PLA/PCL/滑石粉复合材料的制备与性能  

Preparation and Properties of Polylactide/Polycaprolactone/Talc Composites

作　　者：应启广 陆颖[2] 章诚[2] 刘春林[2] 夏艳平[2] 周安[2] 甘国民 曹峥[2] 

机构地区：[1]上海方田弹性体有限公司,上海201611 [2]常州大学材料科学与工程学院,江苏常州213164

出　　处：《工程塑料应用》2016年第8期31-35,共5页Engineering Plastics Application

摘　　要：在聚乳酸(PLA)中添加不同含量的聚己内酯(PCL)和滑石粉,同时添加增容剂柠檬酸三丁酯(TBC),通过熔融共混制备一系列PLA/PCL/滑石粉复合材料。主要研究了PCL、滑石粉以及TBC对PLA力学性能和结晶性能的影响。结果表明,PCL提高了PLA的韧性,但降低了强度,滑石粉主要起到了增强作用,但降低了PLA韧性,而将两者共同添加到PLA中可以起到一定的增强增韧作用,其异相成核作用也提高了PLA的结晶度。增容剂TBC的加入,改善了PLA和PCL的相容性,提高PCL的增韧效果以及复合材料的结晶度,但略微降低了PLA的拉伸强度。当PCL和滑石粉质量分数均为10%且加入0.5份的TBC后,PLA/PCL/滑石粉复合材料的断裂伸长率、拉伸强度、结晶度分别为13.3%,61.6 MPa,43.0%,相比纯PLA分别提高了533%,2%,73.4%。Polycaprolactone （PCL） and talc were added at different ratio into polylactide （PLA） matrix resin,and compatibilizertributyl citrate （TBC） was also added,then a series of PLA/PCL/talc composites were prepared by melt blending. The effects ofPCL,talc and TBC on the mechanical properties and crystallization behaviors of PLA/PCL/talc composites were mainly studied.The results show that PCL can increase the toughness of PLA but decrease the strength,talc can increase the strength but decreasethe toughness. Adding PCL and talc into PLA can generate a certain reinforcing and toughening effect for PLA,and the heterogeneousnucleation effect also improves the crystallinity of PLA. The addition of the compatibilizer TBC can improve the compatibilitybetween the PLA and PCL,and improves the toughening effect of PCL and crystallinity of the composites,but decreases the tensilestrength slightly. When the mass fraction of PCL and talc is 10% respectively and TBC content is 0.5 phr,the elongation at break,tensile strength and crystallinity of PLA/PCL/talc composite is 13.3%,61.6 MPa and 43.0%,increases by 533%,2%,73.4%compared with pure PLA seperately.

关 键 词：聚乳酸 聚己内酯 滑石粉 增强增韧 结晶性能 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]