高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (7): 1156.

• 研究快报 • 上一篇    下一篇

新型单茂钛/改性甲基铝氧烷催化剂合成立构多嵌段聚丁烯-1

祝方明, 黄启谷, 黄东东, 伍青, 林尚安   

  1. 中山大学高分子研究所, 广州 510275
  • 收稿日期:1998-11-30 出版日期:1999-07-24 发布日期:1999-07-24
  • 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)资助课题

Syntheses of Multi-stereoblock Polybutene-1 with Novel Mono-cyclopentadienyltitanium/Modified Methylaluminoxane Catalyst

ZHU Fang-Ming, HUANG Qi-Gu, HUANG Dong-Dong, WU Qing, LIN Shang-An   

  1. Institute of Polymer Science, Zhongshan University, Guangzhou, 510275
  • Received:1998-11-30 Online:1999-07-24 Published:1999-07-24

摘要: 茂金属聚烯烃以其高附加值而受到广泛重视.有关桥联或非桥联二茂基金属催化剂用于合成无规、等规、间规聚丙烯和聚丁烯-1已有报道.Llinas等用rac-Et(CpMe4Ind)·TiCl2和甲基铝氧烷(MAO)催化剂合成了等规/无规立构嵌.

关键词: 茂金属催化剂, 甲基铝氧烷, 聚丁烯-1

Abstract: 1-Butene was polymerized using novel mono-(η5-pentamethylcyclopentadienyl) tribenzyloxy titanium Cp*Ti(OBz)3/modified methylaluminoxane(mMAO)as catalyst. The resulting multi stereoblock polybutene-1 was characterized by 13CNMR and DSC analysis. The influences of various oxidation state of titanium active species on1butene polymerization were investigated. It was indicated that Ti(Ⅳ) active species is in favour of producing polybutene-1. 13CNMR analyses of polymers obtained show that propagation of 1-butene involves primarily head to tail 1,2-insertions, with involving some head to head or tial to tail 2,1-misinsertions. There is a remarkable decrease in 2,1-misinsertions with decreasing temperature of polymerization. Regiopentad distribution indicates stereoblock polybutene-1 with melting temperature(Tm) comprising isotactic, syndiotactic and atactic multi sequences polybutene-1.

Key words: Metallocene, Methylaluminoxane, Polybutylene-1

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