Article

Coordination Homopolymerization of ω–undecenyl Poly(styrene-block-isoprene) Macromonomers in the Presence of CGC-Ti/MAO Complexes

  1. Edgar Catarí1,2,
  2. Frédéric Peruch1,
  3. François Isel1,
  4. Pierre Joseph Lutz1,*

Article first published online: 28 MAR 2006

DOI: 10.1002/masy.200690053

Issue

Macromolecular Symposia

Macromolecular Symposia

Special Issue: Olefin Polymerization

Volume 236, Issue 1, pages 177–185, March 2006

Additional Information

How to Cite

Catarí, E., Peruch, F., Isel, F. and Lutz, P. J. (2006), Coordination Homopolymerization of ω–undecenyl Poly(styrene-block-isoprene) Macromonomers in the Presence of CGC-Ti/MAO Complexes. Macromol. Symp., 236: 177–185. doi: 10.1002/masy.200690053

Author Information

  1. 1

    Institut Charles Sadron (UPR CNRS 22) 6, rue Boussingault - F-67083 Strasbourg Cedex, France

  2. 2

    Polymer Laboratory, Center of Chemistry, Venezuelan Institute of Scientifics Researchers (IVIC). 21827 Caracas, 1020-A Venezuela

*Institut Charles Sadron (UPR CNRS 22) 6, rue Boussingault - F-67083 Strasbourg Cedex, France

Publication History

  1. Issue published online: 28 MAR 2006
  2. Article first published online: 28 MAR 2006

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Keywords:

  • comb-shaped;
  • Constrained Geometry Catalyst (CGC);
  • homopolymerization;
  • macromonomer;
  • titanium;
  • ω-undecenyl poly(styrene-block-isoprene)

Abstract

This paper deals with the coordination homopolymerization of ω–undecenyl poly(styrene-block-isoprene) macromonomers. The synthesis of the macromonomers made use of an anionic living poly(styrene-block-isoprene) copolymer which is deactivated at low temperature by 11-bromo-1-undecene. The ability of these macromonomers to get involved in coordination homopolymerization in the presence of selected titanium catalysts was discussed. Special emphasis was given to the influence of polymerization temperature, macromonomer molar mass and concentration on the yield of homopolymerization and average degree of polymerization (DPn). In the presence of the CGC-Ti/MAO catalyst, macromonomer conversion, determined by SEC, was between 35 to 52 wt.-%, and DPn was between 5 to 14 depending upon the experimental conditions. However, as revealed by SEC/LS, the resulting comb-shaped polymers (PE-graft-(PI-block-PS), are characterized by sharp molar distributions. Increasing macromonomer molar mass, led to only a slight decrease of DPn whereas conversion increased moderately. Other titanium catalysts such as CpTiCl3/MAO and Cp*TiCl3/MAO only caused macromonomer dimerization.

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