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

江闻欣 张广翔 杨可 赵桂艳

Wenxin JIANG Guangxiang ZHANG Ke YANG Guiyan ZHAO

辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China

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/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.

辽宁省教育厅科学技术研究项目(LJKMZ20220733)

10.12422/j.issn.1672-6952.2024.05.005