Chain-Shuttling Polymerization at Two Different Scandium Sites: Regio- and Stereospecific "One-Pot" Block Copolymerization of Styrene, Isoprene, and Butadiene

To each his own: Copolymerization of styrene and isoprene by catalysts Sc1 (syndiospecific for styrene) and Sc2 (cis‐1,4‐specific for isoprene) with a chain‐shuttling agent iBu3Al gives block copolymers of syndiotactic polystyrene (sPS) and cis‐1,4‐polyisoprene (PIP). Replacement of Sc2 with Sc3 (hi...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2011-12, Vol.50 (50), p.12012-12015
Main Authors: Pan, Li, Zhang, Kunyu, Nishiura, Masayoshi, Hou, Zhaomin
Format: Article
Language:English
Subjects:
Block copolymers
chain shuttling
Chains (polymeric)
Copolymerization
Copolymers
Isoprene
Polymerization
Scandium
Spark plasma sintering
Styrenes
syndiotactic polystyrene
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Summary:To each his own: Copolymerization of styrene and isoprene by catalysts Sc1 (syndiospecific for styrene) and Sc2 (cis‐1,4‐specific for isoprene) with a chain‐shuttling agent iBu3Al gives block copolymers of syndiotactic polystyrene (sPS) and cis‐1,4‐polyisoprene (PIP). Replacement of Sc2 with Sc3 (high 3,4‐selectivity for isoprene polymerization) gives selectively copolymers having sPS and 3,4‐PIP blocks.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201104011