PLA/PBAT/PCL生物降解复合材料的制备及其性能分析  

Preparation and properties of PLA/PBAT/PCL biodegradable composites

作　　者：周志斌[1] 刘跃军[1] 崔玲娜 文涛[1] 

机构地区：[1]湖南工业大学包装新材料与技术重点实验室,湖南株洲412007

出　　处：《功能材料》2016年第5期231-237,242,共8页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(11372108);湖南省自然科学基金资助项目(14JJ5021);湖南省高校创新平台开放基金资助项目(13K098)

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。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.

关 键 词：PLA/PBAT/PCL 热性能 力学性能 流变性能 

分 类 号：TB332[一般工业技术—材料科学与工程]