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Synthesis of block copolymers by changing living anionic polymerization into living ring opening metathesis polymerization.

Castle, T. C. and Hutchings, L. R. and Khosravi, E. (2004) 'Synthesis of block copolymers by changing living anionic polymerization into living ring opening metathesis polymerization.', Macromolecules., 37 (6). pp. 2035-2040.

Abstract

A series of AB diblock copolymers have been synthesized by transformation of living anionic polymerization into ring opening metathesis polymerization (ROMP). Ethylene oxide was polymerized anionically using diphenylmethylpotassium as the initiator and was terminated with vinylbenzyl chloride to produce a series of poly(ethylene oxide) (PEO) macromonomers with a terminal vinyl group. An alkylidene exchange reaction was then realized with ruthenium propylidene complex RuCl2(=CHC2H5)(PCy3)(2), transforming PEO macromonomers into ruthenium ROMP macroinitiators. A variety of norbornene derivatives were then subjected to ROMP using PEO macroinitiators to synthesize well-defined block copolymers of varying molecular weights and compositions.

Item Type:Article
Full text:Full text not available from this repository.
Publisher Web site:http://dx.doi.org/10.1021/ma030418s
Record Created:20 Apr 2007
Last Modified:08 Apr 2009 16:30

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