生物降解聚酯PLA/PBSA共混体系的制备与结构性能  

Structure and Properties of Biodegradable Poly(Lactic Acid)/Poly(Butylene Succinate Adipate) Blends

作　　者：宋存江[1] 陶剑[1] 胡丹[1] 郭天瑛[2] 张育英[2] 张邦华[2] 王淑芳[1,2] 

机构地区：[1]南开大学生命科学学院生物活性材料教育部重点实验室 [2]南开大学化学学院功能高分子材料教育部重点实验室,天津300071

出　　处：《高分子材料科学与工程》2009年第7期137-140,共4页Polymer Materials Science & Engineering

基　　金：天津市科技攻关项目(05YFSZSF02200;06YFGZSH06800)

摘　　要：采用熔融共混法制备了PLA/PBSA共混材料;采用DSC,TG,DMA和拉伸力学试验研究了该共混体系的热性能和力学行为;采用土壤悬浊拟环境降解实验法研究了共混材料的生物降解性;同时对该体系的生物降解机理及影响因素进行了初步探讨。结果表明,PLA/PBSA为非均相结晶/结晶高分子共混体系;PLA含量增加,有利于提高材料的模量和拉伸强度;增加PBSA的含量,可以提高PLA/PBSA共混体系的环境生物降解性。PLA/PBSA是力学性能和降解性能互补的生物降解材料。Blending is a more effective way modifying polymer properties. Poly （lactic acid） /poly （butylene succinate adipate） （PLA/PBSA） blends were prepared by melt mixing method. Thermal properties and mechanical properties of the blends were investigated by DSC, TG, DMA and tensile mechanical test. The biodegradability of the blends was investigated by the cultivation degradation method in soil suspension. Experimental results indicate that PLA/PBSA is immiscible blend system. Increasing PBSA content in PLA/PBSA blends leads to decrease in tensile strength and modulus, but increase in elongation at break and biodegradability. PLA/PHBHHx blends possess a good combination of mechanical properties and biodegradation rate. The blends can widely be used in environmental plastics.

关 键 词：聚乳酸 丁二酸丁二醇酯-己二酸丁二醇酯共聚物 共混 结构与性能 

分 类 号：TQ316.67[化学工程—高聚物工业]