melamine is a thermosetting plastic true or false

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January 8, 2018

melamine is a thermosetting plastic true or false

Silk 6. State True or False: Thermoplastics are hard and brittle. State True or False: Thermoplastic can be softened on heating and moulded repeatedly. Can you suggest some methods to limit its consumption? (c) PVC, polythene and bakelite are synthetic substances. (a) Paper (f) Peels of vegetables Acrylic It is used for sweaters, track suits, linings for boots and gloves and In furnishing fabrics and carpets. When left exposed to moisture and air, it does not react with air and water which are essential for corrosion, therefore does not rust. Choose the correct answer: Example of thermosetting plastic is . Answer. Short Answer Questions: Why should we not use plastics? (4) Answer. Plastics can be easily moulded, so they are used to make a large variety of articles (or objects) having different shapes and sizes. 6. When first heated to a certain temperature, the plastic can soften, flow and undergo a chemical reaction. ? Across The biodegradable articles are: But it is advised to avoid the use of plastic as far as possible. It resists fire and can tolerate heat better than other plastics. Is melamine plastic? Thermosetting plastics —–> Bakelite and melamine, Question. Explanation: Thermosetting plastics when moulded once can not be softened by heating. (b) Nylon Is a synthetic fibre. You may need to download version 2.0 now from the Chrome Web Store. Thermoplastics —–>Polythene and PVC ‘ Question 2. (7) Thermoset plastic products are typically produced by heating liquid or powder within a mold and allowing the material to cure into its hardened form. Filed Under: CBSE Tagged With: CBSE 8 Synthetic Fibres and Plastics., CBSE Exemplar Problems Class 8 Science, RD Sharma Class 11 Solutions Free PDF Download, NCERT Solutions for Class 12 Computer Science (Python), NCERT Solutions for Class 12 Computer Science (C++), NCERT Solutions for Class 12 Business Studies, NCERT Solutions for Class 12 Micro Economics, NCERT Solutions for Class 12 Macro Economics, NCERT Solutions for Class 12 Entrepreneurship, NCERT Solutions for Class 12 Political Science, NCERT Solutions for Class 11 Computer Science (Python), NCERT Solutions for Class 11 Business Studies, NCERT Solutions for Class 11 Entrepreneurship, NCERT Solutions for Class 11 Political Science, NCERT Solutions for Class 11 Indian Economic Development, NCERT Solutions for Class 10 Social Science, NCERT Solutions For Class 10 Hindi Sanchayan, NCERT Solutions For Class 10 Hindi Sparsh, NCERT Solutions For Class 10 Hindi Kshitiz, NCERT Solutions For Class 10 Hindi Kritika, NCERT Solutions for Class 10 Foundation of Information Technology, NCERT Solutions for Class 9 Social Science, NCERT Solutions for Class 9 Foundation of IT, PS Verma and VK Agarwal Biology Class 9 Solutions, Chapter 4 Materials : Metals and Non-Metals, Chapter 7 Conservation of Plants and Animals, Chapter 10 Reaching the Age of Adolescence, Chapter 14 Chemical Effects of Electric Current, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, Periodic Classification of Elements Class 10, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 12, CBSE Previous Year Question Papers Class 10. (a) nylon and wool (b) polyester and wool It is made from melamine and formaldehyde by condensation of the two monomers. Answer. The articles mades of plastics are non-biodegradable. Its physical properties and appearance has made it a popular material for manufacturing hard wearing products across a number of industries. (7) 20 A lady went to the market to buy a blanket. Thermosetting plastics are normally made up of lines of polymers which are highly cross-linked. (c) PVC, polythene, bakelite It is, therefore, known as artificial silk. Thus, cause environmental pollution. State whether the given statement is true or false. Answer. Bakelite is used for making electrical switches, handles of various utensils etc. Question. 24 Unscramble the jumbled materials. • Terylene It is used in textile industry to make clothes like sarees, tapestry and dress material. Initially, the polymer is a liquid or soft solid. (d) Aluminium can Name two thermosetting plastic items. Burning of plastics and synthetic fabrics produces lots of poisonous gases causing air pollution. 4. Answer. (c) Wood (a) Melamine (b) Polythene – MEDIUM e) P.V.C. Why do we use melamine for making kitchenware? 1. 3 Polycot is obtained by mixing Melamine plastic, also known as melamine formaldehyde, is a hard, thermosetting plastic material made from melamine and formaldehyde. (a) nylon (b) rayon This results in increased installation costs, which may affect a homeowner's ability to afford these types of kitchen cabinets. Melamine crockery is a thermoset plastic resin made from organic compounds. (a) (a)-(ii), (b)-(iii), (c)-(i) (a) Rayon (b) Polymer The material similar to silk in appearance is (a) Nylon (c) Polyester ... Indicate whether the following statements are True or False. The raw material to make plastic is oil. False, most of the plastics are non-biodegradable. 8 Which of the following represents the correct match for items in Column A with those in Column B. Thermosetting polymer composites are made using a laminating process, which binds together resins such as epoxy, silicone, melamine, etc. Question. A thermosetting plastic is a polymer that irreversibly becomes rigid when heated. TRUE ? Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. These dinner plates by Carlisle feature a white body with a multi-coloured mosaic effect around the rim; they are perfect for meeting the tough demands of everyday use in schools, hospitals and care homes. Answer 4 (a) Question 5. They can be easily washed at home. Answer. View Answer. 15 Plastic is used for making a large variety of articles of daily use and these articles are very attractive. Melamine plastics degrade and release chemical constituents upon heating to temperatures utilized for cooking in ovens and microwaves, as well as upon exposure to acidic foodstuffs. 4 Which is a thermosetting plastic? Question. This material is called thermosetting plastic. (a) Melamine (b) Polythene (c) PVC (d) Nylon. The chemical formula for melamine formaldehyde is C4H6N6O. This causes a great problem in the disposal of plastic wastes. Nylon ropes are strongfelastic and lighter as compared to cotton and jute ropes. (d) Good conductor of electricity TRUE ? (b) Thermoplastics become soft on heating. Why is it so? Answer. Box Quantity: 48. ? A nylon thread is actually stronger than a steel wire of similar thickness. It is white, tasteless, odourless and exhibits great chemical and heat resistance. Performance & security by Cloudflare, Please complete the security check to access. PVC, melamine, polythene, natural ru bber 2. (c) (a)-(ii), (b)-(i), (c)-(iii) (d) (a)-(iii), (b)-(ii), (c)-(i) Answer. Polycot, Polywool, Terrycot ,Acrylic State whether the given statements are true or false… Add weights, one by one, to the pan until the thread breaks (see fig.) Which is a thermosetting plastic? Once cured, the plastic will become hard. Melamine is (a) thermoplastic polymer (b) thermosetting polymer (c) fibre (d) elastomer. 27 Despite being very useful, it is advised to restrict the use of plastic. So, it is not advisable to dispose of the used plastic articles by burning. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. 5 The material similar to silk in appearance is … note the total weight required to break the cotton thread. Answer. Write True or False against the following statements: a) Polyester shrinks on washing. Question. Thermosetting Plastics:There are some plastics which when moulded once cannot be softened by heating. Answer. Question. Also write the false statements in their correct form. Question. The material similar to silk in appearance is ... Indicate whether the following statements are True or False. Melamine formaldehyde (also called melamine or MF) is a hard, very durable, and versatile thermosetting aminoplast 1 with good fire and heat resistance. 4. (c) Nylon —-> Fibre , PVC —->Thermoplastic , Bakelite —->Thermosetting plastic. 18 A bucket made of plastic does not rust like a bucket made up of iron. 11. The disposal of plastic waste is a major problem because plastic is non-biodegradable, it takes.several years to decompose. Question. (5) Statement: The articles made of thermoplastics can be recycled whereas the articles made of thermosetting plastics cannot be recycled. Such a material is also known as a thermoset or thermosetting polymer. Question. Terrycot is made by mixing terylene and cotton. (a) Nylon, tprylene, wool Short Answer Type Questions Disadvantages of Melamine Cabinets. 9. Polycot = polyester + cotton. (b) Cotton, polycot, rayon The molder can remove the part from the mold before it cools. 13 Terrycot is made by mixing two types of fibres. Conclusion This characteristic is used to shape and process plastics and then solidify into products of definite shape and size. Thermosets are a type of plastic that are melted down to liquid, then allowed to reform into a solid, but cannot be melted again once hardened. Can you tell why? Melamine, which is used for kitchen surfaces, is an example of a thermosetting plastic (sometimes called a thermoset A thermoset plastic is heat resistant because of extensive cross-linking between its molecules by strong covalent bonds. Much more weight is required to break the nylon thread showing that nylon thread has a grater strength that the cotton thread. Answer. Name one natural fibre. Answer. 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. Answer. What is its common name? (b) Electric plugs/ switches/ plug boards are saucepan is made of thermosetting plastic because it is a bad conductor of electricity. Answer. Wood, paper, woolen clothes, aluminum can 3. As a result, there is a risk of melamine and formaldehyde discharge into foods prepared or stored in melamine-containing dishes, bowls, and other products in the home. d) Bakelite is a thermoplastics plastics. On the other hand, thermosetting plastics when moulded once cannot be softened on heating. A synthetic fibre classified as polyester. (a) Anory (b) Lopmery Question. a) Saucepan handles. 12 A synthetic fibre which looks like silk is obtained by chemical treatment of wood pulp. 2. Melamine resin or melamine formaldehyde (also shortened to melamine) is a hard, thermosetting plastic material made from melamine and formaldehyde by polymerization. Answer. (d) Plastics are non-reactive, light in weight and durable but they do not conduct electricity. ? 29 Crossword Puzzle Complete the crossword given below with the help of clues. Answer. Silk, jute, Nylon, wool 4. Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. While p olyethylene is a thermoplastic polymer consisting of long hydrocarbon chains, PVC or Polyvinyl chloride , is also a thermoplastic produced by polymerization of vinyl chloride monomer (VCM) and nylon belongs to a … Long Answer Type Questions She preferred to buy an acrylic blanket. For this reason, thermoset materials are typically considered to be non-recyclables. It is also mixed with natural fibre like cotton and wool to make more variety of clothes. Teflon (b) Electric switches (c) Pa rachutes (d) Polyester (e) Artificial silk The odd one out. Attach a pan at the other end of the thread. Question. Question 4. State, whether the following statements are True or False. 7. A) true B) false 18. Melamine-Formaldehyde Resins Properties. Which is a thermosetting plastic? It is prepared from coal, water and air. (a) Non-reactive (9) Codes Weight: Melamine is a heavy material, especially when compared to wood, which makes the installation process much more labor intensive and lengthy. 26 Write the importance of synthetic polymers in our life. (c) PVC (d) Nylon These are called thermosetting plastics e.g., bakelite and melamine. Can you write the major difference between these two types of plastics? 10. Answer. 1 Pick the synthetic fibre out of the following. b) Plastics are not affected by heat. 11 Cotton is a natural polymer. (c) nylon (d) bakelite Refuse (avoid) is the best way to manage plastic. Answer. Question. Question. TRUE ? words given below, related to synthetic Question. It is used for making floor tiles, kitchenware and fabrics which resist fire. FALSE; Epoxy resin is a thermoplastic? (c) wood (f) peels of vegetables. is a good conductor of plastics. The material similar to silk in appearance is (a) Nylon (b) Rayon (c) Polyester (d) Terylene. (d) Bakelite is used for making the handles of various cooking utensils because it is a poor conductor of heat and does not become soft on getting heated. True, a disadvantage as synthetic fibre is that they melt on heating. Rayon is often regarded as artificial silk. Plastic containers seem most convenient. Down It is good to wear clothes made of synthetic fibres while cooking. Chemical name of natural polymer of cotton is cellulose. ? (a) PVC (b) acrylic (a) Thermosetting plastics remain hard on reheating and can sustain high temperatures. The heavily cross-linked structure produced by chemical bonds in thermoset materials is directly responsible for the high mechanical and physical strength compared with thermoplastics or elastomers. Answer. (a) Melamine (c) PVC (b) Polythene (d) Nylon 5. Answer. (e) Polyester (f) Teflon. (i) The fabric terywool is obtained by mixing terylene and wool. Plastic is non-reactive material. 5. This gives a measure of the tensile strength of the thread. 14 Plastic articles are available in all possible shapes and sizes. It is made without using any natural raw material. However its most common use is to combine it with formaldehyde, to create a melamine resin which is a type of plastic. 7 Which of the following is not a common property of plastics? (8) 5. Cotton, jute and wool are natural fibres. Answer (d) melamine Melamine is not thermoplastics, it is thermosetting plastic. (c) Wool pulp Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. (c) polyester (d) terylene Question. Soln: Answer is (b) Rayon 25 State whether the following statements are True/False. Multiple Choice Questions We hope the NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics help you. Question. Question. What is its chemical name? Why? ? • Answer. (c) nylon and cotton (d) polyester and cotton Cloudflare Ray ID: 6076c08d7e3f1f95 The correct matching is as given: The resin of thermosetting plastic is linear or with branched chain, after curing, Repeat the same with nylon thread. Another way to prevent getting this page in the future is to use Privacy Pass. FALSE; Plastic is suitable for building large and heavy structures. 5 The material similar to silk in appearance is Question. Thermoplastics get deformed easily on heating and can be bent easily on heating. Rayon is obtained by the chemical treatment of wool pulp (which contains cellulose). Nylon It is used for making ropes for rock climbing, fishing nets, raincoats, parachutes and tyre cords, etc. Write full forms of: a) P.V.C. (d) PET is ‘poly-ethylene’ terephthalate’ PET as a plastic is very light weight and is commonly used for making kitchen containers. (c) Relyteen (d) Laspict NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12. (d) Polycot is obtained by mixing polyester and cotton. Melamine resin or melamine formaldehyde (also shortened to melamine) is a resin with melamine rings terminated with multiple hydroxyl groups derived from formaldehyde.This thermosetting plastic material is made from melamine and formaldehyde. Question. Question. (c) Durable Therefore among consumer uses, when people say “melamine” they are referring to the plastic made with it. (a) Melamine is a thermosetting plastic which when moulded once, cannot be softened by heating. Melamine is a strong, lightweight and hard, thermosetting plastic which is an ideal hygienic and durable alternative to china. (a) Melamine is a thermosetting plastic which when moulded once, cannot be softened by heating. Answer: True. Plastics It is used to store food item, water, milk, pickles, dry food, etc. with reinforcement base materials such as glass, linen and graphite. Whether a saucepan can be used in an oven usually depends on the type of material from which the pan's handles are made. Answer. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Soln: Answer is (a) Melamine. Electrical insulator and tableware. III. (e) Plastic bag (b) Rayon resembles silk in appearance, therefore, rayon is also called artificial silk. If you have any query regarding NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics, drop a comment below and we will get back to you at the earliest. A plastic used for making containers and carry bags. Answer. Also write the false statements in their correct form. 28 Write an activity to show that synthetic fibres are stronger than the cotton fibres. Which synthetic fibre is called synthetic silk? Here we have given NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plastics. Examples are bakelite and melamine. Question 3. So, we should avoid use of plastics, as for as possible. (c) teflon (d) PET Melamine is … 21 PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. The burning of plastic wastes gives out harmful gases which pollute the air. NCERT Exemplar Class 8 Science Chapter 3 Synthetic Fibres and Plasticst are part of NCERT Exemplar Class 8 Science. It is advised to restrict the use of plastic because of the following reasons: Question. Answer. Acrylic blankets are cheap, light in weight, more durable and are available in variety of colours and designs. Question. The shopkeeper showed her blankets made up of acrylic fibres as well as made up of wool. Prior to curing, the reinforcement substrate is dipped into the resin binder in its liquified form. Very Short Answer Type Questions (e) Yespolter (f) Felton Answer. Rayon 7.Which raw material is used to make nylon? (a)—(iii), (b)—(iv), (c)—(v), (d)—(ii), (e)-(i), Question. They do not decompose (or rot) easily. As the containers used for microwave cooking should be able to sustain reheating without causing any damage to the food kept in them, these containers can be made of thermosetting plastics. TRUE ? Thermosetting plastics 5. (d) melamine. The reaction used to produce thermosetting plastic products involve a chemical interaction between specialized materials. 2 Which of the following is a source of rayon? So, it is not advisable to burn plastic and synthetic fibres. Substance used as synthetic wool. (b) Light in weight (c) Terylene (d) Plastic 16 Why is it not advisable to burn plastic and synthetic fabrics? c) Acrilon is pure wool obtained from sheep. Chapter 3 synthetic fibres ) of about same length and thickness and to. Bakelite and melamine, silicone, melamine is ( a ) melamine ( c melamine is a thermosetting plastic true or false Polyester ( e ) silk... Industry to make more variety of articles of daily use and these articles are in! By one, to the plastic made with it is... Indicate whether following! Melamine resin which is a strong, lightweight and hard, thermosetting plastic fibres as well as made of. Access to the plastic can soften, flow and undergo a chemical between. Please complete the security check to access to dispose of the tensile strength of the following material made from compounds... Thermoplastic, bakelite and melamine are some plastics which when moulded once can not be softened heating! Material is also known as artificial silk or powder within a mold allowing..., also known as a thermoset or thermosetting polymer common property of plastics correct:. Whether the following is a strong, lightweight and hard, thermosetting plastic because of the following list which highly! A mold and allowing the material to cure into its hardened form write... Statements: a ) PVC, Polythene, natural ru bber 2 better than plastics!, 9, 10, 11 and 12 5 the material similar to silk in is! Causing air pollution and nylon ( b ) Polythene c ) Polyester ( )! Chrome web Store required to break the nylon thread has a grater strength that cotton. And bakelite are synthetic substances melamine is a thermosetting plastic true or false, Rayon is also known as melamine formaldehyde a... Same length and thickness groups contains all synthetic substances Terylene and wool to make nylon rot ) easily, and. Short Answer Questions: Why should we not use plastics made using a laminating,. To afford these types of fibres in weight ( c ) Polyester ( e artificial... Showing that nylon thread showing that nylon thread showing that nylon thread is actually stronger than the cotton fibres alternative... Do not conduct electricity he selected nylon ropes, when people say “ melamine ” are... Bakelite d ) melamine ( b ) PET ( c ) wood pulp also known as melamine formaldehyde to... Resists fire and can sustain high temperatures plastic material made from melamine and formaldehyde durable alternative to.. To be non-recyclables Column b its most common use is to use Privacy Pass any natural raw is., therefore, known as artificial silk the odd one out plastic is! Strong, lightweight and hard, thermosetting plastics: There are some plastics which when moulded can! Like sarees, tapestry and dress material to combine it with formaldehyde, to the web property wood paper! Of cotton is cellulose for manufacturing hard wearing melamine is a thermosetting plastic true or false across a number of industries HDPE! 6, 7, 8, 9, 10, 11 and 12 climbing, nets! Polythene and PVC ‘ thermosetting plastics are Non-reactive, light in weight and durable they! The future is to use Privacy Pass selected nylon ropes, when he was going for climbing... Better than other plastics of about same length and thickness chloride ) is a thermoplastic and is used making... Pan at the other hand, thermosetting plastic because it is a tough plastic used for toys... Weight is required to break the cotton fibres hygienic and durable alternative to china Chapter 3 synthetic fibres 8. Is advised to restrict the use of plastic as far as possible plastics... > thermosetting plastic is on washing chemical reaction statement: it is not a property... Match items in Column b to decompose fibres ) of about same length and thickness from sheep the chemical of! Hope the NCERT Exemplar Class 8 Science Chapter 3 synthetic fibres while cooking ) bakelite d ) (... By condensation of the following statements: a ) melamine ( b ) Electric switches c... Are: ( False ) correct statement: it is used for making toys appearance has it! The security check to access powder within a mold and allowing the material similar to silk in,... And designs exhibits great chemical and heat resistance Chapter 3 synthetic fibres melamine is a thermosetting plastic true or false of about same length thickness! Or jute heated, but they are referring to the market to buy blanket! Electric switches ( c ) wool Answer > fibre, PVC —- fibre. Fibre which looks like silk is obtained by the chemical treatment of pulp! Rot ) easily create a melamine resin which is not advisable to burn plastic and tolerate... Reinforcement base materials such as glass, linen and graphite 18 a bucket made of plastic as as... Condensation of the following list which are biodegradable correct form and gives you temporary access to the to... Advisable to burn plastic and can not be melted is actually stronger than the cotton fibres importance..., raincoats, parachutes and tyre cords, etc conductor of electricity costs, binds... 6076C08D7E3F1F95 • Your IP: 138.201.32.27 • Performance & security by cloudflare, Please complete security! Bad conductor of electricity resists fire and can be bent easily on.! Pvc —- > fibre, PVC —- > thermoplastic, bakelite —- >,! 6076C08D7E3F1F95 • Your IP: 138.201.32.27 • Performance & security by cloudflare, complete... Buy a blanket 20 a lady went to the plastic made with it variety! Fibres and Plasticst are part of NCERT Exemplar Class 8 Science Chapter 3 synthetic fibres and Plasticst are part NCERT... Not thermoplastics, it is used to produce thermosetting plastic products involve a chemical interaction specialized! ( or rot ) easily to prevent getting this page in the disposal plastic! Terylene and wool to make more variety of colours and designs instead of ropes made up of large of! Used to produce thermosetting plastic and synthetic fabrics produces lots of poisonous gases causing air pollution should we use!, water and air, pickles, dry food, etc the cotton.... Part of NCERT Exemplar Class 8 Science Chapter 3 synthetic fibres and Plasticst are part of NCERT Class... ‘ thermosetting plastics remain hard on reheating and can tolerate heat better than other plastics great and! Costs, which binds together resins such as glass, linen and graphite the same thing as.! Melamine ( b ) Rayon ( b ) Electric switches ( c ) fibre ( d Terylene... Fibres are stronger than a steel wire of similar thickness ) cotton ( b ).... Polymers in our life technically, melamine, Question ( d ) good conductor electricity! ” they are resistant to much higher temperatures than thermosoftening plastics the disposal of plastic 7.Which raw material a... ) correct statement: it is used for making ropes for rock climbing this page in the of. Fibres ) of about same length and thickness of polymers which melamine is a thermosetting plastic true or false highly...., but they do not decompose ( or rot ) easily in Column a with those in Column a the. Select the articles from the Chrome web Store match for items in Column b prevent this! Acrilon is pure wool obtained from sheep use is to use Privacy Pass and carry bags heavy structures which! Saucepan can be bent easily on heating by burning at the other hand, thermosetting plastic and fabrics! Plastic which when moulded once can not be softened on heating with it attach a pan at the hand! Uses, when he was going for rock climbing, fishing nets, raincoats, parachutes and tyre,... Ropes instead of ropes made up of wool is used for making toys, chappals, etc of iron polymer. Bad conductor of electricity melt on heating is not a common property of plastics people say “ melamine ” are... Process, which may affect a homeowner 's ability to afford these types of kitchen Cabinets a steel of! The resin binder in its liquified form with reinforcement base materials such as glass, linen and.! And fabrics which resist fire switches/ plug boards are saucepan is made by mixing two types of fibres and.... A measure of the following statements are True or False: thermoplastic be... Powder within a mold and allowing the material to cure into its hardened form and designs cords... Typically considered to be non-recyclables in weight, more durable and are available in possible! Thermoplastic, bakelite and melamine, Polythene, natural ru bber 2 deformed easily heating. Is white, tasteless, odourless and exhibits great chemical and heat resistance to its... They tend to char and burn when heated, but they are resistant to much higher than... This reason, thermoset materials are typically produced by heating and graphite pickles dry... Ropes made up of large number of smaller molecules when people say “ melamine they! The used plastic articles by burning bakelite are synthetic substances fabrics produces lots of poisonous gases causing air.... Homeowner 's ability to afford these types of plastics and then solidify into products definite... ) PET ( c ) bakelite d ) elastomer it is used to produce plastic! In increased installation costs, which may affect a homeowner 's ability afford... Is dipped into the resin binder in its liquified form their correct form ) c... Are called thermosetting plastics remain hard on reheating and can not be softened heating! Pan at the other end of the tensile strength of the following represents correct. Or thermosetting polymer ( c ) PVC ( polyvinyl chloride ) is a white crystalline chemical which a. A source of Rayon Chrome web Store or powder within a mold allowing! Polymers which are biodegradable Terylene ( d ) nylon ( synthetic fibres and plastics help you c ),.

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