聚乳酸／PBAT共混物的制备及其性能研究  

Preparation and Properties of Poly (lactic acid)/PBAT Blend

作　　者：顾书英[1] 詹辉[1] 任杰[1] 

机构地区：[1]同济大学材料科学与工程学院纳米与生物高分子研究所,上海200092

出　　处：《中国塑料》2006年第10期39-42,共4页China Plastics

基　　金：国家科技攻关--世博会科技专项(2004BA908B04)留学回国人员启动基金及同济大学青年教师基金资助

摘　　要：用熔融挤出法制备了聚乳酸/对苯二甲酸-己二酸-1,4-丁二醇三元共聚酯(PLA／PBAT)共混物,研究了聚乳酸／PBAT共混物的力学性能、热性能以及相容性。结果表明:共混物的冲击强度及断裂伸长率随着PBAT含量的增加而增大,在PBAT含量为30％时,断裂伸长率最大,达到9％,PBAT的加入降低了共混物的拉伸、弯曲性能,但在添加量较少的情况下(如5％和10％),拉伸、弯曲性能下降不大。退火处理极大的提高了材料的维卡软化温度。当PBAT含量较高时,共混物的断面可以明显的观察到不相容的两相结构。Blends of PLA and poly（butylene adipate-co-terephthalate）（PBAT） were prepared using a twin screw extruder. Mechanical properties, thermal performance and compatibility of the components were investigated. It showed that the notched charpy impact strength and the elongation at break of the blends increased, but tensile and flexural strengths decreased with increasing PBAT content. However, when the loading of PBAT was low （say, 5 % ～ 10 % ）, the negative influence was very small. After annealing, the Vica softening point of PLA/PBAT blends increased markedly. Incompatible two phase structures could be observed from the fractured surface of the blends when PBAT content was high.

关 键 词：聚乳酸 对苯二甲酸-己二酸-1 4-丁二醇三元共聚酯 力学性能 相容性 

分 类 号：O631.3[理学—高分子化学]