摘要
采用示差扫描量热法研究PP/纳米二氧化硅(SiO2)复合材料的非等温结晶动力学。研究结果表明:纳米SiO2起到异相成核的作用,使PP的结晶峰温升高;反应性增容增强了纳米SiO2的成核活性;添加纳米SiO2使PP的结晶活化能增大,反应性增容使复合材料的结晶活化能减小,与纯PP的结晶活化能相近;但反应性增容使PP的结晶总速率小于未增容填充体系。
The non-isothermal crystallization behavior of PP/nano-silica composites was studied by differential scanning calorimetry（DSC）. The results showed that the nano-SiO2 had a remarkable heterogeneous nucleation effect on the polymer matrix,and raised the PP composite＇ s peak crystallization temperature. Reactive eompatibilization enhanced the nucleation activity of the silica nanoparticles in the composites. Nano-SiO2 increased the activation energy of PP, however, reactive eompatibilization decreased the activation energy of PP composites, even closed to that of vigin PP. The overall rate of crystallization of reactive compatibilization system was lower than that of uncompatibilization system.
出处
《塑料》
CAS
CSCD
北大核心
2009年第4期39-41,84,共4页
Plastics
关键词
反应性增容
结晶动力学
成核活性
聚丙烯
纳米二氧化硅
reactive compatibilization
crystallization kinetics
nucleation activity
polypropylene
nano-silica
