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Block copolymers by the conversion of living lithium initiated anionic polymerization into living ruthenium ROMP.

Castle, T.C. and Khosravi, E. and Hutchings, L.R. (2006) 'Block copolymers by the conversion of living lithium initiated anionic polymerization into living ruthenium ROMP.', Macromolecules., 39 (17). pp. 5639-5645.

Abstract

This paper describes a method for the synthesis of well-defined AB block copolymers, where one block is synthesized via anionic polymerization initiated with alkyllithium compounds, and one by ring opening metathesis polymerization (ROMP) using well-defined ruthenium macroinitiators. This methodology was demonstrated by copolymerizing styrene with norbornene derivatives. Polystyrene was synthesized via living anionic polymerization initiated by sec-butyllithium, and functionalized to form macromonomers. These were used as precursors to well-defined ruthenium macroinitiators, the macromonomers being converted by an alkylidene exchange reaction with ruthenium propylidene initiator RuCl2(CHEt)(PCy3)2. These macroinitiators were used to initiate the ROMP of various norbornene derivatives in order to synthesize well-defined block copolymers with narrow molecular weight distributions.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Status:Peer-reviewed
Publisher Web site:http://dx.doi.org/10.1021/ma060769h
Publisher statement:This document is the Accepted Manuscript version of a Published Work that appeared in final form in Macromolecules, copyright © 2006 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://dx.doi.org/10.1021/ma060769h.
Date accepted:No date available
Date deposited:20 March 2015
Date of first online publication:August 2006
Date first made open access:No date available

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