Some examples of sporting venues using PVC for their roopfing membranes are shown below. _____ is an example of fibre reinforced plastic.        3.12 Lucricants Improves flow properties of the material. Question 13. On behalf of the European Commission, and as part of a full review of PVC, PE Europe Consulting Group together with the University of Stuttgart undertook a Life Cycle Assessment of PVC and of Principal Competing Materials. PVC (polyvinylchloride) -a cheaper plastic used for window frames and pipes. State True or False: Polymers the small units used in making synthetic fibers. We will discuss engineering economics in Chapter 20. Play this game to review Chemistry. The report can be downloaded from the Europa website. Stereo specific polymers are obtained by _____ polymerization. For more information, please visit www.vinylplus.eu. 7. The BPF has a dedicated Additives Group, as well as a Masterbatch and Technical compounds Group. Explain why thermoplastic polymers have different properties to thermosetting polymers. As PVC is a highly versatile construction material with a favourable environmental footprint it is extensively used in the construction of sporting venues. This includes use in seating, roofings, floorings as well as piping and electrical wiring. Answer: True. _____ is an example of fibre reinforced plastic. Thermosetting plastics contain polymers that cross-link together during the curing process to form an irreversible chemical bond. PVC (polyvinylchloride) -a cheaper plastic used for window frames and pipes. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. A lot of plastic pollutes our environment.    5.5 Sport The study concluds that not only does PVC provide decisive cost advantages due to its low initial purchase price but also in its low cost of ownership throughout the life of the product. : Elastomers can be formed in the same way as thermosetting plastics. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. 4. Answer 1 Cut the PVC coating in a manner that the die will remove the coating in small pieces. For further information, please visit, www.recofloor.org/. Products and bi-products of PVC manufacture include Chlorine and Caustic Soda, two of perhaps the most important manufacturing "ingredients" not only for PVC manufacture, but many other applications. What is the full form of PVC? The European PVC Industry's ten-year Voluntary Committment to Sustainable Development, know as Vinyl2010, made exceptional progress in waste management, recycling and the responsible use of additives. Justify each choice. Examples of thermoplastics that are common in engineering include: ABS (acrylonitrile butadiene styrene)- stiff and light, used in vehicle bodywork . Answer 21. HMW phthalates are safely used in many everyday including cables and flooring. The PVC industry is also setting a unique example in the process of working together as a supply chain in driving forward sustainable development. polycarbonate - used to make strong, transparent panels and vehicle lights. They include everything from lifesaving medical devices such as medical tubing and blood bags, to footwear, electrical cables, packaging, stationery, and toys. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Typical examples of PVC healthcare products include: Flexible PVC is used to make blood storage bags, and in fact is the only material approved by the European Pharmacopoeia for this purpose. The trade name of polymethylmethacrylate is _____ 8. Refuse (avoid) is the best way to manage plastic. Further information on PVC-U windows can be found via our Windows Group homepage, www.bpfwindowsgroup.co.uk. Thermoset Curing Process Thermoset plastics contain polymers that cross-link together during the curing process to form an irreversible chemical bond. 3. 73. False. The material now accounts for about 20% of all plastic manufactured world-wide, second only to polyethlene. Pvc is a thermosetting plastic say true or false Get the answers you need, now! 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. Reduce static charge build up. Urea is an excellent nitrogenous direr which contains nitrogen about: a) 36% b) 47% c) 80 % d) 60% 4. 22. 2 Physical Properties Categorise the materials of the following products into 'can be recycled' and 'cannot be recycled'. Explain why plastic containers are favoured for storing food. Examples are bakelite and melamine. Pencil or bevel cut the PVC coating at the end of the conduit. Solution for What are the differences between thermosetting and thermoplastic polymers ? Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. 1 Basketball court. Caustic Soda too has many key, everyday applications, including the following applications: pulp and paper manufacture, soap and surfactant manufacture, detergents and cleaners, aluminia extraction, textiles and in the food industry. Hence these plastics cannot be reprocessed and they can maintain their shape and size even at very high temperatures. Pencil or bevel cut the PVC coating at the end of the conduit. PVC's strong, lightweight, durable and versatile characteristics make it ideal for window profiles. When you are studying polymers in chemistry you will generally come across a typical question like “distinguish between or write the differences between thermoplastic and thermosetting plastic.” While thermoset plastics and thermoplastics sound very similar, they are totally different compounds and have different properties as well as applications. Ask your question. Are the statements true or false when threading a piece of PVC-coated conduit? Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches. The functional additives used in all PVC materials include heat stabilisers, lubricants, and in the case of flexible PVC, plasticisers. PVC's contribution is by no means limited to its products. PVC-U windows are one of the best performing products on the market today. 73. Heat stabilisers are necessary in all PVC formulations to prevent the decomposition of the PVC by heat and shear during processing. Thermosetting plastics cannot be softened on heating, therefore they cannot be moulded and reshaped. Log in. Optional additives include processing aids, impact modifiers, fillers, nitrile rubbers, pigments and colorants and Flame Retardants. Q. Thermosetting Plastics. The plastic used for making optical lenses is _____ 6. An example of a primary package is the shrink sleeve around a 24 pack of water bottles. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern.    6.4  Total Cost of Ownership Study Polyvinyl Chloride (PVC) is one of the most widely used polymers in the world. PVC's compatibility with many different kinds of additives is one of the materials many strengths and is what makes it such a highly versatile polymer. Thermoplastics on heating get deformed (its shape and size can be altered) and thus can also be bent. There are a wide variety of thermoset plastics, some of which rely on their heat resistant properties more than others. True or False : Question 1. 5. Many of the PVC products we use everyday but tend to take for granted contain phthalate plasticisers. RecoMed is a PVC take-back scheme currently being implemented at 7 different NHS hospitals across Britain (as of March 2016). Can you write the major difference between these two types of plastics? Typical example of PVC construction products include: Unplasticised PVC is one of the stiffest polymers at normal ambient temperature and shows little deterioration after many years in service. This investment has meant that not just prodcution off-cuts are recycled but also products such as doors and PVC-U windows are recycled on a huge global scale. 4 Benefits of PVC Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. The figure shows the different molecular structures of a thermoplastic and a thermoset. More information can be found at www.bpfpipesgroup.com.    5.2 Healthcare State True or False: Thermoplastic can be softened on heating and moulded repeatedly. Polymers … Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. A polymerisation in which two or more different monomers takes part is called _____ 7. Join now. Define the additive: Plasticiser. Eco-profiles of PVC were updated in 2006 and can be downloaded from the PlasticsEurope Eco-profiles webpages. The first patent for a polymerisation process to manufacture PVC was granted to German inventor Friedrich Klatte in 1913 and PVC has been in commercial production since 1933. PVC's inherent flame retardant and excellent electrical insulation properties make it ideal for cabling applications. The blending of PVC polymer with other materials to produce different formulations providing a wide range of physical properties. Which one of these plastics is a thermosetting plastic? 2M 74. A) PVC B) Polythene C) Bakelite D) None of these 19. Thermoplastics are known for their high molecular weight because intermolecular interactions increase as the plastic is cooled. Case Study: The World's First 100 percent Recycled PVC Windows, 6.23 Examples of Some Current Recycling Schemes for PVC. © Copyright British Plastics Federation 2020. ; window frames, drainage pipe, water service pipe, medical devices, blood storage bags, cable and wire insulation, resilient flooring, roofing membranes, stationary, automotive interiors and seat coverings, fashion and footwear, packaging, cling film, credit cards, vinyl records, synthetic leather and other coated fabrics. Thermosetting plastics, also called . Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. 2. The scheme accepts uplifted vinyl flooring and post-installation off-cuts. 6.3  Eco-profiles & Life Cycle Assessment. They are often soft, flexible plastics. Question 3. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Give examples which indicate that nylon fibres are very strong.    6.1  Environmental Impacts Basil Hamed. 2) Thermoplastics can be bent easily.    6.2  Recycling of PVC Some examples are bakelite, melamine, formica, etc. Eco-profiles provide environmental analysis for a product from 'cradle-to-gate' (as opposed to the 'cradle-to-grave' approach of Life Cycle Assessment). PVC  was first used as cable insulation as a replacement for rubber during the Second World War and continues to be used widely to this day due to its flexibility, ease of handling in installation and inherent flame retardation. 2. Define the additive: Anti-static agents. A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. 5. Picture: Kind permission of Base Structures Ltd. 3. They can be melted again and again. Why does PVC (polyvinyl chloride) have different properties from polyethene? SURVEY . These optional additives are not strictly necessary for the integrity of the plastic but are used to draw-upon other properties. PVC has excellent electrical insulation properties, making it ideal for cabling applications. In plastic small organic molecules combine together to form higher molecular weight structures. Materials that compete with PVC are often promoted as a more natural choice, indeed, ‘natural’ does not equate to ‘better’ or ‘more sustainable'. True or False : Question 1. Give some examples of thermosetting plastics. Question 3. 6. false, false, true, true, true. Polymers are This quiz is incomplete! They can withstand relatively high temperatures. Answer: True.    1.1  Raw Materials Other examples of PVC healthcare products: "Artificial skin" in emergency burns treatment, blood and plasma transfusion sets, blood vessels for artificial kidneys, catheters, blood bags, containers for intravenous solution giving sets, container for urine continence and ostomy products, endotracheal tubing, feeding and pressure monitoring tubing, inhalation masks, surgical and examination gloves, shatter-proof bottles and jars, mattress and bedding covers and blister and dosage packs for pharmaceuticals and medicines. As with most recycling streams, sorting is of the utmost importance to achieve optimal recycling of PVC materials. Can you write the major difference between these two types of plastics? PVC is versitile and can be used for different colours and effects, often being used as an alternative to traditional wood frames as they offer tremendous energy-saving potential at low cost. Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. To melt them you would need to break covalent bonds. Thermosetting Plastic Advantages and Disadvantages. 6  PVC and Sustainability 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. 1. Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. 8 Further reading. 3) Examples are polythene and polyvinyl chloride. PVC has chlorine atoms, meaning PVCs can have dipole-dipole forces . Question 4. 2M 74. Play this game to review English. Initially, the polymer is a liquid or soft solid. Give some examples of thermosetting plastics. Give two examples of thermosetting plastics. Thermoplastics. *Response times vary by subject and question complexity. Question 16. In Blown Film Manufacturing. They are easily molded and extruded into films, fibers and packaging. A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic. Thermoplastics become moldable above a specific temperature and then return back to a solid when cooled. The Recofloor scheme, managed by Axion Consulting Ltd, provides a mechanism for waste vinyl flooring to be collected and recycled. The plastic used for making optical lenses is _____ 6. "Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs.". Page No 44: Question 12: Give scientific reasons for the following: (a) Plastic containers used for microwave cooking can be made of thermosetting plastic.    5.3 Electronics 7 Useful Links Common Uses for Thermoset Plastics. Heat is not necessarily to be applied externally. Bakelite is an example of thermosetting plastics.    1.2  Bi-Products 3.11 Heat stabilisers  Another word for Elastomer? The main physical difference is how they respond to high temperatures. Independent research by Mavel Consultants has shown that the typical cost of using alternative materials is in a range 20-100% higher per component. The trade name of polymethylmethacrylate is _____ 8. Urea is an excellent nitrogenous direr which contains nitrogen about: a) 36% b) 47% c) 80 % d) 60% 4. In 2011, the European Council of Vinyl Manufacturers (ECVM) commissioned an independent company to undertake a study on the Total Cost of Ownership (TCO) of PVC products. PVC packaging is also widely used in the packaging of pharmaceutical products. In addition to being heat resistant, thermoset plastics also have a highly flexible design, good dimensional stability, and are much more cost-effective than thermoplastics. 1 Production A) true B) false 17. LSR TPE. Thermosetting plastics cannot be bent as they break when forced to bend. steel, concrete and sealants) which need to be removed before re-processing. Some examples of Thermoplastics are – Polythene and PVC. Another word for Elastomer? Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. Its compatibility with additives allows for the possible addition of flame retardants although PVC is intrinsically fire retardant because of the presence of chlorine in the polymer matrix. There are many definitions of Sustainability and Sustainable Development, but it can best be defined by the three main pillars of sustainability; social, economic and environmental. … Explain why plastic containers are favoured for storing food. This process is called compounding. False. Chlorine is used in the manufacture of life-saving medication, indeed 85% of all pharmaceuticals. 4. It is good to wear clothes made of synthetic fibres while cooking. 7. A polymerisation in which two or more different monomers takes part is called _____ 7.    5.1 Construction PVC is a versatile material that offers many possible applications, these include; window frames, drainage pipe, water service pipe, medical devices, blood storage bags, cable and wire insulation, resilient flooring, roofing membranes, stationary, automotive interiors and seat coverings, fashion and footwear, packaging, cling film, credit cards, vinyl records, synthetic leather and other coated fabrics. These include: DINP, DIDP, DPHP, DIUP and DTDP. These are used for manufacturing toys, combs, cargrills and various types of containers. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. performance sports surfaces, sports equipment, clothing, protective barriers, matting, wiring and piping infrastructure. Play this game to review Chemistry. 4 false‐The tests check that the plastic does not stretch ‐an elastomer would stretch significantly. The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1].    3.1 Functional Additives The essential raw materials for PVC are derived from salt and oil. Some competing materials claim environmental and sustainability advantages over PVC – this is usually based either on myths about the environmental impact of PVC or unjustifiably biased opinions about the competing materials. Answer: True. Question 4. Give 2 elastomers. Some main advantages of thermosetting plastics include – they are more resistant to high temperatures, they have high levels of dimensional stability, are cost-effective, and allow highly flexible design. Five key challenges have been identified as priorities according to The Natural Step system conditions for a sustainable society: The Natural Step Framework is an internationally recognised method for sustainability planning that integrates the science of sustainability with business decision-making. Performance & security by Cloudflare, Please complete the security check to access. Explain the difference between thermoplastic and thermosetting plastics. High Phthalates: High molecular weight (HMW) phthalates are those with 7 - 13 carbon atoms in their chemical backbone. True or false? These are used to reduce friction during processing. Question 15. Visually speaking, thermoplastic chains are clumped together like a ball of tangled yarn. FALSE, Thermoplastics. Why does PVC (polyvinyl chloride) have different properties from polyethene? For further information on PVC, please visit www.pvcexplained.co.uk, The extraction of salt and hydrocarbon resources, The production of ethylene and chlorine from these resources, The combination of chlorine and ethylene to make the vinyl chloride monomer (VCM), The polymerisation of VCM to make poly-vinyl-chloride (PVC). Question 13. Branched chain. Thermoplasticis a plastic which gets deformed easily on heating and can be bent easily e.g., Polythene and PVC. Median response time is 34 minutes and may be longer for new subjects. Decide whether the following statements about thermosetting plastics are true or false. PVC and polyethylene are examples of thermoplastics. Elastomers. 3.12 Lubricants 2. Thermosetting polymers have covalent bonds. The recycled flooring can be used in the manufacture of new flooring or to produce traffic management products such as traffic cones and road sign bases. 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. Once formed, it can be heated and reformed over and over again What … Due to its versatile nature, PVC is used extensively across a broad range of  industrial, technical and everyday applications including widespread use in building, transport, packaging, electrical/electronic and healthcare applications. The choice of heat stabiliser depends on a number of factors including the technical requirements of the PVC product, regulatory approval requirements and cost. Can be deformed a large amount when a force is applied and can return to their original shape when released. 3 PVC and Additives PVC is a very durable and long lasting material which can be used in a variety of applications, either rigid or flexible, white or black and a wide range of colours in between. Chemistry Questions & Answers for Bank Exams : Which of the following is an example of thermosetting plastic? Give two examples of thermosetting plastics.        3.13 Plasticisers Choose the correct answer: Example of thermosetting plastic is . Question 16. 3. Low Phthalates: Low molecular weight (LMW) phthalates contain eight or less carbon atoms in their chemical backbone. A plasticiser is a substance which when added to a material, usually a plastic, makes it flexible, resilient and easier to handle. • PVC takes less non-renewable fossil fuel to make than any other commodity plastic because unlike other thermoplastics which are entirely derived from oil, PVC is manufactured from two starting materials; 57% of the molecular weight derived from common salt, 43% derived from hyrdocarbon feedstocks (increasingly ethylene from sugar crops is also being used for PVC production as an alternative to ethylene from oil or natural gas), There are over 50 quadrillion tonnes of salt exist dissolved in the sea, with over 200billion tonnes of salt available underground - reserves of this material are clearly abundant, Ethylene from oil equates to 0.3% of annual oil usage, but increasingly etheylene from sugar crops is also being used for PVC production. 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. Optional additives, include a range of substances from processing aids, impact modifiers, thermal modifiers, UV stabilisers, flame retardants, mineral fillers, pigments, to biocides, and blowing agents for specific applications. Polyethylene, Polypropylene And Polyvinyl Chloride (PVC) Are The Main Example Of Thermosetting Polymers. The Building Research Establishment (BRE), the UK's leading authority on sustainable construction, has granted PVC-U windows a life-span of more than 35 years however, there are many examples of products lasting much longer than this. Synthetic PVC and XLPE materials which have been cross-linked to make them thermoset materials also have enhanced resistance to temperature, improved dielectric strengths and resistances to certain chemicals. It is good to wear clothes made of synthetic fibres while cooking. Examples of thermoplastics include polythene (PE), polypropylene (PP), polyvinyl chloride … Answer: True. Explain the difference between thermoplastic and thermosetting plastics. What is the full form of PVC? Tetìlon is used to make non-stick utensils. PVC  was first used as cable insulation as a replacement for rubber during the Second World War and continues to be used widely to this day due to its flexibility, ease of handling in installation and inherent flame retardation. Continuous chain. PVC has chlorine atoms, meaning PVCs can have dipole-dipole forces . Answer: Bakelite and melamine. What is 4R’s? The study focussed on three particular applications; windows, flooring and outdoor pipes, utilising data from Germany and Italy (judged to be a fair representation of conditions in north and south European countries). To play this quiz, please finish editing it. 5 true 6 false‐Material is melted down and reused, something not possible with thermosetting plastics.    6.5 Voluntary Committment to Sustainable Development (VinylPlus) Picture: Kind permission of Bruce Sutherland, City of Capetown/PVCplus. 5. Automotive applications: Instrument panels and associated mouldings, interior door panels and pockets, sun visors, seat coverings, headlining, seals, mud flaps, underbody coating, floor coverings, exterior side moulding and protective strips and anti-stone damage protection. A Total Cost of Ownership study takes into account all costs associated with a product over its entire life cycle. Picture: Kind permission of ECVM. PVC can be plasticised to make it flexible for use in flooring and medical products. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. PVC (polyvinylchloride) -a cheaper plastic used for window frames and pipes. FALSE, Thermoplastics. 3. Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst. 21. 1.2 Bi-Products The long, individual polymer chains of the plastic become cross-linked by smaller molecules (shown as smaller red lines in Figure 2). The use of these phthalates in Europe is limited to certain specialised applications. Thermoset plastics are often used for sealed products due to their resistance to deformation. Features & Benefits. Due to its properties it reprocesses well and can be recycled into second (or third life) applications with ease. They are used to make carrier bags. State whether the followings statements are True or False: The components obtained by plastic are eco friendly. (a) Melamine (b) Polythene (c) PVC (d) Nylon Soln: Answer is (a) Melamine Explanation: Thermosetting plastics when moulded once can not be softened by heating. 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