高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (11): 1844.

• 论文 • 上一篇    下一篇

新型茂钛催化剂的分子设计与苯乙烯间规聚合

祝方明1, 林尚安1, 周文乐2, 涂建军2, 陈德铨2   

  1. 1. 中山大学高分子研究所, 广州, 510275;
    2. 上海石油化工研究院, 上海, 201208
  • 收稿日期:1997-10-07 出版日期:1998-11-24 发布日期:1998-11-24
  • 通讯作者: 祝方明,男,33岁,博士,讲师.
  • 作者简介:祝方明,男,33岁,博士,讲师.
  • 基金资助:

    国家自然科学基金(批准号:2934010)和广东省自然科学基金资助课题.

Molecular Design of Novel Metallocene Catalysts and Styrene Syndiospecific Polymerization

ZHU Fang-Ming1, LIN Shang-An1, ZHOU Wen-Le2, TU Jian-Jun2, CHEN De-Quan2   

  1. 1. Institute of Polymer Science, Zhongshan University, Guangzhou, 510275;
    2. Shanghai Institute of Petrochemistry and Engineering, Shanghai, 201208
  • Received:1997-10-07 Online:1998-11-24 Published:1998-11-24

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被引次数

27

摘要： 合成了CpTiCl3/MAO、Cp*TiCl3/MAO、Cp*Ti(OCH2CH＝CH2)3/MAO和cp*Ti(OMe)3/MAO四种均相催化体系.结果发现,[Cp*Ti(OCH2CH＝CH2)3]/甲基铝氧烷(MAO)催化体系热稳定性较高,在333～363K下进行苯乙烯问规聚合具有最高的催化活性;聚合反应产物用沸丁酮抽提8h,不溶部分间规聚苯乙烯(sPS)占总聚合产物重量的98%以上,sPS的分子量Mv达到4.15×105～2.46×105范围,熔融温度高达543K.

关键词: 金属茂, 茂钛催化剂, 甲基铝氧烷, 问规聚苯乙烯

Abstract: CpTiCl3, Cp*TiCl3, Cp*Ti(OMe)3 and Cp*Ti(OCH2CHCH2)3 were compared as styrene syndiospecific polymerization catalysts activated with methylaluminoxane(MAO) in toluene solution. G5-pentamethylcyclopentadienyltriallyloxy titanium Cp*Ti(OCH2CHCH2)3 /MAOis a highly active catalyst for styrene syndiospecific polymerization at 333～363 K. The influence factors of polymerization temperature and time, catalyst and styrene concentration on styrene polymerization have been studied. When the total polymerization product was extracted with boling butanone for 8 h, the insoluble fraction is over 98.7%. The syndiotactic polystyrene(sPS) obtained by extraction has high molecular weight(Mv=4.15×105～2.46×105) and high melting temperature(542.5～543 K) determined by DSC.

Key words: Metallocene, G5-Pentamethyclopentadienyltriallyloxy titanium catalyst, Methylaluminoxane, Syndiotactic polystyrene

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