高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (5): 823.

• 研究简报 • 上一篇    

聚合所得初生聚乙烯的晶型

伍青1, 张启兴1, 卢泽俭1, 王海华1, 欧阳巍1, 林尚安1, 张光华2   

  1. 1. 中山大学高分子研究所, 广州, 510275;
    2. 中国科学院广州化学研究所
  • 收稿日期:1994-06-01 修回日期:1994-09-26 出版日期:1995-05-24 发布日期:1995-05-24
  • 通讯作者: 伍青,男,40岁,博士,副教授.
  • 作者简介:伍青,男,40岁,博士,副教授.

Crystalline Forms in Nascent Polyethylene

WU Qing1, ZHANG Qi-Xing1, LU Ze-Jian1, WANG Hai-Hua1, OUYANG Wei1, LIN Shang-An1, ZHANG Guang-Hua2   

  1. 1. Institute of Polymer Science, Zhongshan University, Guangzhou, 510275;
    2. Guangzhou Institute of Chemistry, Academia Sinica, Guangzhou, 510650
  • Received:1994-06-01 Revised:1994-09-26 Online:1995-05-24 Published:1995-05-24

关键词: 聚乙烯, 结晶, 单斜晶, 颗粒形态国家自然科学基金资

Abstract: The crystalline structure of nascent polyethylene prepared by heterogeneous Ti-Mg catalyst has been studied.The reflection for the 001 planes in the monoclinic lattice from WAXD is more intense when the sample was synthesized at lower temperature, but remains constant for the samples at different polymerization yields. By treating the polyethylene powder by supersonic wave, a portion of the powder fell apart into smaller particles. Among the particles, a single crystal in monoclinic form was found by using TEM and electron diffraction.The generation of the monoclinic crystal is considered to be the presence of com pressive force in the polymerization process,which may arise from the crowding of the grow ing polymer globules.

Key words: Polyethylene, Crystalline, Monoclinic, Morphology

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