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%。
In this study,blends from poly(lactic acid)(PLA) and polybutyleneadipate-coterephthalate(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 C to 82 C.PBAT/PLA film could be fabricated with good mechanical property only if PLA content was below 70%.
出处
《中国塑料》
CAS
CSCD
北大核心
2015年第3期45-50,共6页
China Plastics
