Chin. J. Org. Chem. ›› 2018, Vol. 38 ›› Issue (6): 1544-1548.DOI: 10.6023/cjoc201801004 Previous Articles     Next Articles



王铁石a, 陈建军b, 叶霖a,c, 张爱英a,c, 冯增国a,c   

  1. a 北京理工大学材料学院 北京 100081;
    b 中国石油化工股份有限公司北京化工研究院燕山分院 北京 102500;
    c 北京市结构可控先进功能材料与绿色应用重点实验室 北京 100081
  • 收稿日期:2018-01-04 修回日期:2018-02-09 发布日期:2018-03-08
  • 通讯作者: 冯增国,
  • 基金资助:


Synthesis of Tritertbutylphosphinimine Phenoxy Titanium Complexes and Their Catalytic Performance to Ethylene Polymerization

Wang Tieshia, Chen Jianjunb, Ye Lina,c, Zhang Aiyinga,c, Feng Zengguoa,c   

  1. a School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081;
    b Sinopec Yanshan Branch, Beijing Research Institute of Chemical Industry, Beijing 102500;
    c Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, Beijing 100081
  • Received:2018-01-04 Revised:2018-02-09 Published:2018-03-08
  • Contact: 10.6023/cjoc201801004
  • Supported by:

    Project supported by the Technology Development Project of China Petroleum & Chemical Corporation (Sinopec) (No. 214002).

Tritertbutylphosphinimine phenoxy titanium complexes (t-Bu3)PNTi(OAr)Cl2 [Ar=C6H5(4a), 2,6-Me2C6H3 (4b), 2,6-i-Pr2C6H3 (4c) and 2,6-t-Bu2C6H3 (4d)] were synthesized via the reaction of corresponding substituted phenol lithium salts with tritertbutylphosphinimine trichloride titanium (3). The compounds were characterized by means of 1H NMR, 13C NMR, 31P NMR spectroscopic and elemental analyses, and the molecular structures of 3, 4b and 4d were further confirmed by single-crystal X-ray diffraction analysis. When activated with methylaluminoxane (MAO), 4a~4d displayed not only high catalytic activities, but also increasing performances on ethylene polymerization with increasing the sterical hindrance of substituents. Furthermore, 4c depicted a good thermal stability, with which the polyethylene products of different molecular weights and molecular weight distributions can be obtained by tuning the polymerization conditions.

Key words: tritertbutylphosphinimine, substituted phenoxy, titanium complex, ethylene polymerization