【作者】 郭凯； 申小清； 张媛媛； 陈金周； 牛明军； 刘玉坤； 李新法；

【Author】 GUO Kai a , SHEN Xiaoqing b , ZHAN Yuanyuan c , CHEN Jinzhou d , NIU Mingjun e , LIU Yukun f and LI Xinfa g School of Material Science & Engineering, Zhengzhou University, China

【机构】 郑州大学材料科学与工程学院；

【摘要】 为了提高PLLA的结晶性能和韧性,通过熔融挤出制备了PLLA/Talc/TBC复合材料,并使用热失重分析法(TG)和微分热失重分析法(DTG)研究了其热分解性能。PLLA/Talc(97:3)复合材料和PLLA/Talc/TbC(96:3:1)复合材料的热分解温度较纯PLLA分别提高了7.6℃和16.2℃。分别通过Ozawa–Flynn–Wall(OFW)方法和Friedman方法研究了纯PLLA和复合材料的热分解动力学,结果表明,PLLA/Talc/TbC复合材料的表观分解活化能在热分解起始阶段急剧增加。更多还原

【Abstract】 To enhance the crystallizability and flexibility, Poly L-lactide (PLLA)/ Talc/ tributyl citrate(TBC) composites were prepared via melt extrusion and investigated by thermogravimetry (TG) and derivative thermogravimetry (DTG). It was shown that the thermal decomposition temperature of PLLA/Talc (97:3) and of PLLA/Talc/TbC (96:3:1) had increased 7.6℃ and 16.2℃ respetively compared with pure PLLA. The thermal decomposition kinetics of pure PLLA and composites were studied by using the Ozawa–Flynn–Wall (OFW) and the Friedman methods respectively, the results indicated that the apparent activation energies of PLLA/Talc/TBC composites increased sharply in the initial stage of the mass loss.更多还原