Polyethylene terephthalate photodegradation

Characterizing the mechanisms involved in the photodegradation of the various polymers that compose organic cells offers the advisability of reviewing the majority of the mechanisms involved in the photodegradation of polymers. MDMO and MDMO-PPV can be used as an active layer, whereas polymers like polyethylene terephthalate (PET) are used as substrates, and various materials are sounded for encapsulation PC, ceramic on PC, and nanocomposites. 

In polymers where the carbonyl carbon is on the backbone, both the Norrish Type I and Type II reactions will lead to lowering of the molecular weight (chain scission [874]. Much has been published on the photodegradation of polymers containing small amounts of carbonyl groups in the main chain, obtained by copolymerization of a given monomer with small amounts of carbon monoxide, as polyethylene [809, 866, 917, 933, 934, 1334, 1998], polypropylene [1108], poly(methyl acrylate) [122, 123], poly(methyl methacrylate) [123], poly(acrylonitrile [41], poly(acrylic acid) [1465], poly(vinyl chloride) [320,937,1165], polystyrene [510, 794,936,1015,1164,1166,1429, 1430,1570,1966] aliphatic polyesters [1725] and poly(ethylene terephthalate) [42]. 

The technology and role of photodegradable plastics is considered and computer models are described to evaluate strategies for litter abatement, and experimental studies of the synthesis and biodegradation of conventional and photodegradable polyethylene, polypropylene, poly(ethylene terephthalate), and polystyrene. 

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