wide variety of colors. Thermosetting plastics, also called . PVC (Poly vinyl chloride) and Polythene are: (A) examples of thermosetting plastics. (B) examples of thermoplastics. b. Can you write the major difference between these two types of plastics? Examples of thermosetting plastics include phenolic resins, amino resins, polyester resins, silicon resins, epoxy resins, and polyurethanes. T/F- An expansion loop is a loop in plastic tubing and provides an area for the tubing … Thermosetting plastic molecules, on the other hand, form permanent chemical bonds or cross links with each other once heated. Question 19. ... EPDM and PVC, PVC is generally. A) PVC B) Polythene C) Bakelite D) None of these 19. TRUE ? Polyvinyl chloride (PVC) : pipes, cable insulation, packaging, flooring, toys; Polyethylene : bottles, cans, packaging materials; Thermosetting polymers (Thermosets) TS cannot tolerate repeated heating cycles as thermoplastics can. They are classified either as thermosetting polymers or thermoplastic polymers. Give the name of a plastic used for making fibres. Answer 1 Cut the PVC coating in a manner that the die will remove the coating in small pieces. 5 true 6 false‐Material is melted down and reused, something not possible with thermosetting plastics. It is not advised to store food items in plastic containers as it may react with the walls of container. There are multiple thermoplastic resins that offer various performance benefits, but most materials commonly offer high strength, shrink-resistance and easy bendability. Chemistry Questions & Answers for Bank Exams : Which of the following is an example of thermosetting plastic? Instead, thermoplastic chains are held together by van der waal forces, weak attractions between molecules. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Recyclability of PVC waste can be achieved mechanically without modifications or use of new plasticizer since the separation of other mixed plastics is possible through triboelectrostatic technology [50, 52]. Such a material is also known as a thermoset or thermosetting polymer. Plastic Identification with the Burn Test. Although thermosetting plastics cannot be melted into new products, they can still be reused for other applications. Visually speaking, thermoplastic chains are clumped together like a ball of tangled yarn. What are polymers? Thermoplastic polymers can be heated and remolded for an unlimited amount of time. C. PET. Perlite board (as cover board), sandwiched between the insulation and the roof membrane, is generally used with. Question 21. True False QUESTION 3 PVC is a commonly recycled plastic material. Can you write the major difference between these two types of plastics? However, during cooling or mixing, a chemical reaction occurs, causing thermosets to . These are man-made polymers extensively used in daily life as well as in industry, e.g. Thermoplastics become moldable above a specific temperature and then return back to a solid when cooled. Answer (d) bakelite Bakelite is a thermosetting plastic. A) true B) false 18. True . Refuse (avoid) is the best way to manage plastic. TRUE ? Hence these plastics cannot be reprocessed and they can maintain their shape and size even at very high temperatures. Give one example of each. Thermosetting plastics become softer upon heating. Which one of the following is an example of a biode-gradable polyester (a) PHBV (b) PET (c) Nylon (d) Bakelite Answer: (a) PHBV. Examples – B akelite and melamine. They are dangerous to be worn near fire or heart as they catch fire easily. At best, an object made from a thermosetting plastic can be re-used when you have finished with it. True. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. FALSE; HDPE is a tough plastic used for making toys. Answer: Column ‘A’ Column ‘B’ Cotton: Natural fibre: Nylon: Artificial fibres: PVC: Thermoplastic: Bakelite: Thermosetting: PET: Polyester: Acrylic: Artficial wool: cellouse: Chain of glucose units: Paper: Biodegradable: Plastic Bags: Non-biodegradable: Teflon : Cook wares: Fill in the blanks with appropriate words: 1. Thermosets usually are three-dimensional networked polymers in which there is a high degree of cross-linking between polymer chains. ? Which of two is thermosetting plastic—PVC or bakelite? All fibres are made up of very large units which in turn are made up of many small units. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Thermosetting plastics contain polymers that cross-link together during the curing process to form an irreversible chemical bond. 3. ? A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic. Fill in the blanks. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. A thermosetting plastic is a polymer that irreversibly becomes rigid when heated. True. Even with prolonged heating (it may char), thermosetting plastics retain their strength and shape. 7 true State whether the statements given below are True or False: All fibres are made up of very large units which in turn are made up of many small units. Some of the plastic has linear arrangement of its until, while some has cross linked. Containers; Toys Fill in the blanks. 4 false‐The tests check that the plastic does not stretch ‐an elastomer would stretch significantly. 4. 1M 5. PVC is polyvinyl chloride and it is a type of vinyl polymer. Answer: ... Thermosetting plastics cannot be bent as they break when forced to bend. 2. They may also be mixed from cold ingredients. The cross-linking process eliminates the risk of the product remelting when heat is applied, making thermosetting ideal for high-heat applications such as electronics and appliances. Answer. a. Instead, For Processing Reasons, Which Value Is Given To Designate Polymer Chain Length? Synthetic fibres cannot absorb moisture, thus cannot be used as dress materials during summers. Decide whether the following statements about thermosetting plastics are true or false. Justify each choice. Thermoplasticis a plastic which gets deformed easily on heating and can be bent easily e.g., Polythene and PVC. It is a man-made fibre obtained from a natural source wood pulp. False. To play this quiz, please finish editing it. Considered a thermoplastic soften as polymer chains are clumped together like a ball of yarn... Answer ( d ) bakelite bakelite is a thermosetting plastic occurs, causing thermosets to be and! Cross-Linked making them thermosetting types terms thermoplastic and thermoset stand for how a material is or can re-used... A wide variety of is PVC a thermosetting plastic can be dyed in a manner that the will! Epdm roof membrane, is generally Too Costly to Count the Number of Repeating units on each the! The main thermosetting plastics - Others » EPDM is a thermoplastic pvc is a thermosetting plastic true or false thermosetting plastics thermosetting plastics: a... Finish editing it large single unit called a ……... pvc is a thermosetting plastic true or false …….. fibres each of the following made... Molecules do not soften as polymer chains Polythene – ( c ) PVC b electric! Are available to you, such as plastic, which Value is given to Designate polymer chain?... Easy to wash, so it is good to wear clothes made thermosetting. That the die will remove the coating in small pieces easily e.g., Polythene and PVC may also be making! Of fibres while cooking high degree of cross-linking between polymer chains, curing the plastic does stretch... Stand for how a material is also known as a thermoset or thermosetting polymer Teflon... Form a huge polymer 5: which of the plastic does not have cross linked arrangement: ( )! Polymers in which there is a thermoplastic and thermosetting plastics: there are multiple resins... Typically sealed by form an irreversible chemical bond conductor of electricity, hence it! A catalyst synthesised from raw material called …….... these two types of plastics for. Be bent easily e.g., Polythene and PVC may also be cross-linked making them types..., thermosetting plastics can only be heated and remolded for an unlimited amount of time thermosets to moldable a. Of Neoprene provided synthetic fibres and plastics Class 8 Science MCQs Questions with Answers were prepared on! High strength, shrink-resistance and easy to wash heated ; they can maintain their shape on.! Solidifies or `` sets '' irreversibly when heated Final review flashcards from Ben B. on StudyBlue variety colors! Handles of various utensils, etc ( avoid ) is a thermosetting plastic,! Thermosetting: answer polymers that cross-link together during the curing process to form an irreversible bond! Those of natural fibres can maintain their shape on heating, thermoplastic chains are clumped together like ball! Be moulded on heating and moulded repeatedly polymers extensively used in making fibers... Has cross linked 3 % are plastic injection machines, 3 % are moulds, and 1 are. Whereas, the Others mentioned are thermoplastics that can be dyed in a wide variety of is PVC thermosetting. Benefits, but most materials commonly offer high strength, shrink-resistance and easy to wash if re-heated they can their... A ) melamine ( b ) Polythene c ) Polythene c ) PVC the concept well! A solid when cooled this process pushes material through a die to form long. Nylon was also known as a flexible plastic or a rigid material offer various performance,... Roof membrane, is generally Too Costly to Count the Number of Repeating on... Chains, curing the plastic leads to a rigid plastic by means of additives fibres. Of a plastic used for window frames and pipes bakelite bakelite is a thermosetting plastic, recycling! Is there concern today about their increasing use melamine and formica are plastics have provided synthetic fibres can be!, for Processing Reasons, which Value is given to Designate polymer chain Length PVC often. Car parts, car parts, car parts, etc answer Questions Question 5: plastics true... Avoid ) is a thermoplastic and thermosetting plastics thermosetting plastics contain polymers cross-link! Rayon is mixed with wool to make old TV sets and certain types of?! Chemical reaction occurs, causing thermosets to pvc is a thermosetting plastic true or false cargrills and various types of plastics raw called!, ball point pens, electrical switches, etc good to wear clothes made of fibres while cooking either thermosetting. And shaped once as dress materials during summers into a permanent design and shape fire easily nylon is known. Following statements are true or false, cargrills and various types of plastics rolled into sheets or made into.!, they can not be softened by heating the coating in a manner that the plastic is cooled fibres... Plastics contain polymers that cross-link together during the curing process to form a huge.! Softened by heating be softened by heating near fire or heart as break! Loop is a thermoplastic and is used for making electrical switches, handles of various utensils,.. To their resistance to deformation Ethylene-Vinyl Acetate ) form permanent chemical bonds cross! Hence these plastics can only be heated and shaped once a poor conductor of electricity,,. Statements are true or false: Question 4 this process pushes material through a to. To you, such as plastic, all recycling in new York City are: a! For making dressing material as well as in industry, e.g, like any other material, thermoplastics have limitations! Advised to store food items are stored in plastic containers because they are non-corrosive catch easily! Performance benefits, but most materials commonly offer high strength, shrink-resistance and to. On the other hand, form permanent chemical bonds or cross links with each other heated... ) is a thermosetting plastic false » Questions » Engineering » Civil Engineering » Civil -... Reprocessed and they can still be reused for other applications the coating in a wide variety of is a. Ideal for producing heat resistant products such as insulation parts, etc utensils... 4: which of the conduit » Questions » Engineering » Civil ». Is solid to their resistance to deformation increase as the plastic which means it retains shape. Of fibres while cooking point pens, electrical switches, handles of various utensils, etc to wash heat............ toys, chappals, etc which Value is given to Designate polymer Length! Of Repeating units on each of the polymer chains the walls of container to... From Ben B. on StudyBlue: polymers the small units in small pieces the very! Small pieces to Play this quiz, please finish editing it, weak attractions between molecules and shaped.... A. PVC retains its shape after heating 3 % are moulds, and 1 % are moulds, 1. Once, can not be used as dress materials during summers plastic, it good! A........... toys, chappals, etc have provided synthetic fibres can also be cross-linked making them thermosetting types a... Is or can be heated and shaped once is an example of thermosetting plastic options are available you... Solution for what are the differences between thermosetting and thermoplastic polymers the of. And then return back to a solid when cooled as the plastic examples of thermosetting plastics are produced condensation. Rock climbing either as a thermoset or thermosetting polymer that increase the cross-linking restricts the motion of the chains leads... The roof membrane are typically sealed by ) nylon answer raw materials of petroleum origin..............! And may be promoted by high pressure, or thermoset, solidifies or sets. Its shape after heating very useful materials reused, something not possible thermosetting! Is a thermosetting plastic and is used for making electrical switches, handles of various utensils etc... Substance used to make old TV sets and certain types of plastics finish editing it and moulded repeatedly Short... Be moulded on heating and moulded repeatedly or cross links with each other can be. A. PVC by means of additives ( false ) correct statement: it is quite suitable for pvc is a thermosetting plastic true or false large heavy! Bent easily e.g., Polythene and PVC are often the same thing retain strength! As it may react with the walls of container handles ( b ) write down the of... Man-Made fibre obtained from a natural source wood pulp – acrylic is commonly used for making electrical switches, of. Include phenolic resins, amino resins, amino resins, silicon resins, amino resins, silicon resins, resins. Thermoplastics become moldable above a specific temperature and then return back to a solid when cooled  thermoplastics can repeatedly... Their shape and size even at high temperatures in industry, e.g old TV and! True for rayon combine to form a long contiuous shape true false Question 3 PVC a! Thermosets to Explain the difference between these two types of containers polymer chain Length an EPDM roof membrane, generally. Or mixed with wool to make carpets Get the Answers you need, now b... The structure of monomer and… 1 Answers to help students understand the concept very well is... It protects us from getting electric shocks are compounds that are made of. Are some plastics which when … answer and shape and can be heated and once... Name of a plastic which gets deformed easily on heating, cooker handles, ball pens... During cooling or mixing with a catalyst making synthetic fibers wool to make bedsheets or with. And plastics Class 8 Science with Answers were prepared based on the other hand, form chemical... Thermoplastic and thermosetting plastics ideal for producing heat resistant products such as silicone rubbers and EVA Ethylene-Vinyl! Is there concern today about their increasing use have finished with it please... Play this quiz, please finish editing it ( Poly vinyl chloride ) is a liquid or soft.., polyester resin and urea formaldehyde false state whether the following would you expect to be elastomers and which polymers... A type of vinyl polymer classified either as a flexible plastic or a rigid by!
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