高等学校化学学报 ›› 2003, Vol. 24 ›› Issue (11): 2119.

• 研究简报 • 上一篇    下一篇

间同立构1,2-聚丁二烯的合成和形态结构研究

陈晔1, 杨德才1, 胡雁鸣2, 张学全2   

  1. 1. 中国科学院长春应用化学研究所高分子物理与化学国家重点实验室;
    2. 高分子工程实验室, 长春 130022
  • 收稿日期:2003-02-27 出版日期:2003-11-24 发布日期:2003-11-24
  • 通讯作者: 杨德才(1940年出生),男,研究员,博士生导师,主要从事高分子凝聚态结构研究.E-mail:dcyang@ciac.jl.cn E-mail:dcyang@ciac.jl.cn
  • 基金资助:

    国家自然科学基金(批准号:20234020);国家重大基础研究发展规划项目(批准号:G1999064805)资助

Synthesis and Morphological Structure of Crystalline Syndiotactic 1,2-Polybutadiene

CHEN Ye1, YANG De-Cai1, HU Yan-Ming2, ZHANG Xue-Quan2   

  1. 1. State Key Laboratory of Polymer Physics and Chemistry;
    2. Polymer Engineering Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
  • Received:2003-02-27 Online:2003-11-24 Published:2003-11-24

关键词: 间同立构1, 2-聚丁二烯, 合成, 形态结构, 透射电子显微镜

Abstract: The crystalline syndiotactic 1,2-polybutadiene was synthesized in a catalytic system consisting of iron acetylacetonate [Fe(acac)3], triisobutylaluminum [Al(i-Bu)3] and diethyl phosphite (DEP), and its morphological structure waSInvestigated by transmission electron microscopy (TEM).The polymer with a melting point 179℃ was found to have 89.3% 1,2 polybutadiene and 86.5% syndiotacticity based on 13CNMR measurements.The bright field electron micrograph shows that the solution cast film of syndiotactic 1,2-polybutadiene consists of lamellae with lateral scale in micron size.It should be noted that the lamellae have no branching and they are almost parallel each other in localized areas.The lamellar growing direction is along b axis.Surprisingly, the electron diffraction pattern of the film only exhibits strong (hko) reflections, which indicate that the lamellae possess a single crystal-like orientation, i.e., with their c axis perpendicular to the film plane, while a and baxeSIn the film plane.According to the orthorhombic packing of plane zigzag chains, the cell parameters calculated from the electron diffraction pattern are a=1.102 nm, b=0.664 nm, respectively, which are completely consistent with the results reported by Natta et al..

Key words: Syndiotactic 1,2-polybutadiene, Synthesis, Morphological structure, Transmission electron microscopy

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