中国塑料 ›› 2015, Vol. 29 ›› Issue (03): 45-50 .DOI: 10.19491/j.issn.1001-9278.2015.03.008

• 材料与性能 • 上一篇    下一篇

PBAT/PLA薄膜的制备及性能研究

杨冰1,张自强2,张以河3,季君晖许颖蒋丹4   

  1. 1. 中国地质大学材料科学与工程学院2. 中国地质大学(北京)3. 中国地质大学(北京) 材料科学与工程学院4. 北京联合大学
  • 收稿日期:2014-11-24 修回日期:2015-01-15 出版日期:2015-03-26 发布日期:2015-03-26

Preparation and Properties of PBAT/PLA Film

  • Received:2014-11-24 Revised:2015-01-15 Online:2015-03-26 Published:2015-03-26

摘要: 将聚乳酸(PLA)和聚对苯二甲酸-己二酸-丁二醇酯(PBAT)共混制备成共混材料,探讨了不同PLA含量对材料性能的影响。结果表明,PBAT/PLA共混材料中,随着PLA含量的增加,拉伸强度先降低后升高,当PLA含量为90 %时,拉伸强度达到60.12 MPa,而其断裂伸长率从703 %降低至8 %,由韧性材料逐渐转变为脆性材料;PLA含量为30 %时,性能变化出现拐点;PLA含量为50 %时出现明显相分离,且PLA的加入可以加速PBAT材料的结晶,使结晶温度由38 ℃提高至82 ℃;PBAT/PLA共混材料在PLA含量低于70 %时,都可以实现较好的吹膜过程,且薄膜材料的拉伸强度为39.59 MPa,断裂伸长率不低于137 %。

关键词: 聚对苯二甲酸己二酸丁二醇酯, 聚乳酸, 力学性能, 生物降解性能, 相容性

Abstract: In this study, blends from poly(lactic acid) (PLA)and polybutyleneadipate-co-terephthalate (PBAT) was fabricated and the mechanical and bio-degradation properties were studied. It showed that with increasing PLA content, the tensile strength of PBAT/PLA blends increased firstly and then decreased, the elongation at break decreased continuously, and the blends underwent a ductilebrittle transition. When PLA content reached 30 wt %, a mechanical property change point occurred. When PLA content reached 50 %, phase separation took place. The addition of PLA could accelerate the crystallization rate of PBAT, which increased the crystallization temperature from 38 ℃ to 82 ℃. PBAT/PLA film could be fabricated with good mechanical property only if PLA content was below 70 %.

Key words: poly(butyleneadipate-co-terephthalate), poly(lactic acid), mechanical property, biodegradale property, compatibility