benzene rings are planar/ groups are at positions 1 and 4, produces a flat molecule/ chains can pack closely/ very strong H bonds
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What are addition polymers?
a type of polymer formed from joining two alkene monomers together/ no waste products/ double bond opens out
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How are polymers broken down?
hydrolysis
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How are polyamides usually broken down?
usually acid hydrolysis (alkali too slow)/ 2nH2O with H2SO4 catalyst
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How are polyesters usually broken down?
alkali hydrolysis/ di carboxylate salt formed and diol
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How are polyesters and polyamide bio degradable?
as they can be easily hydrolysed/ can be broken down my microorganisms/ synthetic ones take much longer tho
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What is the problem with addition polymers?
very stable so take v long to break down as won't hydrolyse
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Describe how chemists are trying to minimise environmental waste by developing biodegradable polymers
producing alternative polymers that biodegrade quickly and are renewable/ poly lactic acid (PLA) from fermentation of sugar cane/ rubbish bags/ disposable eating utensils etc.
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How are polyesters and polyamides photodegradable?
C=O absorbs UV radiation/ causes bond to break
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Other cards in this set
Card 2
Front
Outline a condensation reaction
Back
a reaction which two small molecules react together to form a larger molecule with the elimination of a smaller molecule
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