Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (9): 1028-1032.DOI: 10.11944/j.issn.1000-0518.2015.09.140452

• Full Papers • Previous Articles     Next Articles

Synthesis of ansa-(Cyclopentadienyl)(adamantylamido) titanium Complex for Propylene Polymerization

XU Bo,SUN Yanjie,DU Feipu,CAI Zhengguo()   

  1. State Key Lab for Modification of Chemical Fibers and Polymer Materials,College of Material Science and Engineering,Donghua University,Shanghai 201620,China
  • Received:2014-12-30 Accepted:2015-04-23 Published:2015-08-31 Online:2015-08-31
  • Contact: CAI Zhengguo
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21174026), Program for New Century Excellent Talents in University, the Program for Professor of Special Appointment(Eastern Scholar) at Shanghai Institutions of Higher Learning, “Shu Guang” Project Supported by Shanghai Municipal Education Commission and Shanghai Education Development Foundation and the Fundamental Research Funds for the Central Universities

Abstract:

(1-Adamantyl)NSiMe2(C5Me4)]TiMe2(c) was synthesized and characterized by elemental analysis, 1H NMR, and single-crystal X-ray analysis. Propylene polymerization was conducted with complex c using modified methyaluminoxane(MMAO)/butylated hydroxytoluene(BHT) as a cocatalyst to compare the polymerization activity of complex c with that of tert-butylamido complex(tBuNSiMe2(C5Me4)]TiMe2)(a). The c-heptane system shows an activity of 562 kg(PP)/(mol(Ti)·h) which is two times higher than that of a-heptane system indicating that the activity is improved by the introduction of 1-adamantyl substituent to the amido ligand.

Key words: constrained geometry catalyst, single-site catalyst, propylene polymerization