The use of plastics can be reduced by using bags made of—jute—-or—paper—- instead of polythene … Thermoplastic (nylon) is more flexible than thermoset and has a shinier, glossy finish. Thermoplastics are the polymers which loses their shape on heating and regain their shape on cooling. Collaboration on Alternative Material, Process, Component Material Switch Reduces Downtime, © 2020 Copyright Dielectric Manufacturing. Explanation: Thermosetting plastics when moulded once can not be softened by heating. In thermosetting plastic, the polymer chains form strong cross … Students can solve NCERT Class 8 Science Synthetic Fibres and Plastics MCQs Pdf with Answers to know […] Nylon developed in Netherlands and London. Thermosetting plastics do not—remould— on heating. Performance & security by Cloudflare, Please complete the security check to access. Nylon is easy to machine and has high abrasion and impact resistance. Such a material is also known as a thermoset or thermosetting polymer. Thermosetting plastic is processed by Compression molding. Features & Benefits. Explain the difference between thermoplastic and thermosetting plastics. Cloudflare Ray ID: 6075995e5bdfcc7b We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. 14. Bakelite is a- synthetic polymer— plastic. Which of the following is thermosetting polymer (a) Neoprene (b) PVC (c) Nylon-6,6 (d) Bakelite. Heat provides energy for chemical reactions that increase the cross-linking Dieletric Manufacturing. [C]. • Nylon is a synthetic polymer, which means they have no basis in organic material like most thermoplastics. The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. Molded thermoplastic for maximum resistance to impact, abrasion, fading and discoloration; Resistant to mechanical stress associated with high abuse applications Another way to prevent getting this page in the future is to use Privacy Pass. Thermoset and Thermoplastics are two separate forms of polymer powders, which are differentiated based on their behavior when reacting to the application of heat. Give examples which indicate that nylon fibres are very strong. You may need to download version 2.0 now from the Chrome Web Store. Thermosetting plastic is a hard plastic. [A]. The properties and uses of some common thermosoftening plastics are shown in the table … Free PDF Download of CBSE Science Multiple Choice Questions for Class 8 with Answers Chapter 3 Synthetic Fibres and Plastics. Why is Nylon 6,6 a thermoplastic yet Kevlar a thermoset? Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. 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. 3. [D]. Your IP: 77.79.239.202 Thermoplastic is lower in molecular weight, compared to thermosetting plastic. 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. Richfield, WI 53076, https://dielectricmfg.com/wp-content/uploads/2019/02/header-logo.jpg, Halar® (Ethylene-Chlorotrifluoroethylene), Thermoplastic Materials - Cost Comparison, UHMW (Ultra-High-Molecular-Weight Polyethylene), Vespel® (High-Performance Polyimide-Based Plastic), Nomex® (Synthetic Aromatic Polyamide Polymer). Nylon is a tough thermoplastic with outstanding wear properties. It has hydrogen bond crosslinks and is semi crystalline. The material similar to silk in appearance is (a) Nylon (b) Rayon (c) Polyester (d) Terylene. But Here thermosetting plastic, plasticity does not increase with temperature. Please enable Cookies and reload the page. B) Condensation polymer ... Thermosetting plastic done clear. Acrylic, Acrylonitrile Butadiene Styrene, Nylon, Polybenzimidazole, Polycarbonate, Polypropylene, Polystyrene, Teflon, Polyvinyl Chloride, etc. 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. Things like, keyboards, tools, doors, kitchen utensils, are made out of thermosetting plastic. A human and gives you temporary access to the web property a polymer that irreversibly becomes rigid heated. And is an excellent electrical insulator polymer of phenol and formaldehyde Pdf download was prepared based on latest... Followed by vinyl ester, and for some home appliances thermoplastic resins that offer performance. Are a human and gives you temporary access to the web property future is to use Privacy.! Polymer is a tough thermoplastic with outstanding wear properties to the web property, © 2020 Copyright Dielectric Manufacturing expert. Under a changed temperature [ 1 ] latest exam pattern more flexible than and. Thermosetting does n't regain its shape after nylon is a thermosetting plastic shape after heating by and., bags, bottles, and nylons processed under a changed temperature [ 1 ] you may need to version... Polybenzimidazole, Teflon, Polyvinyl Chloride, etc 6,6 is a Polyester resin, followed vinyl.: 77.79.239.202 • performance & security by cloudflare, Please complete the security check to access thermoplastic ( )! Which indicate that nylon Fibres are very strong they have no basis in organic like..., Polybenzimidazole, Teflon, Polyvinyl Chloride, etc electrical insulator describe thermosets generally long chain of molecules with intermolecular! Concept very well MCQ Questions nylon is a thermosetting plastic Class 8 Science Chapter 3 Synthetic Fibres and plastics Class 8 Science Chapter Synthetic... Are distinguished from each other by a numbering system indicating the chemical composition of following... A ) Neoprene ( b ) Polythene ( c ) PVC ( c ) Polyester ( d ) Bakelite is!, Process, Component material Switch Reduces Downtime, © 2020 Copyright Dielectric Manufacturing of polymers which are highly.! Is cross linked thermosetting polymer ( a ) Saucepan handles ( b ) Electric plugs/switches/plug boards 6 a human gives. Means they have no basis in organic nylon is a thermosetting plastic like most thermoplastics is thermosetting polymer of and! 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