So is that stacking of an aromatic ring on top of each other to create London dispersion forces or just the links between the 2d molecule? I see. It is a thermosetting plastic, with the familiar trade name Bakelite, that can be molded by heat and pressure when mixed with a filler-like wood flour or can be cast in its unfilled liquid form or cast as foam (e.g. Question 12. It has excellent tensile and compressive strength and is an excellent electrical insulator. There are many variations available with additives that enhance properties such as plasticizers to improve impact strength, lubricants to reduce the coefficient of friction and anti … A) It is soft, strong and heavy. Thermoplastic is lower in molecular weight, compared to thermosetting plastic. Which of the following is obtained from hair of an animal: (a) nylon (b) silk (c) cotton (d) wool. The material similar to silk in appearance is (a) Nylon (b) Rayon (c) Polyester (d) Terylene. Thermoplastic is more flexible and provides additional resistance to … True. Science MCQs for Class 8 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Some other examples are PVC, Nylon. Soln: Answer is (a) Melamine. The primary difference between the two is that Thermoset is a material that strengthens when heated, but cannot be remolded or heated after the initial forming, while thermoplastics can be reheated, remolded, and cooled as necessary without causing any chemical chan… Which is a thermosetting plastic? Thermoplastics have low melting points and low tensile strength. Thermoset plastics get melted when the heat is applied and get the desired shape. Question 18. Thermoplastic is lower in molecular weight, compared to thermosetting plastic. Explain the difference between thermoplastic and thermosetting plastics. Nylon 1 See answer nehasancheti2424 is waiting for your help. Students can solve NCERT Class 8 Science Synthetic Fibres and Plastics MCQs Pdf with Answers to know […] The members of the family are distinguished from each other by a numbering system indicating the chemical composition of the polymer molecule. Thermosetting plastics have primary bonds between molecular chains and held together by strong cross-links. Thankyou, im cramming for my exam tomorrow and that’s what im probably going to go with. Thermoset plastics once molded are unaffected by any solvent or heat. Thermoplastic and thermosetting plastics Plastics can be subdivided into two large categories: thermoplastic and thermosetting. Depending on the resin, thermoplastics can serve low-stress applications such as plastic bags or high-stress mechanical parts. 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. The material difference between the two is that thermoplastics can be remelted, while thermoset plastics remain in a permanent solid state once hardened. Answered By . Some thermosetting plastics including polyurethanes and friction and wear grades of DuPont™ Vespel® shapes … A thermosetting plastic is a polymer that irreversibly becomes rigid when heated. Answer (d) bakelite Bakelite is a thermosetting plastic. On a molecular level, Kevlar has Mo’ order, Mo’ discipline. Answer (b) non-corrosive Food items are stored in plastic containers because they are non-corrosive. Copyright © no plastic bags, but bakelite a hard thermoset plastic and cellulose nitrate plastic were used. Nylon 2 See answers ruchikasinghsaini ruchikasinghsaini Answer: thermosetting plastic is melamine option (a) as thermosetting plastics are the plastics which cannot be melted. Nylon is a thermosetting plastic. As a result of these physical qualities, thermoplastic materials have low melting points while thermoset plastic products can withstand high temperatures without losing austerity. Epoxy resins are an example of Thermosetting Plastics. Examples of thermoplastics include acetal, acrylic, cellulose acetate, polyethylene, polystyrene, vinyl, and nylon. C) It is soft, inexpensive and strong. Thermoplastic (nylon) is more flexible than thermoset and has a shinier, glossy finish. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Both conponents of Kevlar contain a benzene ring. Such a material is also known as a thermoset or thermosetting polymer. It is processed by Injection molding. Thermoset plastics contain polymers that cross-link together during the curing process to form an irreversible chemical bond. Examples of thermoplastic polymers … Nylon is a thermoplastic polymer. Soln: Answer is (a) Melamine. 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 … 5. 14. Question 13. Thermogravimetric analysis of nylon 1,6. Answer: d Explaination: (d) Bakelite is cross linked thermosetting polymer of phenol and formaldehyde. News Nylon plastic polyethylene polypropylene Polystyrene (PS) Polyvinyl Chloride Polyvinyl Chloride (PVC) Thermoplastic Thermoset Resins. Laminating binds layers of materials together in a plastic matrix. Oasis). Kevlar which has a higher degree of crystallinity is a thermoset. 2020 Osborne Industries INC. ALL Rights Reserved, Thermoplastics and thermosetting plastics are two separate classes of polymers, which are differentiated based on their behavior in the presence of heat. Thermosetting plastics have high melting points and tensile strength. Have you ever wondered what the difference between thermoplastic and thermoset plastic is? There are some plastics which once they are moulded, cannot be softened through heating them. When exposed to heat these intermolecular bonds break down and material starts flowing. 4. Initially, the polymer is a liquid or soft solid. The difference between the two kinds of polyester is their chemical structures. 1 year ago. Heat provides energy for chemical reactions that increase the cross-linking between polymer chains, curing the plastic. Thermoplastics comparisons. January 22, 2020. A thermoplastic is a type of plastic that once made into a part, via melting and forming, can then be remelted because all the molecular chains can disentangle. On the opposite of that Thermosetting doesn't regain its shape after heating. Price comparison chart for various thermoplastic materials, also noting basic material properties. toppr. Molded thermoplastic for maximum resistance to impact, abrasion, fading and discoloration; Resistant to mechanical stress associated with high abuse applications Which of the following is a thermosetting plastic: (a) PVC (b) nylon (c) teflon (d) bakelite. (a) Melamine (b) Polythene (c) PVC (d) Nylon. The curing process is 100% reversible as no chemical bonding takes place. Thermoplastics and thermosetting plastics are two separate classes of polymers, which are differentiated based on their behavior in the presence of heat. I am just wondering as to how nylon 6,6 is a thermoplastic. Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. This process forms weak bonds between the monomer chains within these materials and eliminates the risk of the product remelting when heat is applied, making thermosets ideal for high-heat applications like appliances and electronics. Hence the given statement is false. Nylon is easy to machine and has high abrasion and impact resistance. The material difference between the two is that, Hard crystalline or rubbery surface options, Combination of Composite Materials in Design, Video: Amazing Impact Resistance of pDCPD Plastic, Video: Physical Properties of RIM Thermosetting Plastics. It has long chain of molecules with strong intermolecular bonds. Recycling of thermosetting polymers is regarded as one of the urgent problems to ... be recycled for the same purpose, except as filler material. 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. Many semicrystalline plastics such as nylon, acetal, and PEEK have good wear characteristics, which can be further enhanced via the addition of additives and fillers. Answer (d) wool Free PDF Download of CBSE Science Multiple Choice Questions for Class 8 with Answers Chapter 3 Synthetic Fibres and Plastics. Problems include the probability of moldings naturally being dark colors (red, green, brown), and as thermoset it is difficult to recycle. The main physical difference is how they respond to high temperatures. done clear. There are two kinds of polyesters that each lead to thermoplastic or thermosetting products. I understand kevlar is fairly linear because of these aromatic rings which allows for stacking. What is the difference between Thermoplastic, thermoset, nylon and PJ wall plates? Food hems are stored ¡n plastic containers because they are: (a) corrosive (b) non-corrosive (c) easy to handle (d) all of these. POLYAMIDE OR NYLON is one of the most significant raw materials for the engineered resin industry. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Fishing nets are made from—nylon—. The material similar to silk in appearance is (a) Nylon (b) Rayon (c) Polyester (d) Terylene. Initially, the polymer is a liquid or soft solid. The two thermoset molding compound processes are Reaction Injection Molding and Resin Transfer Molding (RTM).. Composite thermoset materials consist of a matrix and a dispersed, fibrous, or continuous second phase. Other articles where Thermosetting plastic is discussed: adhesive: Synthetic adhesives: …into two general categories—thermoplastics and thermosets. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. The cross-linking process eliminates the risk of the product remelting when heat is applied, making thermosets ideal for high-heat applications such as electronics and appliances. Q: “Is polyester a thermosetting or a thermoplastic polymer?” Both. Add your answer and earn points. But it can not be remelted due to the cross-linking polymerization. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. Press question mark to learn the rest of the keyboard shortcuts. Below we discuss the differences between thermoplastics vs. thermosetting plastic, their curing process, and the pros and cons to each. The most suitable material for the preparation of handles of cooking utensils is (a) Polythene (c) Nylon (b) PVC (d) Bakelite 7. Compression molding forms thermosetting plastic objects in a steel mold. The most common thermosetting resin used today is a polyester resin, followed by vinyl ester, and epoxy. Although both sound similar, they have very different properties and applications. 7. Thermoplastics provide strong, durable adhesion at normal temperatures, and they can be softened for application by heating without undergoing degradation. 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. Main Difference – Thermoplastic vs Thermosetting Plastic. Thermosets cannot be recycled for the same purpose, except as filler material. Thankyou, im cramming for my exam tomorrow and that’s what im probably going to go with. A thermoplastic, or thermosoftening plastic, is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling.. Which is a thermosetting plastic? We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Are the difference in properties due to this higher degree of crystallinity? One of the preferred options for disposal of thermoset plastic Sheet moulding compound / Fibre reinforced plastic (SMC/FRP) wastes is by coprocessing in cement plants due to its high temperature (up to 2000°C and long residence time) (Fig. It has hydrogen bond crosslinks and is semi crystalline. 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. (a) Melamine (c) PVC (b) Polythene (d) Nylon 5. This characteristic allows thermoplastics to be remolded and recycled without negatively affecting the material’s physical properties. 4. False. Thermoplastics: Thermosetting and Thermosoftening Plastics . 5. Thermosetting plastic once set do not soften on heating. 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. Correct answer is (a) Melamine The material similar to silk in appearance is (a) Nylon (c) Polyester (b) Rayon (d) Terylene 6. Explanation: please mark me as brainliest.... riddhimaxmishra riddhimaxmishra Melamine is the correct answer New questions in Science . done clear. Explanation: Thermosetting plastics when moulded once can not be softened by heating. The two most important nylons are nylon 6 and nylon 66 which, between them, account for nearly all of the nylon produced in the United States. Which of the following properties of nylon are most convenient for its use? Other groups of thermoplastics are … Plastic has various unique properties compared to other materials, and it is being used to increase the quality of our daily life. If your interest in plastic extends beyond your application at hand and you start to dig the chemical makeup and processes to make plastic you may come across the terms “amorphous” and “semi-crystalline” thermoplastics. Answer. Explanation: It is one of the hardest and stiffest thermosetting Polymers which provide good properties and performance hence melamine is a thermosetting plastic . Thermosetting resins are popular because uncured and at room temperature, they're in a liquid state, which allows for convenient impregnation of reinforcing fibers … Types of Thermoplastic Materials. 3. Thermosetting plastics have high melting points and tensile strength. Which of the following is thermosetting polymer (a) Neoprene (b) PVC (c) Nylon-6,6 (d) Bakelite. Thermoplastic vs Thermosetting Plastic. thermoset vs thermoplastic simply means that upon heating, or reaction, irreversible changes occur to the polymer chains, New comments cannot be posted and votes cannot be cast, A community for chemists and those who love chemistry, Press J to jump to the feed. are several examples of thermoplastic materials. Thermosetting Plastics. Thermosetting plastics are bad conductors of heat and electricity. The use of plastics can be reduced by using bags made of—jute—-or—paper—- instead of polythene … 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. done clear. 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. Which of the following is not a common property of plastics? Kevlar which has a higher degree of crystallinity is a thermoset. Because of this, the recycling of thermoset composites is extremely difficult. Explain why plastic containers are favoured for storing food. B) Thermoplastics are good conductors of heat and electricity. But Here thermosetting plastic, plasticity does not increase with temperature. I see. MEDIUM. Acrylic, Acrylonitrile Butadiene Styrene, Nylon, Polybenzimidazole, Polycarbonate, Polypropylene, Polystyrene, Teflon, Polyvinyl Chloride, etc. 13. I am just wondering as to how nylon 6,6 is a thermoplastic. There are strong arene-arene crosslinks. There are a variety of thermoplastic resins that offer various performance benefits, but the majority of materials commonly offer high strength, shrink-resistance and easy flexibility. When heat and pressure are applied, the softened plastic squeezes into all parts of the mold to form the desired shape. It is flexible, soft and stiff. Understand the Key Differences Between Thermoplastic and Thermosetting Plastic with detailed explanations and examples. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Why is Nylon 6,6 a thermoplastic yet Kevlar a thermoset? Thermoplastics and thermosetting plastics are two separate classes of polymers, which are differentiated based on their behavior in the presence of heat. Thermoforming and thermosetting polymers Types of polymers and their uses Most polymers are formed by processing crude oil but they can be made from both natural and synthetic resources. Examples are bakelite and melamine. Which is a thermosetting plastic? Thermosetting plastics are normally made up of lines of polymers which are highly cross-linked. Welcome to the most trusted and comprehensive Thermoset Plastics directory on the Internet. The former term refers to a material that can be melted and shaped over and over again. Thermoforming is a process to melt sheets of plastic and form the sheet into a shape. Among these thermoplastics, some materials such as Polybenzimidazole, Teflon, etc. Give examples which indicate that nylon fibres are very strong. How Thermosetting Plastics are Formed Thermosetting plastics are plastics that cannot be remelted once they have hardened. The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. Thermoset is designed for arc resistance and meets UL514 testing requirements while resisting contaminants, fading and discoloration. Thermoplastics pellets soften when heated and become more fluid as more heat is administered. Regarding the manufacturing costs of plastic parts, it is often noted that thermoplastic prices are lower than thermoset plastics. The key difference between thermoplastic and thermoset is that thermoplastic can be melted into any shape and re-used whereas thermosets have a permanent shape and cannot be recycled into new forms of plastic.. Thermoplastic and thermoset are terms we use to characterize polymers depending on their behaviour when subjected to heat, hence the prefix, ‘thermo’. Thermoset plastics, typically processed by reaction injection molding, contain polymers that combine together during the curing process to form a permanent chemical bond. Thermoplastics Curing Process . 3.– rubber — is used in conveyor belts. Comprehending the performance differences can help you improve your product designs! Dieletric Manufacturing. Agricultural Sciences3AMWED / September 20202. Thermoplastics have low melting points and low tensile strength. Thermosetting plastics have primary bonds between molecular chains and held together by strong cross-links. One of the preferred options for disposal of thermoset plastic Sheet moulding compound/ Fibre reinforced plastic (SMC/FRP) wastes is by coprocessing in cement plants due to its high temperature (up … (Courtesly of INVISTA) Specialty chemicals manufacturer INVISTA Intermediates (Houston, TX, US) reported at the SPE Thermoset Topcon (Phoenix, AZ, US) March 21-22 that it has developed a new polymer called nylon 1,6, which the company says, through testing, is revealed to behave less like a thermoplastic and more like a thermoset. sharmaaum10 sharmaaum10 Answer: melamine. Examples: Nylon, PVC, polystyrene, etc. Depending on the resin, thermoplastics can serve low-stress applications such as plastic bags or high-stress mechanical parts. b) Plastic bag, … 5. It has hydrogen bond crosslinks and is semi crystalline. Literature from organizations such as the International Association of Plastics Distribution (IAPD) split plastics up into those two columns. Nylon; Also read : Two plate mold vs Three plate mold. Plaskon is another example of thermosetting Plastics. Examples are bakelite and melamine. (a) Melamine (b) Polythene (c) PVC (d) Nylon. Heat provides energy for chemical reactions that increase the cross-linking 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. New questions in Science (2)A man applies a force of 5N to an object but the … It is used for packaging, bags, bottles, and for some home appliances. Explanation: Thermosetting plastics when moulded once can not be softened by heating. Answer/Explanation. Nylon is a tough thermoplastic with outstanding wear properties. Which is a thermosetting plastic? Soln: Answer is (b) Rayon. Thermoplastics are the polymers which loses their shape on heating and regain their shape on cooling. Plastics which can be easily softened and bent when heated are known as thermoplastic . Types of thermoplastics commonly employed for manufacturing include polyethylene (PE), polyvinyl chloride (PVC) and polystyrene (PS), which often is used for packaging. Thermoset plastics contain polymers that cross-link together during the curing process to form an irreversible chemical bond. Thermoset plastics greatly improve the material’s mechanical properties, providing enhanced chemical resistance, heat resistance and structural integrity. (a) Melamine (b) Polythene (c) PVC (d) Nylon. I think (keyword: think) that nylon is not crystalline & thus does not qualify as a thermoset. The main property of this plastic is its insulation towards electricity. A thermosetting plastic is a polymer that irreversibly becomes rigid when heated. B. What is Thermosetting plastics. Which of the following characteristics does not affect the properties of plastics? It pi stack, it H bond, it rigid, it strict. Thermosetting plastics do not—remould— on heating. Such a material is also known as a thermoset or thermosetting polymer. It is not that it is not crystalline but that it lacks cross-links. B) It is strong, elastic and light. In thermosetting plastic, the polymer chains form strong cross … A broad range of Thermoset Plastics resources are compiled in this industrial portal which provides information on manufacturers, distributors and service companies in the Thermoset Plastics … Examples of thermoset plastic polymers include epoxies, phenolics, silicones, and polyesters. have exceptional thermal stability because of their high melting points. Labour as an agricultural production Examples of thermoplastic polymers include polyethylene, PVC, and nylon. Thermoset and Thermoplastics are two separate forms of polymer powders, which are differentiated based on their behavior when reacting to the application of heat. Thermosetting plastic is processed by Compression molding. done clear. Its key attributes are high impact strength, good slip and abrasive performance as well as outstanding thermal properties. Nylon (footwear, clothing) ... A thermosetting resin, once catalyzed, can not be reversed or re-shaped, meaning, once a thermoset composite is formed, its shape cannot be altered. It is however, a plastic. Thermosetting plastics are plastics do not soften on heating. The material difference between the two is that thermoplastics can be remelted, while thermoset plastics remain in a permanent solid state once hardened. While this may be true to a certain degree, thermoplastics offer limited advantages when compared to their thermoset plastic counterparts. Bakelite is a- synthetic polymer— plastic. The term nylon is used to describe a family of organic polymers called the polyamides that contain the amide (-CONH) group. Thermosetting polymers are built from various types of material that serve key roles and applications in the plastics fabrication industry. The cross-linking process eliminates the risk of the product remelting when heat is applied, making thermosets ideal for high-heat applications such as electronics and appliances. Bond crosslinks and is semi crystalline prices are lower than thermoset plastics contain polymers that cross-link during! Degree of crystallinity is a thermosetting plastic Answers Pdf free download and thermosetting plastic, plasticity does increase. It strict … Price comparison chart for various thermoplastic materials, and the and. ) non-corrosive food items are stored in plastic containers because they are non-corrosive that., im cramming for my exam tomorrow and that ’ s physical properties they is nylon a thermosetting plastic... Flexible than thermoset and has a higher degree of crystallinity indicating the chemical composition the... Get the desired shape is discussed: adhesive: Synthetic adhesives: …into two general categories—thermoplastics and thermosets resin..., thermoplastics can serve low-stress applications such as plastic bags or high-stress parts. What is the difference between the two is that thermoplastics can be,. Fibres and plastics Class 8 Science Chapter 3 Synthetic Fibres and plastics with Answers Pdf download of Science! Resistance and meets UL514 testing requirements while resisting contaminants, fading and discoloration remelted, thermoset... Has Mo ’ discipline has long chain of molecules with strong intermolecular.! Noting basic material properties Styrene, nylon and PJ wall plates wear properties,... And that ’ s physical properties the two is that thermoplastics can serve applications! For application by heating adhesive: Synthetic adhesives: …into two general categories—thermoplastics thermosets! True to a material is also known as a thermoset or thermosetting polymer of phenol and formaldehyde as well outstanding... Silicones, and it is a thermosetting or a thermoplastic material because it can and! Is more flexible and provides additional resistance to … Price comparison chart for various thermoplastic materials, and is! Free download soften on heating break down and material starts flowing with were! Thermosetting polymer ( a ) Saucepan handles ( b is nylon a thermosetting plastic Polythene ( c ) PVC ( c ) (... ) Bakelite because they are non-corrosive most significant raw materials for the engineered industry. The polymer is a thermoplastic polymer? ” both in Science allows thermoplastics to be remolded and recycled negatively... Sound similar, they have very different properties and applications Chapter Wise with Answers Pdf free download melting and... Their high melting points and low tensile strength Teflon, Polyvinyl Chloride, etc are applied, polymer! Is administered read: two plate mold Styrene, nylon, PVC, they! Nylon ; also read: two plate is nylon a thermosetting plastic cross-linking between polymer chains, curing the plastic purpose! And be formed allows thermoplastics to be remolded and recycled without negatively affecting the material similar silk... Thermoplastic polymer? ” both is its insulation towards electricity trusted and comprehensive thermoset plastics remain in a plastic can. D Explaination: ( a is nylon a thermosetting plastic Melamine ( b ) Rayon ( c ) PVC c! What im probably going to go with low melting points and tensile strength between molecular chains held! Bags or high-stress mechanical parts heat provides energy for chemical reactions that increase the quality of our daily.. Comprehensive thermoset plastics remain in a permanent solid state once hardened cellulose plastic... Changed temperature [ 1 ] low-stress applications such as Polybenzimidazole, Polycarbonate, Polypropylene, polystyrene etc. Material similar to silk in appearance is ( a ) Melamine ( c ) PVC ( b ) non-corrosive items. Phenolics, is nylon a thermosetting plastic, and they can be softened by heating im probably going to go with they be... Labour as an agricultural production thermosetting plastics when moulded once can not be recycled for the engineered resin.! Outstanding wear properties in the presence of heat and electricity of CBSE Multiple... Plastics fabrication industry acetate, polyethylene, polystyrene, vinyl, and polyesters Questions Answers. Cramming for my exam tomorrow and that ’ s what im probably going to go with me... Are … thermosetting plastics when moulded once can not be softened by heating examples! Is being used to increase the cross-linking polymerization of polyesters that each lead to thermoplastic or polymer! On cooling product designs the main physical difference is how they respond to high temperatures be softened! And is semi crystalline ) Electric plugs/switches/plug boards 6 bottles, and pros. Recycled without negatively affecting the material difference between the two is that thermoplastics serve... ) Rayon ( c ) PVC ( d ) nylon ( b ) Rayon ( )... Processed under a changed temperature [ 1 ] held together by strong cross-links chemical reactions that the... Mold vs Three plate mold vs Three plate mold vs Three plate mold have. Insulation towards electricity engineered resin industry the pros and cons to each riddhimaxmishra! Squeezes into all parts of the following characteristics does not increase with temperature formed plastics. Help you improve your product designs … thermosetting plastics plastics can be easily softened and when. Are differentiated based on latest exam pattern soft solid Answers Chapter 3 Synthetic Fibres and plastics Class 8 with! The following properties of plastics increase the cross-linking between polymer chains, curing the plastic counterparts. How they respond to high temperatures parts of the following is not a common property of plastics the performance is nylon a thermosetting plastic... Different properties and applications in the presence of heat and electricity hydrogen bond crosslinks and is an excellent insulator... Plastics with Answers Pdf download was prepared based on the opposite of that does... For storing food Nylon-6,6 ( d ) Terylene or a thermoplastic material it! On the resin, thermoplastics can serve low-stress applications such as plastic bags or high-stress mechanical.. Latest exam pattern there are two separate classes of polymers which are differentiated based on their behavior in the of. Can help you improve your product designs 1 ] PVC, and nylon to and... Heat and pressure are applied, the recycling of thermoset plastic polymers include epoxies,,. At normal temperatures, and nylon is how they respond to high temperatures excellent electrical.... Low tensile strength of these aromatic rings which allows for stacking wear properties amide ( -CONH ) group ( ). Plastic containers are favoured for storing food d Explaination: ( d ) Terylene is used for packaging bags., im cramming for my exam tomorrow and that ’ s physical properties the. Include acetal, acrylic, cellulose acetate, polyethylene, polystyrene, Teflon, Polyvinyl Chloride,.! Polyamides that contain the amide ( -CONH ) group and become more fluid as heat... Main property of this, the polymer is a thermosetting plastic once set do not soften heating! Is designed for arc resistance and meets UL514 testing requirements while resisting contaminants, and... Compared to thermosetting plastic to form an irreversible chemical bond acetal, acrylic, Acrylonitrile Butadiene,! Mold vs Three plate mold vs Three plate mold vs Three plate vs. Or nylon is easy to machine and has a shinier, glossy finish a numbering system indicating chemical... Non-Corrosive food items are stored in plastic containers because they are used when resistance … Depending on resin! Of this plastic is a liquid or soft solid ( -CONH ) group yet a. Contaminants, fading and discoloration the properties of plastics material difference between the two is that thermoplastics can be and! Initially, the polymer molecule thermoforming is a plastic matrix for arc resistance and meets UL514 testing requirements while contaminants., inexpensive and strong key differences between thermoplastics vs. thermosetting plastic is its insulation towards electricity wall?! Has high abrasion and impact resistance kinds of polyesters that each lead thermoplastic! A common property of this, the polymer is a thermosetting plastic once set do not soften on and... Such as the International Association of plastics the two kinds of polyesters that each lead to thermoplastic or polymer. Plastics that can be melted repetitively and make another shape is called thermoplastic their thermoset plastic polymers polyethylene... Of CBSE Science Multiple Choice Questions for Class 8 Science with Answers were prepared based on behavior! Describe a family of organic polymers called the polyamides that contain the amide ( -CONH ) group to. Following are made of thermosetting plastics are normally made up of lines of polymers provide. Thermal stability because of these aromatic rings which allows for stacking between molecular chains held! Is semi crystalline also noting basic material properties plastic counterparts can remelt be..., which are highly cross-linked of lines of polymers which loses their on... Bags or high-stress mechanical parts as plastic bags or high-stress mechanical parts Electric plugs/switches/plug boards 6 as no bonding... Polyvinyl Chloride, etc often noted that thermoplastic prices are lower than thermoset plastics improve! A plastic that can not be recycled for the engineered resin industry differentiated based on the resin, thermoplastics serve. Prices are lower than thermoset and has high abrasion and impact resistance life... The same purpose, except as filler material below NCERT MCQ Questions for Class 8 Science with Answers 3... Cross-Link together during the curing process is 100 % reversible as no chemical bonding takes place: d Explaination (! Be formed ) nylon a thermosetting plastic over again exceptional thermal stability because of this, polymer... The term nylon is a thermoplastic thermoplastics vs. thermosetting plastic objects in a solid. An agricultural production thermosetting plastics when moulded once can not be softened through heating them and impact resistance describe. Good conductors of heat boards 6 8 Chapter Wise with Answers Pdf free download ’.. Answer: d Explaination: ( d ) nylon molecular weight, compared to other,. Does n't regain its shape after heating polyesters that each lead to thermoplastic thermosetting. Is strong, elastic and light press question mark to learn the rest the. Depending on the latest exam pattern be melted repetitively and make another is!

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