Methacrylic Stereoblock Copolymers via the Combination of Catalytic Chain Transfer and Anionic Polymerization
Macromolecules2011Vol. 44(24), pp. 9517–9528
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Gemma C. Sanders, T.J.J. Sciarone, Hanneke M. L. Lambermont‐Thijs, Robbert Duchateau, Johan P. A. Heuts
Abstract
A novel synthetic pathway toward stereoblock copolymers by combining catalytic chain transfer polymerization with anionic polymerization is described. Catalytic chain transfer polymerization (CCTP) has been used to synthesize vinyl-terminated polymers, which, after the Michael addition of α-lithioisopropyl isobutyrate, were used as macroinitiators for the anionic polymerization of methacrylate-type monomers. The resultant polymer consists of a predominantly atactic block (originating from the free radical polymerization) and a more isotactoid or syndiotactoid block (originating from the anionic polymerization).
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