Abstract: 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/m2, 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.

摘要： 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/m2，断裂伸长率为 289.9%；PBAT⁃GMA 上的环氧基团能 PLA 的端基发生反应，可有效改善 PLA 与 PBAT 之间的界面相容性。