CIE Jun 2014 v2 Paper 4 Q8

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Polymers consist of monomers joined by either addition or condensation reactions. 18 PMT (a) Name an example of a synthetic addition polymer and a synthetic condensation polymer. addition polymercondensation polymer[2] (b) Addition polymers are long-term pollutants in the environment but condensation polymers are often biodegradable. (i) What type of reaction occurs when condensation polymers biodegrade?(ii) Identify two functional groups that could undergo this type of reaction.[2] (c) Petroleum is a non-renewable resource from which a wide range of useful polymers is currently produced. Current polymer research is looking at renewable plant material as a potential source of monomers. Two monomers obtained from plants are shown. CH3CH(OH)COOH HOCH2COOH Draw the displayed formula of the repeat unit of a polymer using both monomers. (d) Monomers obtained from plant sources do not usually form addition polymers. Suggest why this is.[1] [2]UCLES 2014 9701/42/M/J/14<br /> PMT (e) The diagrams show sections of two polymers Y and Z. 19 N H H N N H (i) What would be the main force between the chains in each polymer? YZ(ii) Which is likely to be the more hydrophilic of these two polymers? Explain your answer.[3] [Total: 10]UCLES 2014 9701/42/M/J/14 [Turn over<br />

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