全生物降解高抗冲PLA/PBAT复合材料的制备与性能

Preparation and Properties of Fully Biodegradable High Impact PLA/PBAT Composites

采用生物降解高分子材料聚己二酸/对苯二甲酸丁二醇酯(PBAT)增韧聚乳酸(PLA),制备了全生物降解高抗冲PLA/PBAT复合材料;为改善PBAT与PLA之间的界面相容性,采用熔融接枝的方法制备了PBAT接枝甲基丙烯酸缩水甘油酯(GMA)(PBAT-GMA)相容剂;研究了相容剂质量分数对PLA/PBAT复合材料性能的影响。结果表明,随着PBAT-GMA质量分数的增加,复合材料的冲击性能大幅提高;当PBAT-GMA质量分数为30%时,复合材料的冲击强度达到64.8 kJ/m^(2),断裂伸长率为289.9%;PBAT-GMA上的环氧基团与PLA的端基发生反应,可有效改善PLA与PBAT之间的界面相容性。

Poly(butyleneadipate-co-terephthalate)(PBAT)was used to toughen poly(lactic acid)(PLA),and a fully biodegradable high impact PLA/PBAT composite was prepared.To improve the interface compatibility between PBAT and PLA,PBAT grafted glycidyl methacrylate(GMA)(PBAT-GMA)compatibilizer was prepared by the melt grafting method.The effect of the mass fraction of compatibilizer on the properties of PLA/PBAT composite was studied.The results show that with the increase of PBAT-GMA mass fraction,the impact strength of the composites is significantly improved.When the PBAT-GMA mass fraction is 30%,the impact strength of the composites reaches 64.8 kJ/m^(2),and the elongation at break is 289.9%;the compatibilizing mechanism is the epoxy groups on PBAT-GMA can react with the end groups of PLA,which effectively improves the interfacial compatibility between PLA and PBAT.