中文摘要：

以聚乳酸（PLA）和己二酸-对苯二甲酸-丁二酯共聚物（PBAT）为基材,聚己内酯（PCL）为相容剂,采用熔融共混法制备了PLA/PBAT/PCL复合材料,研究了所得复合材料的热性能、力学性能和流变性能。结果表明,当PCL含量为2%时,复合材料的冲击强度和拉伸强度达到最大值;随着PBAT含量的增加,复合材料的熔融结晶温度Tc逐渐降低,而其初始热分解温度To先上升后下降;当PBAT的含量为15%时,To最大,其值为334.18℃。当PBAT含量从0增加到20%时,复合材料的冲击强度从3.26kJ/m2增加到7.07kJ/m^2,其断裂伸长率则从2.46%增加到118.22%;另外,随着PBAT含量的增加,复合材料的熔体弹性增加。

英文摘要：

PLA and PBAT were blended in a twin-screw extruder with the compatilizer of PCL to provide PLA/PBAT/PCL composites. The thermal properties, mechanical properties and rheological performance of PLA/PBAT/PCL composites were studied.The results showed：when the content of PCL was 2 %, the impact strengthand tensile strength of composite reached to the maximum value;with the increase of the content of PBAT,thecrystallization temperature To of composite gradually decreased, while the thermal initial decomposition temper-ature To of composite presented a downward trend after rising first;when the content of PBAT was 15%, the in-itial decomposition temperature To of composite reached to 334.18℃ ;when the content of PBAT increased from0% to 20%,the impact strength of the composite increased from 3.26 to 7.07 kJ/m2,while the elongation atbreak increased from 2.46 % to 118.22 % ;The elasticity of the composite also increased with the concentration ofPBAT.