Photodegradable polymers-Side-Chain Ketones

The deliberate introduction of carbonyl groups into polymers, either in the main chain by copolymerization with carbon monoxide or in the side chains by copolymerization with vinyl ketones, is the basis of at least one type of plastic designed to photodegrade rapidly in outdoor exposure (115). These copolymers are widely used in the United States for the six-pack ring packaging of soft drinks, whose damaging effect on marine life has been of great concern. 

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