高等学校化学学报

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (6): 1253.

• 研究快报 • 上一篇    下一篇

液晶共聚物作为β晶成核剂诱导等规聚丙烯结晶结构的研究

胡建设, 孔波, 钞春英, 孙静   

  1. 东北大学理学院分子科学与工程研究所, 沈阳 110004
  • 收稿日期:2009-02-23 出版日期:2009-06-10 发布日期:2009-06-10
  • 通讯作者: 胡建设, 男, 博士, 教授, 主要从事改性高分子材料和液晶高分子的研究. E-mail: hujs@mail.neu.edu.cn
  • 基金资助:

    教育部“新世纪优秀人才支持计划”项目(批准号: NCET-07-0160)和沈阳市自然科学基金(批准号: 1081228-1-02)资助.

Study on Liquid-crystalline Copolymers as a New β-Nucleator to Induce Crystallization Structure of Isotactic Polypropylene

HU Jian-She*, KONG Bo, CHAO Chun-Ying, SUN Jing   

  1. Institute of Molecular Science and Engineering, School of Science, Northeastern University, Shenyang 110004, China
  • Received:2009-02-23 Online:2009-06-10 Published:2009-06-10
  • Contact: HU Jian-She, E-mail: hujs@mail.neu.edu.cn
  • Supported by:

    教育部“新世纪优秀人才支持计划”项目(批准号: NCET-07-0160)和沈阳市自然科学基金(批准号: 1081228-1-02)资助.

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摘要：

为考察液晶分子的有序排列对PP结晶结构的影响, 确保所设计与制备的液晶聚合物在PP的结晶温度范围(90~140 ℃)内处于液晶态, 我们合成了一种新型向列相液晶共聚物(LCP-H2), 其液晶相温度范围位于47~186 ℃之间. 研究结果表明, LCP-H2对PP具有良好的成核效果, 且诱导PP中β晶相的形成. 本文采用广角X射线衍射(WAXD)重点探讨了LCP-H2的添加量与结晶温度等对PP结晶结构的影响.

关键词: 聚丙烯, 液晶共聚物, β晶成核剂, 结晶结构

Abstract:

The effect of a new liquid crystalline copolymer(LCP-H2) on the crystallization structure of isotactic polypropylene(iPP) was investigated using wide-angle X-ray diffraction. The experimental results show that LCP-H2 of low mass fraction can induce β-form in iPP. The nucleating activity of LCP-H2 mainly depended on its content and crystallization temperature. The content of β-form(Kβ) increased with increasing the nucleator content and crystallization temperature, Kβ value reached a maximum value(35%) when the nucleator mass fraction was 0.8% and the crystallization temperature was 125 ℃.

Key words: Polypropylene, Liquid-crystalline copolymer, β-Nucleator, Crystallization structure

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