多壁碳纳米管/聚丙烯复合材料的结晶行为

李明轩; 彭雄厚; 邹华维; 刘鹏波

多壁碳纳米管/聚丙烯复合材料的结晶行为

高分子材料工程国家重点实验室, 四川大学高分子研究所, 成都 610065

基金项目: 高分子材料工程国家重点实验室自主课题(2030925123008)

详细信息

通讯作者:
刘鹏波,博士,教授,主要研究方向为聚合物共混及复合材料E-mail:plastic64@hotmail.com

中图分类号: TB332
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出版历程
- 收稿日期: 2011-07-04
- 修回日期: 2011-09-19
- 刊出日期: 2012-08-14

Crystallization behaviors of MWCNTs/PP composites

The State Key Lab. of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China

摘要

摘要: 采用表面接枝十六烷烃的方法对多壁碳纳米管(MWCNTs)进行改性, 通过溶液共混法制备多壁碳纳米管/聚丙烯(MWCNTs/PP)复合材料, 并研究了MWCNTs/PP的结晶行为。结果表明, 3%(质量分数)表面接枝十六烷烃的MWCNTs在PP基体中分散良好, 达到纳米级的分散。加入接枝MWCNTs后, PP的结晶结构未发生改变, 依然是α晶型。接枝MWCNTs对PP有异相成核的作用, 加入接枝MWCNTs使PP的成核及晶体生长方式发生变化。加入3%(质量分数)接枝MWCNTs 以后, PP的结晶温度升高了8℃, 结晶速率提高了1倍, 结晶度提高了3%, 球晶尺寸减小。
- 聚丙烯 /
- 多壁碳纳米管 /
- 接枝 /
- 复合材料 /
- 结晶
Abstract: Multi-walled carbon nanotubes(MWCNTs) were modified through grafting C₁₆ alkyl chains. MWCNTs/polypropylene(PP) composites were prepared through solution blending. The crystallization behaviors of MWCNTs/PP composites were studied. The experimental results show that 3% (mass fraction) grafted MWCNTs with C₁₆ alkyl chains could be dispersed very well in PP matrix.The grafted MWCNTs could be dispersed on nano-scale. The presence of the grafted MWCNTs does not change the α-crystal form of PP. The introduction of the grafted MWCNTS induces the heterogeneous nucleation of PP in the grafted MWCNTs/PP composites, which will affect the mechanism of nucleation and the crystal growth of PP. After the addition of 3% (mass fraction) grafted MWCNTs in the PP matrix, the crystallizing temperature is increased by 8℃, the crystallizing rate is improved one time, and the crystallinity of PP matrix is increased by 3%. Moreover, the spherulity size decreases.
- polypropylene /
- multi-walled carbon nanotube /
- grafting /
- composites /
- crystallization