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Unexpected reactivities in chain shuttling copolymerizations
Author(s) -
Zinck Philippe
Publication year - 2016
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.5026
Subject(s) - copolymer , chain transfer , reactivity (psychology) , catalysis , polymerization , chain (unit) , thermoplastic elastomer , polymer chemistry , materials science , elastomer , polymer science , chemical engineering , chemistry , polymer , organic chemistry , radical polymerization , engineering , physics , medicine , alternative medicine , pathology , astronomy
Chain shuttling copolymerization ( CSP ) is a modern polymerization technique that allows in a one‐step procedure access to multiblock microstructures of statistical copolymer blocks of different compositions, providing notably new thermoplastic elastomers. The process involves the shuttling of a growing copolymeric chain between two catalysts showing different reactivity ratios versus the comonomers. The complexity of the active species formed in the presence of two catalysts and a chain transfer agent can give rise to unexpected reactivities. They are presented and discussed in this contribution, including their possible origin when provided and the consequences regarding the design of catalytic systems for CSP .