Chem. J. Chinese Universities

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Non-isothermal Crystallization Behavior of PLLA-PEG Copolymer

REN Jie*, GUI Bao-Zhu, REN Tian-Bin, YANG Jun, GU Ming-Hao   

  1. Key Laboratory of Advanced Civil Engineering Materials, Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2007-03-30 Revised:1900-01-01 Online:2007-10-10 Published:2007-10-10
  • Contact: REN Jie

Abstract: Poly(L-lactic acid)-poly(ethylene glycol) was copolymerized with direct melt copolymerization, and its crystallization was studied via WAXD and DSC. Via using Avrami equation modified by Jeziorny, the crystallization kinetics under a non-isothermal condition was analyzed. The crystallization of PLLA was obvious, while the PEG's could not observed. But the flexibility of PEG promoted PLLA's crystallization. And the crystalline temperature, velocity and crystallinity of PLLA-PEG increased with the increase of molecular weight of PEG and the feed weight ratio.

Key words: Poly(lactic acid), Poly(ethylene glycol), Direct melt condensation polymerization, Non-isothermal crystallization

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