滑石粉对PB-1熔融、结晶行为的影响  

Effects of Talcum on Melting and Crystallization Behaviors of Polybutylene-1

作　　者：孙剑[1] 李涛[1] 张俊平[1] 薛美玲[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《工程塑料应用》2012年第7期71-75,共5页Engineering Plastics Application

基　　金：国家自然科学基金项目(51173089);山东省科技攻关计划项目(2010GGX10332)

摘　　要：采用双螺杆挤出机熔融制备了聚丁烯–1(PB-1)/滑石粉复合材料,研究了滑石粉含量对PB-1熔融及结晶行为的影响。结果表明,滑石粉显著促进了PB-1的结晶过程,其成核能力在滑石粉质量分数为1%时最佳。非等温结晶动力学研究表明,在滑石粉的实验用量范围内(1%～10%),要达到相同的结晶度,PB-1/滑石粉复合材料的完成温度明显高于纯PB-1的完成温度。当滑石粉质量分数为1%～5%时,要达到相同的结晶度,PB-1/滑石粉所需的时间明显比纯PB-1短;当用量为7%时稍短;当用量为10%时又稍长。但滑石粉不影响PB-1的依热成核方式和三维生长机制。偏光显微镜结果表明滑石粉对PB-1的异相成核作用显著。广角X射线衍射研究表明滑石粉阻碍了PB-1由晶型Ⅱ向晶型Ⅰ的转变过程,使晶型转变变缓。The polybutylene-1 / talcum （ PB-I / talcum ） composites were prepared by twin-screw extruder, and effects of talcum on the melting and crystallization behaviors of PB-1 were investigated. The results showed that the crystallization process of PB-1 was accelerated by talcum. Talcum acted as a nucleation agent to PB-1 ＇s crystallization and its nucleation effect was optimum when its content was 1%.The investigations for the non-isothermal crystallization kinetics of PB-1 and PB-1 /talcum indicated that the temperature to reach a given crystallinity for PB-1 /talcum was much higher than that of pure PB-1 at the experimental talcum contents （ 1%- 10% ）. Moreover,the time to reach a given crystallinity for PB-1/talcum was much shorter than that of pure PB-1 as talcum content was 1% - 5%, and it was a little shorter as talcum was 7%, whereas it changed a little longer as talcum was 10%. The thermal nucleation mode and three dimensional growth mechanism of PB-1 ＇s crystallization were remained unchanged even though talcum was presented. The polarizing optical microscope results indicated that the nucleation effect of talcum on the crystallization of PB-1 was markedly, whereas the WAXD results showed that the transition process of crystalline form Ⅱ to form Ⅰ for PB-1 was retarded by the presence of talcum.

关 键 词：聚丁烯-1 熔融行为 结晶 结晶动力学 

分 类 号：TQ327.8[化学工程—合成树脂塑料工业]