MoS_2/PMMA纳米复合材料动态力学性能  

Dynamic Mechanical Property of MoS_2/PMMA Nano Composites

作　　者：王琼生[1] 王世铭[2] 孙燕丽 郑立群[2] 

机构地区：[1]福建师范大学材料科学与工程学院,福建福州350108 [2]福建师范大学化学与化工学院,福建福州350108 [3]福建生物工程职业技术学院药学系,福建福州350002

出　　处：《福建师范大学学报（自然科学版）》2014年第4期48-54,共7页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省科技厅重大项目(2010H6006)

摘　　要：以液相溶剂热合成和表面改性技术制备的纳米MoS2作为减磨与增强剂，耐磨性差的PMMA为聚合物基，借助超声分散与溶液热流延技术制备MoS2／PMMA纳米复合材料．通过动态力学热分析研究MoS2对PMMA动态力学行为的影响，并探讨材料的宏观组成、微观结构与动态力学性能之间的关系．实验表明，在低温段（〈110℃），MoS2对PMMA动态储能模量E′在质量分数0～15％范围呈现出随粒子加入量增加而升高，≥15％又呈下降的趋势，对动态损耗模量E″则随MoS2加入量增加呈下降趋势．在高温段（〉110℃），MoS2对E′和E″有提升作用，加入量越高E′和E″温升衰减越趋缓，E′相对稳定平台区间拓宽趋势越明显．MoS2／PMMA复合材料玻璃化转变温度tg和进入粘流态转变温度tf也随MoS2加入量增加向高温偏移，耐热性提高．The composite of polymethylmethacrylate （PMMA） filled with MoS2 nanoparticles, which have been synthesized through a mild solvothermal reaction and were surface-modified as anti- friction additive, was prepared by ultrasonic dispersion and heat flow solution technique. The MoS2 effect on PMMA dynamic mechanical property were investigated with dynamic mechanical thermal Analyzer, the relations among dynamic mechanical property, microstructure and macro component were discussed. The result shows that at low temperature moment （ 〈 110℃ ）, MoS2 can increase the dynamic storage modulus E′ of PMMA matrix with increasing content of noS2 in the range of 0 15%. While for the content 〉 15% , it decrease E′. But MoS2 can decrease dynamic loss modulus E″ with increasing content of MoS2. At high temperature moment （ 〉 110 ℃ ） , MoS2 can increase the E′ and E″ of PMMA matrix, and the E′ and E″ declines slower with temperature rising, the E′ （plateau region） stable area are extended obviously. The glass transition temperature （tg） and viscosity flow temperature （tf） of MoS//PMMA composites shift to higher temperature with increasing content of MoS2 , the mechanical property thermal stability of the composites improved obviously.

关 键 词：MOS2 PMMA 纳米复合材料 动态力学性能 DMTA 

分 类 号：TQ330.38[化学工程—橡胶工业] TQ330.7