拉伸对PLA及其复合材料结构和性能的影响  

Effects of Stretching on Microstructure and Properties of Polylactic Acid and its Alloy Composites

作　　者：邬昊杰 赵佳旭[1] 孟兵[2] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065 [2]成都航空职业技术学院,四川成都610100

出　　处：《现代塑料加工应用》2015年第6期13-16,共4页Modern Plastics Processing and Applications

基　　金：广东省重大科技项目基金(2012A0801050021)

摘　　要：研究了拉伸对纯聚乳酸(PLA),PLA/聚己二酸-对苯二甲酸丁二醇酯(PBAT)及PLA/无机填料复合材料的动力学性能、微观结构和热性能的影响。结果表明:PLA在不同拉伸力变化速率下应变发生突变时所需拉伸力大小不同,1 N/min时所需拉伸力最小,3 N/min和5 N/min所需拉伸力相当;对PLA/PBAT共混物进行拉伸,应变均随拉伸力的增加而增加;PLA/无机填料复合材料在3 N/min和5 N/min拉伸力变化速率下,应变随拉伸力的增大而增大;拉伸使得PLA及其复合材料的冷结晶温度降低,随拉伸力变化速率的提高,熔融峰温度略有下降。Effects of and thermal properties stretching on the dynamic mechanical properties, microstructure of polylactie acid （PLA）. PLA/poly （hutyleneadipate-co-tereph- thalate） （PBAT） and PLA/inorganic fillers were studied. The results show that tensile force for making the strain of pure PLA mutate is different under different changing rates of tensile force. When the changing rate of stretching is 1 N/rain, the required force is minimum, and the required force is almost equal when it is 3 N/min and 5 N/rain. The strain of PLA/PBAT blends increases with the increase of drawing force. For PLA/inorganic fillers, the strain increases with the increase of tensile force when the changing rate of stretching is 3 N/min and 5 N/min. The cold crystallization temperature of PLA and composites decreases after stretching, and the peak melting temperature decreases slightly with the increase of the changing rate of tensile force, and the degree of crystallinity of PLA is slightly affected.

关 键 词：聚乳酸 聚己二酸-对苯二甲酸丁二醇酯 无机填料 拉伸 

分 类 号：TB332[一般工业技术—材料科学与工程]