MAM相对分子质量对PLA/PBAT/MAM共混物结构与性能的影响

Effect of Relative Molecular Weight of MAM on the Structure and Properties of PLA/PBAT/MAM Blends

张海峰 张桂鑫 胡跃鑫 韩向艳 韩媛媛 赵桂艳

Haifeng ZHANG Guixin ZHANG Yuexin HU Xiangyan HAN Yuanyuan HAN Guiyan ZHAO

辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001 抚顺石化公司研究院，辽宁 抚顺 113004

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China Fushun Petrochemical Company Research Institute，Fushun Liaoning 113004，China

通过熔融共混法制备聚乳酸/聚己二酸对苯二甲酸丁二酯/聚（甲基丙烯酸甲酯）?b?聚（丙烯酸丁酯）?b?聚（甲基丙烯酸甲酯）（PLA/PBAT/MAM）三元共混物，研究了MAM相对分子质量对PLA/PBAT/MAM三元共混物形态、结构和性能的影响。结果表明，添加MAM嵌段共聚物，能够有效改善PLA与PBAT的相容性，使共混物的玻璃化温度下降，结晶消失，使分散相粒子尺寸下降，分布更加均匀，提高共混物的冲击强度和断裂伸长率；MAM相对分子质量越大，共混物的冲击强度和断裂伸长率越大，分散相粒子尺寸越小，粒径分布越均匀。

Polylactic acid/Poly(butylene adipate?co?terephthalate)/Poly(methyl methacrylate)?b?poly (butyl acrylate)?b?poly (methyl methacrylate)ternary blends (PLA/PBAT/MAM) were prepared by melt blending, and the effect of MAM relative molecular weight on the morphology, structure and properties of the blends was investigated. The results showed that the addition of MAM block copolymer can inhibits the crystallization of PLA，improve the compatibility of PLA/PBAT, reduce the particle size of the dispersed phase and make the distribution more uniform, improve the impact properties and elongation at break of the blends. And the relative molecular weight of MAM increased, the impact strength and elongation at break of the blend increased, the smaller the size of the dispersed phase particles, and the more uniform of particle size distribution.

辽宁省“兴辽英才计划”项目(XLYC1907188);辽宁省教育厅项目(L202006)

10.12422/j.issn.1672-6952.2024.01.002