华南理工大学学报(自然科学版) ›› 2006, Vol. 34 ›› Issue (1): 105-109.

• 材料科学与技术 • 上一篇    下一篇

聚丙烯/有机蒙脱土纳米复合材料的流变行为

丁超 贾德民何慧 郭宝春 李慧勇 颜莉   

  1. 华南理工大学 材料科学与工程学院,广东 广州 510640

  • 收稿日期:2005-02-18 出版日期:2006-01-25 发布日期:2006-01-25
  • 通信作者: 贾德民,教授,E—mail:psdmjia@scut.edu.cn E-mail:scutpolymer@163.com
  • 作者简介:丁超(1975-),男,博士生,主要从事聚合物纳米复合材料方面的研究
  • 基金资助:

    国家自然科学基金资助项目(20304003);广东省自然科学基金重点资助项目(020966);广东省自然科学基金团队资助项目(39172)

Rheological Behavior of Polypropylene/Organic Montmorillonite Nanocomposite

Ding Chao  Jia De-min  He Hui  Guo Bao-chun  Li Hui yong  Yan Li   

  1. College of Materials Science and Engineering,South China Univ.of Tech.,Guangzhou 510640,Guangdong,China
  • Received:2005-02-18 Online:2006-01-25 Published:2006-01-25
  • Contact: 贾德民,教授,E—mail:psdmjia@scut.edu.cn E-mail:scutpolymer@163.com
  • About author:丁超(1975-),男,博士生,主要从事聚合物纳米复合材料方面的研究
  • Supported by:

    国家自然科学基金资助项目(20304003);广东省自然科学基金重点资助项目(020966);广东省自然科学基金团队资助项目(39172)

摘要: 以聚丙烯固相接枝共聚物为界面改性剂制备了聚丙烯/有机蒙脱土纳米复合材料.用透射电镜表征了纳米复合材料的结构,研究了接枝物对纳米复合材料动态流变行为的影响,以及流变行为与温度的关系,结果表明:与纯聚丙烯相比,纳米复合材料具有较高的动态弹性模量、损耗模量和复合粘度,力学损耗因子则降低,纳米复合材料的复合粘度对温度的敏感性略高于聚丙烯;界面改性荆的加入增强了有机蒙脱土与聚丙烯的界面作用,与聚丙烯相比,纳米复合材料的流动活化能提高约15%,结晶峰温度提高l0K左右.

关键词: 聚丙烯, 有机蒙脱土, 纳米复合材料, 流变行为

Abstract:

Polypropylene/organic montmorillonite (PP/OMMT) nanocomposite was prepared by using a solid-phase-grafted PP(TMPP)as the interfacial modifier,whose nanostructure was then observed using transmission electron microscopy(TEM).The influence of TMPP on the dynamic rheological behavior of the nanocomposite and the relationship between the rheological behavior and temperature were also investigated.The results show that the dynamic elastic modulus,loss modulus and complex viscosity of the nanocomposite are higher than those of PP,while the loss factor is lower,that the complex viscosity of the nanocomposites is more sensitive to temperature,and that the flow activation energy and the crystallization temperature increase respectively by 1 5%and 1 0 K as coin-pared with PP,which may contribute to the enhanced interfacial interaction between PP and OMMT resulting from the addition of TMPP.

Key words: polypropylene, orgamic montmorillonite, nanocomposite, rheological behavior