高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (6): 973.

• 论文 • 上一篇    下一篇

间同立构聚丙烯在聚乙烯(100)晶面上的附生行为研究

阎寿科1, 杨德才1, Petermann J.2   

  1. 1. 中国科学院长春应用化学研究所高分子物理开放实验室, 长春, 130022;
    2. 德国多特蒙德大学材料科学研究所
  • 收稿日期:1997-05-22 出版日期:1998-06-24 发布日期:1998-06-24
  • 通讯作者: 杨德才
  • 作者简介:阎寿科,男,34岁,博±,助研.
  • 基金资助:

    国家科委基础性研究重大关键项目基金

Epitaxial Crystallization of sPP on the (100) Lattice Plane of HDPE Crystals

YAN Shou-Ke1, YANG De-Cai1, Petermann J.2   

  1. 1. Polymer Physics Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022;
    2. Institute of Materials Science, Department of Chemical Engineering, University of Dortmund, D-44221 Dortmund, Germany
  • Received:1997-05-22 Online:1998-06-24 Published:1998-06-24

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被引次数

6

摘要： 利用电子显微镜的欠焦成像和电子衍射技术对间同立构聚丙烯(sPP)在高密度聚乙烯(HDPE)的(100)晶面上的结晶行为进行了研究,明场结果表明,sPP能在HDPE的(100)晶面上附生生长,形成相互交叉的草席状片晶结构,电子衍射结果证明,附生生长的sPP与HDPE的接触面为(100)晶面,sPP与HDPE的分子链方向成固定的±37.交角,说明sPP在纤维取向的HDPE基质上附生结晶不仅仅是HDPE的(110)晶面对sPP有取向成核作用,(100)HDPE晶面也可作为sPP晶体的取向成核点.

关键词: 间同立构聚丙烯, 高密度聚乙烯, 附生结晶, 形态结构

Abstract: Crystallization behavior of syndiotactic polypropylene(sPP) on the (100) lattice plane of high-density polyethylene(HDPE) crystals was studied by means of transmission electron microscopy and electron diffraction. The results indicate that sPPcrystals can grow epitaxially on the (100) PElattice plane with their chain directions ±37° apart from the chain direction of the HDPEsubstrate. The contact planes are (100) lattice planes for both polymers. This kind of epitaxy is explained in terms of parallel alignment of HDPEchains along the rows formed by the {CH3,CH2,CH3} groups in the (100) lattice plane of the sPPcrystals. This implies that in the epitaxial crystallization of sPPwith fiber oriented HDPEsubstrate, not only the (110) but also the (100) HDPE lattice planes can act as the oriented nucleation sites. Furthermore, according to the poor matching between HDPEchains in the (100) lattice plane and the {CH3,CH2,CH3} group rows in the (100) lattice plane of the sPPcrystals, it is concluded that the geometric matching is not the only controlling factor for the occurrence of polymer epitaxy.

Key words: sPP, HDPE, Epitaxial crystallization, Morphology

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