中国塑料 ›› 2012, Vol. 26 ›› Issue (04): 35-39 .DOI: 10.19491/j.issn.1001-9278.2012.04.007

• 材料与性能 • 上一篇    下一篇

PET/PLA共混物相容性和结晶性能的研究

夏学莲 刘文涛 朱诚身 何素芹 王利娜   

  1. 郑州大学材料科学与工程学院 郑州大学 郑州大学
  • 收稿日期:2011-10-31 修回日期:1900-01-01 出版日期:2012-04-26 发布日期:2012-04-26

Research on Compatibility and Crystallization of PET/PLA Blends

  

  • Received:2011-10-31 Revised:1900-01-01 Online:2012-04-26 Published:2012-04-26

摘要: 研究了相容剂钛酸四丁酯([Ti(OBu)4]含量、聚乳酸(PLA)含量对聚对苯二甲酸乙二醇酯(PET)/PLA共混物相容性的影响,探讨了共混物的熔融和结晶行为,并对其结晶形貌进行了观察。结果表明,Ti(OBu)4含量为PLA的4 %(质量分数,下同)时,PET/PLA共混物的相容性良好,但当PLA含量超过30 %时,共混物出现相分离;PLA的加入使PET的结晶峰变窄,结晶速率增加,且结晶峰温度向高温方向移动;PLA的加入使PET的晶粒尺寸大幅减小,晶粒数目大幅增加,结晶更加完善。

关键词: 相容性, 结晶性能, 聚对苯二甲酸乙二醇酯, 聚乳酸

Abstract: The effects of tetrabutyl titanate[Ti(OBu)4] and poly(lactic acid)(PLA) on the compatibility of poly(ethylene terephthalate)(PET)/ PLA blends were investigated. The melting/crystallization behavior and morphology of the blends were studied. It showed that the blends was compatible when the Ti(OBu)4 content was 4 % of PLA contents; When PLA content was above 30 %, the blends appeared phase separation. The addition of PLA to PET increased the crystallization rate and the crystallization temperature. Besides, the crystal size decreased.

Key words: compatibility, crystallization, poly(ethylene terephthalate), poly(lactic acid)