聚苯硫醚/纳米二氧化硅复合材料的非等温结晶动力学及动态力学性能  

Crystallization Behavior and Dynamic Mechanical Properties of Poly(phenylene sulfide)/Nano-SiO_2 Composites

作　　者：朱怀远[1] 余兴海[1] 倪秀元[2] 

机构地区：[1]复旦大学材料科学系,上海200433 [2]复旦大学高分子科学系,上海200433

出　　处：《功能高分子学报》2005年第4期635-641,共7页Journal of Functional Polymers

基　　金：上海纳米科技与产业发展促进中心资助

摘　　要：用DSC法研究了聚苯硫醚(PPS)及其纳米SiO2复合材料的非等温结晶动力学,分析了结晶峰值温度Tp以及结晶起始温度T0等参数,并采用莫志深方程研究了复合材料的非等温结晶动力学。结果表明,莫志深方程能够较好地描述复合材料的非等温结晶动力学,纳米SiO2在PPS基体中起异相成核作用,而使得纳米复合材料的结晶速率明显快于纯聚合物的结晶速率。动态力学分析研究结果表明,纳米SiO2的加入提高了PPS的储能模量,Tg向高温方向移动,说明纳米SiO2与PPS之间存在着较强的相互作用。Non-isothermal crystallization behaviors of the composites consisted of poly（phenylene sulfide） and silicon dioxide nanoparticles were studied by means of differential scanning calorimetry. The Mo equation is firstly used to analyze the differential scanning calorimetry data. The results show that Mo equation can characterize the non-isothermal crystallization behavior of PPS and its composites. SiO2 gives a remarkable heterogeneous nucleation effect on the PPS matrix. The rate of crystallization of PPS/ nano-SiO2 composite is higher than that of virgin PPS. Dynamic mechanical analysis （DMA） indicate significant improvements in the storage modulus with the addition of nanoparticles. The tanδ peaks signifying the glass-transition temperature of PPS shift to higher temperature. It is shown that there must be some trong intereaction between nano-SiO2 and PPS.

关 键 词：聚苯硫醚 纳米SiO2 非等温结晶 动态力学分析 

分 类 号：O633[理学—高分子化学]