摘要
用溶液絮凝法制备了碳纳米管含量为0.5%～5%的聚丙烯(PP)/多壁碳纳米管(MWNT)复合材料。SEM研究表明MWNT在复合材料中呈纳米级分散。用DSC法研究了MWNT含量对PP非等温结晶性能的影响,发现MWNT作为PP的成核剂,使PP的结晶峰温向高温方向移动;由于MWNT对PP链段运动的阻碍作用,非等温结晶峰温并不随MWNT含量增加而增加;复合材料的结晶总速率均比纯PP大,但在碳纳米管含量0.5%～5%范围内随MWNT含量增加总速率反而降低;MWNT的加入对材料的结晶度影响不大,复合材料中PP的结晶晶型没有改变。当MWNT含量为0.5%时,观察到PP的球晶尺寸降低。
Polypropylene/multi-wall carbon nanotube (MWNT) composites with MWNT content 0.5 wt%～ 5 wt% were fabricated by solution coagulation method. Scanning electron microscope (SEM) observation shows that the MWNT was well dispersed in the composites. The effects of MWNT content on the non-isothermal crystallization behavior of the composites were investigated by differential scanning calorimeter (DSC). It was found that MWNT acts as nucleating agent, the crystallization peak temperature (Tp) of the composite shifts to high temperature and is independent of the MWNT content. The overall crystallization rate of composites is higher than that of control PP and decreased with the increase of MWNT content (from 0.5 wt% to 5 wt%). The MWNT has no influence on the crystal style and crystallinity of PP. At the MWNT content of 0.5 wt%, a decrease of spherulite size was observed.
出处
《中国塑料》
CAS
CSCD
北大核心
2005年第4期23-28,共6页
China Plastics
基金
北京市教育委员会科技发展研究计划资助(KM200410012004)
关键词
复合材料
结品行为
碳纳米管
聚内烯
composite
crystallization behavior
carbon nanotube
polypropylene
