蒙脱土对PET结晶性能、热稳定性和力学性能的影响  

Effect of Montmorillonite on Crystallization Capacity,Thermal Stability and Mechanical Properties of PET

作　　者：郜君鹏[1] 李阳[1] 梁伯润[1] 栾广贵[1] 王依民[1] 

机构地区：[1]东华大学纤维材料改性国家重点实验室,上海200051

出　　处：《中国塑料》2004年第8期23-28,共6页China Plastics

基　　金：上海市科委重点项目 (编号 0 2 5 2 110 5 7)

摘　　要：通过熔融共混法制备了聚对苯二甲酸乙二醇酯 (PET) /蒙脱土复合材料 ,用X -射线衍射和透射电镜对蒙脱土在基体中的分散情况进行了表征。研究了蒙脱土对PET结晶性能、热稳定性和力学性能的影响。结果表明 ,蒙脱土在PET结晶过程中起异相成核作用 ,明显提高了PET的结晶速率 ;基体中分散的蒙脱土片层结构可显著改善其热稳定性 ,加入 3 % (质量含量 ,下同 )蒙脱土时 ,起始热分解温度提高 2 2℃ ,热变形温度提高 41℃ ;加入 1%时 ,材料拉伸强度提高 2 5 % ,缺口冲击韧性略有下降 。PET/montmorillonite (MMT) nanocomposites were prepared via melt-blending and the dispersion of MMT was studied using X-ray diffraction and transmission electron microscopy.It was found that MMT acted as a nucleating agent in the system and the crystallization rate of PET was obviously increased.When the MMT content was 3 %,the thermal decomposition onset temperature and the thermal deformation temperature of PET were increased by 22 ℃ and 41 ℃,respectively.When MMT content was 1 %,the tensile strength of the PET was increased by 25 % at the price of a little decrease in the notched impact strength.

关 键 词：蒙脱土 聚对苯二甲酸乙二醇酯 结晶性能 热稳定性 力学性能 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]