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- W2367046987 abstract "To improve the brittle and poor thermal properties of PLA homopolymer,PLA was modified by melting chain extension reactions in the present of catalyst and chain extender to form multi-block structures.Many factors had the influence on the structure and molecular weight of PLA chain extended with MDI,such as reaction time,molecular weight of prepolymers,and content of chain extender.Both prepolymers and block copolymers were characterized by gel penetrating chromatography GPC,infrared spectroscopy IR,nuclear magnetic resonance(1H NMR、 13C NMR).The results showed that new chain segments were introduced into PLA chain skeleton,molecular weight were remarkably increased." @default.
- W2367046987 created "2016-06-24" @default.
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- W2367046987 date "2007-01-01" @default.
- W2367046987 modified "2023-09-24" @default.
- W2367046987 title "The Preparation of PLA-b-PBA Multi-block Copolymer by Melting Chain Extension Reactions" @default.
- W2367046987 hasPublicationYear "2007" @default.
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