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Copolymerization of styrene and isoprene with Ni(acac) 2 ‐methylalumoxane catalyst
Author(s) -
Endo Kiyoshi,
Masaki Koji
Publication year - 1995
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.1995.030161101
Subject(s) - copolymer , isoprene , styrene , catalysis , polymer chemistry , nickel , monomer , reactivity (psychology) , materials science , polymerization , chemistry , organic chemistry , polymer , medicine , alternative medicine , pathology
Abstract Copolymerization of styrene (St) and isoprene (IP) with nickel(II) acetylacetonate [Ni(acac) 2 ] and methylalumoxane (MAO) catalyst was investigated. It was found that the Ni(acac) 2 ‐MAO catalyst is effective for the copolymerization of St and IP. From the copolymerization of St (M 1 ) and IP (M 2 ) and IP (M 2 ) with the Ni(acac) 2 ‐methylalumoxane catalyst, the monomer‐reactivity ratios were determined to be r 1 = 1,18 and r 2 = 0,88, i.e., ideal copolymerization was found to proceed to give perfectly random copolymers without formation of any homopolymer. The microstructure of IP units in the copolymers exhibits high cis‐1,4 contents.