Using Alkenes to make Polymers 3.0 / 5 based on 1 rating ? ChemistryPolymersGCSEAQA Created by: ZaraCreated on: 11-01-13 23:50 What is the most useful thing you can do with alkenes? Polymerisation 1 of 20 What is polymerisation? This means joining together lots of small alkene molecules (monomers) to form very large molecules (polymers) 2 of 20 What is produced when many ethene molecules are joined up? Polythene 3 of 20 What do the physical properties of a polymer depend on? What it's made from 4 of 20 What do the physical properties of a polymer also depend on? The temperature and pressure of polymerisation 5 of 20 If polyethene is made at 200'C and 2000 atmospheres pressure what are it's physical properties? It is flexible and has low density 6 of 20 If polyethene is made at 60'C and a few atmospheres pressure what are it's physical properties? Rigid and dense 7 of 20 What are light, stretchable polymers (such as low density polyethene) good for? Making plastic bags 8 of 20 What are elastic polymer fibres used to make? LYCRA fibre for tights 9 of 20 Name 3 different uses of polymers Waterproof coatings for fabrics. Dental polymers are used in tooth fillers. Polymer hydrogel wound dressings keep wounds moist 10 of 20 What's being produced from polymers and cornstarch? New biodegradable packaging 11 of 20 What is an example of a smart material? Memory Foam 12 of 20 What does a smart material do? Get softer and warmer 13 of 20 What does biodegradable mean? Not being broken down by microorganisms, so they don't rot 14 of 20 What's the best thing to do with polymers? Re-use them as many times as possible and recycle them 15 of 20 Are things made from polymers cheaper or more expensive than things made from metal? Cheaper 16 of 20 As crude oil resources get used up, what will happen to the price of crude oil? It will rise 17 of 20 Give 2 examples of naturally occurring polymers Rubber and silk 18 of 20 Give 2 examples of synthetic polymers Polyester and PVS 19 of 20 Give an example of a polymer inside the body DNA 20 of 20
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