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3．26 kJ/m2增加到7．07 kJ/m2,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.
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 strength and tensile strength of composite reached to the maximum value;with the increase of the content of PBAT,the crystallization temperature Tc 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 1 5%,the in-itial decomposition temperature To of composite reached to 334.18 ℃;when the content of PBAT increased from 0% to 20%,the impact strength of the composite increased from 3.26 to 7.07 kJ/m2 ,while the elongation at break increased from 2.46% to 118.22%;The elasticity of the composite also increased with the concentration of PBAT.
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