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Grafting of Vinyl-Type Polynorbornene on Polybutadiene and Polyisoprene

✍ Scribed by Michael Schroers; Jürgen Demeter; Kurt Dehnicke; Andreas Greiner

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
111 KB
Volume
203
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

High molecular weight vinyl‐type polynorbornene was obtained by polymerization of norbornene initiated by [NiBr(NPMe~3~)]~4~/B(C~6~F~5~)~3~. Polymerization in the presence of olefins resulted in termination of polynorbornene chains by olefinic moieties. Molecular weights of polynorbornenes terminated by vinylidene compounds are lower than those terminated by vinyl and vinylene compounds. Corresponding polymerizations with polybutadiene and polyisoprene yielded graft copolymers with polynorbornene as grafts without contamination by homopolymerized polynorbornene. Grafting reactions were proved by spectroscopy, GPC, and degradation experiments using OsO~4~.

GPC traces (refractometer detector) of PN obtained for the polymerizations of 2 in the presence of 4d.

magnified imageGPC traces (refractometer detector) of PN obtained for the polymerizations of 2 in the presence of 4d.

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