2M 75. Question 13. Define the additive: Plasticiser. 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. : Elastomers can be formed in the same way as thermosetting plastics. The scheme involves the collection of used PVC medical devices including IV solution bags; nasal cannulas; oxygen tubes; anaesthetic masks and oxygen masks. Your IP: 37.187.30.118 Reduce static charge build up. A) true B) false 18. Whilst old windows are recycled, the process is far more complex that off-cuts due to contamination such as building debris (e.g. 5. Hence these plastics cannot be reprocessed and they can maintain their shape and size even at very high temperatures. True False 39. 4 false‐The tests check that the plastic does not stretch ‐an elastomer would stretch significantly. 7. 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. 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. They can be melted again and again. 2 Physical Properties A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic. Examples of thermoplastics include polythene (PE), polypropylene (PP), polyvinyl chloride … 4. There are multiple thermoplastic resins that offer various performance benefits, but most materials commonly offer high strength, shrink-resistance and easy bendability. Polyvinyl chloride (PVC) is considered a thermoplastic. Polyvinyl Chloride (PVC) is one of the most widely used polymers in the world.        3.13 Plasticisers The report, published June 2004, showed PVC products to be comparable to alternatives in their environmental impact. This process is called compounding. Basil Hamed. 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.    5.4 Automotive Synthetic Fibres and Plastics Class 8 MCQs Questions with Answers. Answer: True. PVC's inherent flame retardant and excellent electrical insulation properties make it ideal for cabling applications. The BPF has a dedicated Additives Group, as well as a Masterbatch and Technical compounds Group. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. The main physical difference is how they respond to high temperatures. The Recofloor scheme, managed by Axion Consulting Ltd, provides a mechanism for waste vinyl flooring to be collected and recycled. Synthetic    5.3 Electronics These optional additives are not strictly necessary for the integrity of the plastic but are used to draw-upon other properties. Thermoplastics are known for their high molecular weight because intermolecular interactions increase as the plastic is cooled. The electrolysis of salt water produces chlorine, which is combined with ethylene (obtained from oil) to form vinyl chloride monomer (VCM). PVC (polyvinylchloride) -a cheaper plastic used for window frames and pipes. Page No 44: Question 12: Give scientific reasons for the following: (a) Plastic containers used for microwave cooking can be made of thermosetting plastic. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc.    5.1 Construction A Total Cost of Ownership study takes into account all costs associated with a product over its entire life cycle. Give examples which indicate that nylon fibres are very strong. 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. 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. Play this game to review English. Explain why thermoplastic polymers have different properties to thermosetting polymers. 73. False. Answer: Bakelite and melamine. 3. 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. Question 13. Why does PVC (polyvinyl chloride) have different properties from polyethene? Another word for Elastomer? Answer 2 Grind the PVC coating to 5 mil before treading. Rubber. As PVC is a highly versatile construction material with a favourable environmental footprint it is extensively used in the construction of sporting venues. Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. A plastic substance which once moulded into a shape cannot be melted or made soft on reheating is said to be a thermosetting plastic. The structure and composition of PVC lends itself to being mechanically recycled, with reasonable ease, to produce good quality recycling material. Stereo specific polymers are obtained by _____ polymerization. Pencil or bevel cut the PVC coating at the end of the conduit. The functional additives used in all PVC materials include heat stabilisers, lubricants, and in the case of flexible PVC, plasticisers. Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. A lot of plastic pollutes our environment. Cape Town World Cup 2010 Stadium. Can you write the major difference between these two types of plastics? 2. 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. 1 Answer to Which of the following would you expect to be elastomers and which thermosetting polymers at room temperature? Can you write the major difference between these two types of plastics? Picture: Courtesy of Akcros Chemicals. Give 2 elastomers. Ask your question. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices.        3.12 Lucricants PVC is also used in pipes and reservoir linings that help the safe and cost-effective provision of drinking water and sanitation.     3.2 Optional Additives Log in. Once formed, it can be heated and reformed over and over again Cross linked chain. answer choices . • 1.2 Bi-Products (b) Write down the structure of monomer and… Categorise the materials of the following products into 'can be recycled' and 'cannot be recycled'. Q. Thermosetting Plastics. With around 1500 hospitals in the UK, estimates put the total tonnage of PVC waste at over 2,000 tonnes per annum. 2M 74. Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches. FALSE, Thermoplastics. PVC (polyvinylchloride) -a cheaper plastic used for window frames and pipes. Rubber. Pencil or bevel cut the PVC coating at the end of the conduit.    6.4  Total Cost of Ownership Study Reduce static charge build up. Play this game to review English. Differentiate between the thermoplastic an d thermosetting plastics. Examples are bakelite and melamine. Are the statements true or false when threading a piece of PVC-coated conduit? In Blown Film Manufacturing. PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. PVC has been used extensively in a wide range of construction products for over half a century. 22. Polymers are This quiz is incomplete! Give 2 elastomers. 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 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. The blending of PVC polymer with other materials to produce different formulations providing a wide range of physical properties. Elastomers. 5 true 6 false‐Material is melted down and reused, something not possible with thermosetting plastics. Another word for Elastomer? The liquid crystallinity in polymer may occur by _____ & _____ 4. • PVC can be plasticised to make it flexible for use in flooring and medical products. Many of the PVC products we use everyday but tend to take for granted contain phthalate plasticisers. Picture: Kind permission of ECVM.    6.2  Recycling of PVC Following the conclusion of the Vinyl2010 ten year programme, new targets for sustainable development were launched as part of the successor VinylPlus programme. Question 4.        3.11 Heat Stablisers A polymerisation in which two or more different monomers takes part is called _____ 7. What … 4. For further information, please visit, www.recofloor.org/. Which type of chain would be found in a thermosetting plastic? 1. Thermoset plastics are often used for sealed products due to their resistance to deformation. Eco-profiles of PVC were updated in 2006 and can be downloaded from the PlasticsEurope Eco-profiles webpages. Log in. Give one example of each. They are easily molded and extruded into films, fibers and packaging. 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. 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. 3.11 Heat stabilisers  Thermosetting plastics cannot be bent as they break when forced to bend. The most commonly and widely used nitrogenous fertilizer in Pakistan is: a) Nitrolin b) Urea c) Ammonium Sulphate d) Ammonium Nitrate … A plasticiser is a substance which when added to a material, usually a plastic, makes it flexible, resilient and easier to handle. They are used to make carrier bags. answer in 70 words - 25668708 Initially, the polymer is a liquid or soft solid. Define the additive: Plasticiser. _____ is an example of fibre reinforced plastic. Bakelite is an example of thermosetting plastics. 21. Other sporting applications: performance sports surfaces, sports equipment, clothing, protective barriers, matting, wiring and piping infrastructure. Define the additive: Anti-static agents. Tetìlon is used to make non-stick utensils. It is good to wear clothes made of synthetic fibres while cooking. Thermosetting plastics, also called .    5.5 Sport Answer 21. 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. Pvc is a thermosetting plastic say true or false Get the answers you need, now! Such a material is also known as a thermoset or thermosetting polymer. Give some examples of thermoplastics. Stereo specific polymers are obtained by _____ polymerization. Examples of thermoplastics that are common in engineering include: ABS (acrylonitrile butadiene styrene)- stiff and light, used in vehicle bodywork. Thermosetting Plastics:There are some plastics which when … In addition, phthalates are used in other non-PVC applications such as paints, rubber products, adhesives and some cosmetics. 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. A) true B) false 17. Picture: Kind permission of Bruce Sutherland, City of Capetown/PVCplus. 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. Picture: Fotalia. The material now accounts for about 20% of all plastic manufactured world-wide, second only to polyethlene. answer choices . 3. The trade name of polymethylmethacrylate is _____ 8. 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. Thermosetting polymers have covalent bonds. Answer 21. In creating VinylPlus, the industry has chosen to work in an open process of extensive stakeholder dialogue, including private companies, NGOs, regulators, politicians and users of PVC. Can be deformed a large amount when a force is applied and can return to their original shape when released. 7 Useful Links 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. As with most recycling streams, sorting is of the utmost importance to achieve optimal recycling of PVC materials. Maximum thermoplastics can be recycled. Picture: Kind permission of Base Structures Ltd. 3. These are used to reduce friction during processing. Thermoplastic polymers have hydrogen bonds, dipole-dipole bonds or weak dispersion forces between chains. The material now accounts for about 20% of all plastic manufactured world-wide, second only to polyethlene. Visually speaking, thermoplastic chains are clumped together like a ball of tangled yarn. Note: Because of the cross-linking required to make a thermoset, they are often referred to as cross-linked materials. 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. Thermoplastics. Eco-profiles provide environmental analysis for a product from 'cradle-to-gate' (as opposed to the 'cradle-to-grave' approach of Life Cycle Assessment). Give some examples of thermosetting plastics. 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. It is good to wear clothes made of synthetic fibres while cooking. On the other hand, thermosetting plastics cannot be bent once moulded. 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. 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. Lords Cricket Ground roof. Join now. steel, concrete and sealants) which need to be removed before re-processing. Can you write the major difference between these two types of plastics? PVC (polyvinyl chloride) is a thermoplastic and is used for making toys, chappals, etc. 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. 5. Molecules of VCM are polymerised to form PVC resin, to which appropriate additives are incorporated to make a customised PVC compound . Contents 2. More information on the role of PVC in sport can be found at, Plastics: A Vision for a Circular Economy, 6.5 Voluntary Committment to Sustainable Development (VinylPlus), Rotational Moulding (Materials Available), Styrene Acrylonitrile (SAN) & Acrylonitrile Styrene Acrylate (AS, Bio-based plastics: Feedstocks, Production and the UK Market, Case Study: Compostable Bags for Organic Waste Collection, Packaging waste directive and standards for compostability, Plastics in Electrical and Electronic Applications, PVC has extensive European food contact and medical approvals, PVC is easy to process, long lasting, tough and light, PVC consumes less primary energy during production than any of the other commodity plastics. Some examples of sporting venues using PVC for their roopfing membranes are shown below. 3 PVC and Additives PVC and polyethylene are examples of thermoplastics. High Phthalates: High molecular weight (HMW) phthalates are those with 7 - 13 carbon atoms in their chemical backbone. Polymers … 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. A) PVC B) Polythene C) Bakelite D) None of these 19. 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. Curing is induced by heat or suitable radiation and may be promoted by high pressure, or mixing with a catalyst. What is the full form of PVC? This includes use in seating, roofings, floorings as well as piping and electrical wiring. They are used for electrical plugs and sockets. 4 Benefits of PVC Telephone instruments, plastic toys, cooker handles, carry bags, ball point pens, plastic bowls, plastic covering on electrical wires, plastic chairs, electrical switches. True or False: A primary package is defined as the packaging that makes a product a sell-able unit. You may need to download version 2.0 now from the Chrome Web Store. 2M 75. Continuous chain. 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. Further information on PVC-U windows can be found via our Windows Group homepage, www.bpfwindowsgroup.co.uk. MCQ Questions for Class 8 Science with Answers were prepared based on the latest exam pattern. Plastic Bags: Cook wares: Teflon: Thermosetting: Answer. Categorise the materials of the following products … We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. These include, DEHP, DBP, DIBP and BBP. These are used for manufacturing toys, combs, cargrills and various types of containers. Categorise the materials of the following products into 'can be recycled' and 'cannot be recycled'. Some other examples of thermoset plastic polymers include silicones, vulcanized rubber, epoxies, polyesters and phenolics. Question 16. Can be deformed a large amount when a force is applied and can return to their original shape when released. Question 21. Thermoplastics become moldable above a specific temperature and then return back to a solid when cooled. Question 21. Answer: (False) Correct statement: It is good to wear clothes made of fibres while cooking. 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. To play this quiz, please finish editing it. 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. Low Phthalates: Low molecular weight (LMW) phthalates contain eight or less carbon atoms in their chemical backbone. Ask your question. True or False : Question 1. Thermosetting plastics cannot be softened on heating, therefore they cannot be moulded and reshaped. Answer: Bakelite and melamine. SURVEY . 5 Applications Urea is an excellent nitrogenous direr which contains nitrogen about: a) 36% b) 47% c) 80 % d) 60% 4. Stadium seating. Thermoplastics on heating get deformed (its shape and size can be altered) and thus can also be bent. *Response times vary by subject and question complexity. Improves flow properties of the material. The report can be downloaded from the Europa website. Plastic Bags: Cook wares: Teflon: Thermosetting: Answer. Give examples which indicate that nylon fibres are very strong. The nature of the material means that blood can be stored safely for longer. Question 14. True or false? What is 4R’s? Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Explain why the following are made of thermosetting plastics: (a) Saucepan handles (b) Electric plugs/switches/plug boards 6. Question 14. Bakelite is a thermosetting plastic and is used for making electrical switches, handles of various utensils, etc. Examples are bakelite and melamine. polycarbonate - used to make strong, transparent panels and vehicle lights. 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. Some examples of Thermoplastics are – Polythene and PVC. Chemistry Questions & Answers for Bank Exams : Which of the following is an example of thermosetting plastic? Due to its properties it reprocesses well and can be recycled into second (or third life) applications with ease. Give some examples of thermoplastics. Decide whether the following statements about thermosetting plastics are true or false. Examples of thermoplastics that are common in engineering include: ABS (acrylonitrile butadiene styrene)- stiff and light, used in vehicle bodywork . This discussion on Which of the following is an example of thermosetting plastic?a)Bakeliteb)PVCc)Polyethylened)No option is correct.Correct answer is option 'A'. Materials that compete with PVC are often promoted as a more natural choice, indeed, ‘natural’ does not equate to ‘better’ or ‘more sustainable'. polycarbonate - used to make strong, transparent panels and vehicle lights. PVC-U windows, in a domestic setting, score an "A" rating and in the commercial arena, an "A+" rating - the best there is! 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