PLA/MMT-HTCC纳米复合材料的绿色合成、表征及热降解动力学分析  

Green Synthesis,Characterization and Thermal Degradation Kinetics of PLA/MMT-HTCC Nanocomposites

作　　者：汪凌[1] 甄卫军[1] 李亚瑜[1] 刘月娥[1] 庞桂林[1] 

机构地区：[1]新疆大学化学化工学院,新疆乌鲁木齐830046

出　　处：《中国塑料》2011年第6期42-48,共7页China Plastics

摘　　要：以乳酸锌为绿色催化剂,采用丙交酯开环聚合法制备了聚乳酸/壳聚糖季铵盐改性蒙脱土(PLA/MMT-HTCC)纳米复合材料。通过红外光谱、X射线衍射(XRD)、热重分析、扫描电子显微镜和透射电子显微镜进行了表征,采用Kissinger法和Ozawa法进行热降解动力学分析,得到材料的表观活化能。结果表明,PLA/MMT-HTCC为插层型纳米复合材料,PLA/MMT-HTCC的热分解峰值温度(Tp)比PLA最多高35.18℃,通过MMT-HTCC插层的实现,材料的热分解活化能得到了提高,从而提高了其热稳定性。PLA and PLA/MMT-HTCC nanocomposites were synthesized via ring-opening polymeri zation with zinc lactate as a green catalyst. The composite was characterized using FTIR spectrum, X-ray diffraction （XRD）, TG analysis ,scanning electron microscopy （SEM）, and transmission electron microscopy （TEM）. The thermal degradation kinetics was analyzed using Kissinger＇ s method and Ozawa＇s method, and the apparent activation energy was obtained. Because a fraction of PLA was intercalated into MMT-HTCC, the PLA/MMT-HTCC composite possessed a higher thermal degradation activation energy than that of neat PLA, the peak temperature of thermal decomposition of PLA/MMT-HTCC was 35.18℃ higher.

关 键 词：聚乳酸 蒙脱土 复合材料 合成 表征 热降解动力学 

分 类 号：TB332[一般工业技术—材料科学与工程]