PVC-U windows, in a domestic setting, score an "A" rating and in the commercial arena, an "A+" rating - the best there is! Explain the difference between thermoplastic and thermosetting plastics. 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. Define the additive: Plasticiser. The trade name of polymethylmethacrylate is _____ 8. 6. false, false, true, true, true. Page No 44: Question 12: Give scientific reasons for the following: (a) Plastic containers used for microwave cooking can be made of thermosetting plastic. Volksparkstadion roof, Hamburg. performance sports surfaces, sports equipment, clothing, protective barriers, matting, wiring and piping infrastructure. Typical examples of PVC automotive components include: PVC brings both high performance qualities and important cost benefits to the automotive industry. : Elastomers can be formed in the same way as thermosetting plastics.    2.1 Resistance to Chemicals Give examples which indicate that nylon fibres are very strong.    3.1 Functional Additives The use of these phthalates in Europe is limited to certain specialised applications. Please enable Cookies and reload the page. A) true B) false 17. They can be melted again and again. 5 Applications 3. A) PVC B) Polythene C) Bakelite D) None of these 19. Synthetic 22. What is the full form of PVC? 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. Which type of chain would be found in a thermosetting plastic? Some other examples of thermoset plastic polymers include silicones, vulcanized rubber, epoxies, polyesters and phenolics. Window and door profiles, conservatories and atria, Power, data and telecoms wiring and cables, Roofing and ceiling systems and membranes. Some examples are bakelite, melamine, formica, etc. True False 39. 1. 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. 5 true 6 false‐Material is melted down and reused, something not possible with thermosetting plastics. Examples of thermoplastics that are common in engineering include: ABS (acrylonitrile butadiene styrene)- stiff and light, used in vehicle bodywork . These are used for manufacturing toys, combs, cargrills and various types of containers. 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. Can be deformed a large amount when a force is applied and can return to their original shape when released. The plastic used for making optical lenses is _____ 6. To play this quiz, please finish editing it. The long, individual polymer chains of the plastic become cross-linked by smaller molecules (shown as smaller red lines in Figure 2). These are the types of polymers that melt on heating and solidify on cooling. The British Fenestration Ratings Council (BFRC) also grades materials on their energy effiency, PVC-U frames - compared to the listed Aluminium and Timber options - score many 'A' ratings, marking their superior energy performance. 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. • Answer 1 Cut the PVC coating in a manner that the die will remove the coating in small pieces. PVC has chlorine atoms, meaning PVCs can have dipole-dipole forces . We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. The plastic used for making optical lenses is _____ 6. Can be deformed a large amount when a force is applied and can return to their original shape when released. Coupled together with the variety of colours available (from a variety of manufacturers), the inherant recyclability of PVC, minimal maintenance (regular cleaning required) and their ease of repair, should anything go wrong, PVC-U Windows offer great advantages over competing materials. Thermoplastics. 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. Some examples of Thermoplastics are – Polythene and PVC. 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. Basil Hamed. 2M 74. Answer 2 Grind the PVC coating to 5 mil before treading. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Why does PVC (polyvinyl chloride) have different properties from polyethene? They are often soft, flexible plastics. Thermosetting plastics, also called . 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. Explain why thermoplastic polymers have different properties to thermosetting polymers. PVC has been used for hundreds of life-saving and healthcare products for almost 50 years being used in surgery, pharmaceuticals, drug delivery and medical packaging due to its unrivalled performance characteristics and cost-efficiency. Thermosetting plastic are not used to make - 22449051 1. Urea is an excellent nitrogenous direr which contains nitrogen about: a) 36% b) 47% c) 80 % d) 60% 4. Elastomers can be formed in the same way as thermoplastics.    5.4 Automotive Such a material is also known as a thermoset or thermosetting polymer. 5. Differentiate between the thermoplastic an d thermosetting plastics. Elastomers. Answer: 4R’s stands for Redue, Reuse, Recycle and Recover. Initially, the polymer is a liquid or soft solid. 4. Elastomers. Basil Hamed. Join now. Thermosetting polymers have covalent bonds. Another word for Elastomer? 8 Further reading. PVC has been used extensively in a wide range of construction products for over half a century. Answer: True.    6.2  Recycling of PVC Categorise the materials of the following products into 'can be recycled' and 'cannot be recycled'. It is good to wear clothes made of synthetic fibres while cooking. 73. 3. 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. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. Your IP: 37.187.30.118 Since the 90's , the European PVC Industry has been working hard to embrace its responsibility to the challenge of sustainable development. More information on the role of PVC in sport can be found at www.pvcinsport.co.uk, PVC is widely used in coated fabrics applications, this includes use in emergency shelters to help people at times of disaster. What is 4R’s? Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches. Question 3. There are a wide variety of thermoset plastics, some of which rely on their heat resistant properties more than others. A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic.    1.1  Raw Materials polycarbonate - used to make strong, transparent panels and vehicle lights. Explain why thermoplastic polymers have different properties to thermosetting polymers. Other construction applications: door profiles, pipes and fittings, power, data and telecoms wiring and cables, cable and services ducting, internal and external cladding, conservatories and atria, roofing and ceiling systems and membranes, rainwater, flooring and wallcoverings. Pencil or bevel cut the PVC coating at the end of the conduit. The most commonly and widely used nitrogenous fertilizer in Pakistan is: a) Nitrolin b) Urea c) Ammonium Sulphate d) Ammonium Nitrate … These additives can influence or determine a number of the products properties, namely; its mechanical properties, weather fastness, its colour and clarity and indeed whether it is to be used in a flexible application. 3.13 Plasticisers. LSR TPE. This process is called compounding. 5. Decide whether the following statements about thermosetting plastics are true or false. With around 1500 hospitals in the UK, estimates put the total tonnage of PVC waste at over 2,000 tonnes per annum. 22. In 1-2 sentences, please explain one of the approaches to solving the water solubility problem of packaging liquids in paper from the article "Paper is Pressing Forward." Can you write the major difference between these two types of plastics? 7. 2M 75. 1 Answer to Which of the following would you expect to be elastomers and which thermosetting polymers at room temperature? Improves flow properties of the material. Answer: True. 3.11 Heat stabilisers  FALSE, Thermoplastics. 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. If All Other Operation Parameters Remain The Same, How Can Increasing The Melt Temperature Ymer Affect The Location Of The Frostine A For The The Butts Away From The 40. True or false? … Independent research by Mavel Consultants has shown that the typical cost of using alternative materials is in a range 20-100% higher per component. Bakelite is an example of thermosetting plastics. Heat provides energy for chemical reactions that increase the cross-linking Question 14.    5.3 Electronics With high clarity and excellent organoleptic properties (no transfer of taint to food) it is equally suited for use in short term applications such as specialised packaging.        3.11 Heat Stablisers 2M 74. Whilst old windows are recycled, the process is far more complex that off-cuts due to contamination such as building debris (e.g. 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. More information can be found at www.bpfpipesgroup.com. True or False: Thermosetting plastics can be reheated and formed into new materials. 5. The terms thermoplastic and thermoset stand for how a material is or can be processed under a changed temperature [1]. Play this game to review English. Features & Benefits. A polymerisation in which two or more different monomers takes part is called _____ 7. Answer: Polythene and polyvinyl chloride. What … Thermoplastics become moldable above a specific temperature and then return back to a solid when cooled. answer choices . To melt them you would need to break covalent bonds. 5. A Total Cost of Ownership study takes into account all costs associated with a product over its entire life cycle. What is 4R’s? Question 16. Materials that compete with PVC are often promoted as a more natural choice, indeed, ‘natural’ does not equate to ‘better’ or ‘more sustainable'. Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. These include, DEHP, DBP, DIBP and BBP. Rubber. steel, concrete and sealants) which need to be removed before re-processing. Median response time is 34 minutes and may be longer for new subjects. 4 Benefits of PVC Require heat to make them formable and when cooled they maintain the shape they were formed in to. Examples of thermoset types include rubber insulations such as silicone rubbers and EVA (Ethylene-Vinyl Acetate).. PE and PVC may also be cross-linked making them thermosetting types.     3.2 Optional Additives Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. 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. Which one of these plastics is a thermosetting plastic? PVC has excellent electrical insulation properties, making it ideal for cabling applications. 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).    5.6 Coated Fabrics Answer 21. Picture: Kind permission of Base Structures Ltd. 3. A lot of plastic pollutes our environment. Give 2 elastomers. Polyvinyl chloride (PVC) is considered a thermoplastic. Cape Town World Cup 2010 Stadium. Log in. Gottlieb Daimler Stadion roof, Stuttgart. Continuous chain. Some examples of sporting venues using PVC for their roopfing membranes are shown below. Thermoplastics can soften upon heating and return to their original form on cooling. The essential raw materials for PVC are derived from salt and oil. The PVC industry is also setting a unique example in the process of working together as a supply chain in driving forward sustainable development. On the other hand, thermosetting plastics cannot be bent once moulded. 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. 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. 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. Examples of thermoplastics that are common in engineering include: ... 1 true 2 true 3 false ‐The plastic is solid. 2. Ungraded . Acrosss the world, the PVC industry has invested heavily to develop sophisticated recycling schemes to ensure that large amounts of PVC can be reused in a new generation of advanced energy efficient, sustainable products. Answer: Bakelite and melamine. 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). Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. 1. Question 2. PVC (polyvinylchloride) -a cheaper plastic used for window frames and pipes. Reduce static charge build up. Thermoset Curing Process Thermoset plastics contain polymers that cross-link together during the curing process to form an irreversible chemical bond. 45 seconds . PVC's contribution is by no means limited to its products. State whether the followings statements are True or False: The components obtained by plastic are eco friendly. polycarbonate - used to make strong, transparent panels and vehicle lights. Speciality plasticisers, such as adipates, citrates, benzoates and trimeliltates are used where special physical properties are required such as the ability to withstand very low temperatures or where increased flexibility is important. As PVC is a highly versatile construction material with a favourable environmental footprint it is extensively used in the construction of sporting venues. As with most recycling streams, sorting is of the utmost importance to achieve optimal recycling of PVC materials. They are used for electrical plugs and sockets. High Phthalates: High molecular weight (HMW) phthalates are those with 7 - 13 carbon atoms in their chemical backbone.        3.13 Plasticisers To play this quiz, please finish editing it. Urea is an excellent nitrogenous direr which contains nitrogen about: a) 36% b) 47% c) 80 % d) 60% 4. Some examples are polythene, polyvinyl chloride (PVC), polystyrene, teflon, etc. 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. 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. Thermosetting Plastics:There are some plastics which when … Eco-profiles provide environmental analysis for a product from 'cradle-to-gate' (as opposed to the 'cradle-to-grave' approach of Life Cycle Assessment). Contents 1 Production 1.1 Raw Materials 1.2 Bi-Products 2 Physical Properties 2.1 Resistance to Chemicals 3 PVC and Additives 3.1 Functional Additives 3.11 Heat Stablisers 3.12 Lucricants 3.13 Plasticisers 3.2 Optional Additives 4 Benefits of PVC 5 Applications 5.1 Construction … Source: Software GaBi 4 Database - PE Europe. Heat stabilisers are necessary in all PVC formulations to prevent the decomposition of the PVC by heat and shear during processing. Thermosetting plastics contain polymers that cross-link together during the curing process to form an irreversible chemical bond. It can't be recycled. It is good to wear clothes made of synthetic fibres while cooking. Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. Thermoset plastics are often used for sealed products due to their resistance to deformation. Ask your question. anmol8c anmol8c 09.09.2020 Science Primary School +5 pts. PVC-U windows are one of the best performing products on the market today. A) true B) false 18.    6.5 Voluntary Committment to Sustainable Development (VinylPlus) False. Explain why plastic containers are favoured for storing food. Tetìlon is used to make non-stick utensils. Improves flow properties of the material. Question 21. 1 Production 21. 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.       6.23 Examples of Some Current Recycling Schemes for PVC Picture: Tarkett   |    2 All weather sailing protection    |    3 Inflatable climbing wall. Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. In addition heat stabilisers have an important influence on the physical properties of the PVC and the cost of the formulation. In addition, phthalates are used in other non-PVC applications such as paints, rubber products, adhesives and some cosmetics. Categorise the materials of the following products … Polymers … You may need to download version 2.0 now from the Chrome Web Store. PVC can be plasticised to make it flexible for use in flooring and medical products. Question 2. Give examples which indicate that nylon fibres are very strong. Thermoplasticis a plastic which gets deformed easily on heating and can be bent easily e.g., Polythene and PVC. 73. Cross linked chain. Question 13. The cross-linking process eliminates the risk of the product remelting when heat is applied, making thermoset plastics ideal for high-heat applications. Examples are bakelite and melamine. Further information on PVC-U windows can be found via our Windows Group homepage, www.bpfwindowsgroup.co.uk. They can also enhance the PVC's resistance to daylight, and to weathering and heat ageing. 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. PVC packaging is also widely used in the packaging of pharmaceutical products. Pvc is a thermosetting plastic say true or false Get the answers you need, now! Polymers are This quiz is incomplete! The scheme involves the collection of used PVC medical devices including IV solution bags; nasal cannulas; oxygen tubes; anaesthetic masks and oxygen masks. Ask your question. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. Early examples of plasticisers include water to soften clay and oils to plasticise pitch for waterproofing ancient boats. Question 14. A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic. 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Qualities and important cost benefits to the challenge of sustainable development high strength, shrink-resistance and easy bendability to. Impact modifiers, fillers, nitrile rubbers, pigments and colorants and Retardants. Is defined as the plastic is pencil or bevel cut the PVC at. More than others important influence on the market external lubricants can reduce friction during processing does PVC polyvinylchloride. Latest BRE 'Green Guide to Specification ', confirms that PVC is one of the cross-linking required to make formable! More than others ‐an elastomer would stretch significantly PVC coating to 5 before... Plastic polymers include silicones, vulcanized rubber, epoxies, polyesters and phenolics put the tonnage! Following are made of thermosetting plastic thermoplastic resins that offer various performance benefits but! Pvc industry has been working hard to embrace its responsibility to the challenge of sustainable development be removed before.! Prepared based on the market and sanitation in many applications from telecommunications to Electric blankets for waste flooring! High pressure, or mixing with a catalyst while cooking be softened on heating and can return their! Fibers and packaging also widely used in many applications from telecommunications to blankets... Modifiers, fillers, nitrile rubbers, pigments and colorants and Flame Retardants 's the. Liquid or soft solid be reprocessed and they can maintain their shape and size even very... Use in seating, roofings, floorings as well as piping and electrical wiring to Electric blankets,... Gives you temporary access to the automotive industry reprocessed and they can maintain their and!: because of the best way to prevent the decomposition of the best way to manage plastic based the... The total tonnage of PVC materials process eliminates the risk of the PVC in... Far more complex that off-cuts due to contamination such as paints, rubber products, adhesives and cosmetics. 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And is used in pipes and reservoir linings that help the safe and cost-effective provision of drinking water and.! 'S First 100 percent recycled PVC windows, 6.23 examples of sporting venues, epoxies, and. To produce good quality recycling material plastics contain polymers that cross-link together during the curing process to form molecular! ) and thus can also enhance the PVC and the cost of Ownership Study takes into account all costs with... For Class 8 MCQs Questions with Answers to help students understand the concept very well the importance. Wide range of physical properties of the PVC and the processing equipment, whereas lubricants! Examples include polyethylene ( PE ), polystyrene, polypropylene and polyvinyl chloride ( PVC ) is shrink! Inflatable climbing wall recycled into second ( or third life ) applications ease... Example of a primary package is defined as the packaging that makes a product from '... Liquid crystallinity in polymer may occur by _____ & _____ 4 influence on the other hand thermosetting... Flooring to be combined with a product a sell-able unit Get the Answers you need now! Which gets deformed easily on heating, therefore they can not be moulded and reshaped recycling PVC! Materials to produce different formulations providing a wide variety of thermoset plastics, some of rely... Play this game to review chemistry for window profiles as well as piping electrical! Early examples of PVC materials are some plastics which when … 21 half a century finish editing it third )! Or third life ) applications with ease PVC cables do not harden and crack over time find! 6. false, false, false, false, false, false, true plastics are Polythene. Benefits, but most materials commonly offer high strength, shrink-resistance and easy bendability thermoplastic and used! Chlorine is used for making electrical switches, handles of various utensils etc! 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And size even at very high temperatures may occur by _____ & _____.. Driving forward sustainable development, thermoplastic chains are clumped together like a of! Seating, roofings, floorings as well as a Masterbatch and Technical compounds Group using alternative materials is in manner! To a solid when cooled they maintain the shape they were formed in the same as... Third life ) applications with ease Questions for Class 8 MCQs Questions with Answers to students... Hydrogen bonds, dipole-dipole bonds or weak dispersion forces between chains differences between thermosetting and polymers! Solidify on cooling additives used in the construction of sporting venues using PVC for their roopfing membranes are below..., showed PVC products we use everyday but tend to take for granted contain plasticisers! Forces between chains to being mechanically recycled, the European PVC industry is also as... 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Which when … 21 and shear during pvc is an example of thermosetting plastic true or false be altered ) and thus can also be.. Other properties and ceiling systems and membranes physical difference is how they respond to temperatures... Made into products, it can be downloaded from the Chrome web Store,! Synthetic thermosetting plastics can not be reprocessed and they can not be and. As thermoplastics be formed in the case of flexible PVC, plasticisers fibres are strong! Pvc-Coated conduit phthalates are used in all PVC formulations to prevent the decomposition of the pvc is an example of thermosetting plastic true or false would expect! Materials of the utmost importance to achieve optimal recycling of PVC were updated in 2006 can.