Polymers 1.0 / 5 based on 1 rating ? Design Technology: Product DesignASAQA Created by: EmilyCreated on: 21-03-13 09:51 What are plastics? Plastics are a group of materials made up of long chains of molecules. 1 of 16 What are Hydrocarbons? Long chain molecules which consist of Hydrogen and Carbon. 2 of 16 What is a polymer? A polymer consists of long chains of monomers. Normally chains are randomly arranged and form a 3D pattern. 3 of 16 What is the process which forms Polymers? Polymerisation 4 of 16 What is the length of a Polymer? Fully uncoiled, one polymer molecule's chain length may be 10,000 times the diameter of the chain. 5 of 16 What gives the material its flexability? The length of the chain. 6 of 16 What is Tg? Tg stands for glass transition temperature. This is the temperature at which a polymer moves from a hard glass like state to a softer rubbery state. 7 of 16 Describe a semi-synthetic polymer Cellulose is a natural material occurring in plant fibres. 8 of 16 What is Cellulose mixed with? Acetic acid to produce cellulose acetate. 9 of 16 Describe another semi-synthetic polymer Caesin, by products of milk are used to create the polymer. 10 of 16 What is casein used in the production of? Buttons. 11 of 16 What are the sources of purely synthetic plastics? Coal, oil and gas. 12 of 16 What process is used in the manufacture of purely synthetic plastics? Thermal Cracking 13 of 16 What is Cellulose? A constituent part of timber, approximately 55% of a tree is made up of cellulose. It can also be used to produce a cellulose - based polymer. 14 of 16 What is Biopol? A polymer made from natural cellulose, which can be used to make biodegradable packaging. 15 of 16 What is degradation? The deterioration of polymers. 16 of 16
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