聚己二酸丁二醇酯增塑聚乳酸的结构与性能  

Structure and Properties of Plasticized Poly (Lactic Acid) By Poly-1,4-Butylene Adipate Glycol

作　　者：胡泽宇[1] 周昌林[1] 雷景新[1] 

机构地区：[1]四川大学高分子研究所、高分子材料工程国家重点实验室,四川成都610065

出　　处：《塑料工业》2014年第12期25-28,共4页China Plastics Industry

摘　　要：采用摩尔质量为1 000 g/mol的聚己二酸丁二醇酯(PBA)对聚乳酸(PLA)进行增塑改性。通过转矩流变仪、动态热机械分析、扫描电子显微镜、力学性能和增塑剂迁移性测试等手段研究了改性后的PLA的结构与性能。结果表明,PBA能有效降低PLA的玻璃化转变温度,并改善其冲击强度、断裂伸长率和加工性能:其最大的冲击强度和断裂伸长率大约分别为纯PLA的3、11倍,加工黏度显著降低。PBA与PLA具有良好的相容性,125℃时的迁移率低于0.7%。The blends of poly-1, 4-butylene adipate glycol （PBA, 1 000 g/mol） and poly（lactic acid） （PLA） were prepared by melting mixing. The structure and properties of modified PLA were studied by torque rheometer, DMA, SEM, mechanical properties test and plasticizer migration tests. The results showed the glass transition temperature of PLA obviously decreased with the addition of PBA. The Izod impact strength, elongation at break and processing property were all markedly improved; the impact strength and elongation at break of modified PLA were 3 times and 11 times compared with those of pure PLA, respectively. The processing viscosity was significantly reduced. PBA and PLA had good compatibility and its migration rate was lower than 0.7% at 125 ℃.

关 键 词：聚乳酸 聚己二酸丁二醇酯 增塑 迁移性 相容性 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]