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Study on Degradation Performance of PLA Biocomposites

YANG Mei-juan,XUE Ping(Beijing University of Chemical Technology Institute of Plastic Machinery and Engineering,Beijing 100029,China)  
Aftersoil burial degradation,quality and performance changes of the PLA/thermoplastic starch(TPS)blends before and after modification with PEG400 were studied.Results show that:before the modification,degradation performance increases along with increase of TPS content.Afterthe modification with PEG400,degradation rate increases with increase of PEG400 concentration,which indicates that PEG400 can promote degradation of the compound materials in a certain extent.
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