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Copolymerization of styrene and butadiene with Co(acac) 3 ‐methylaluminoxane catalyst
Author(s) -
Endo Kiyoshi,
Matsuda Yuichi
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20000801)201:13<1426::aid-macp1426>3.0.co;2-j
Subject(s) - copolymer , methylaluminoxane , catalysis , styrene , polymer chemistry , chemistry , triphenylphosphine , trifluoroacetic acid , materials science , metallocene , organic chemistry , polymerization , polymer
The copolymerization of Styrene (St) and butadiene (Bd) with Co(acac) 3 ‐MAO catalyst was investigated. The copolymers consisting of St and Bd with highly cis ‐1,4‐structure could be synthesized with Co‐(acac) 3 ‐MAO catalyst without formation of homopolymer, although the St contents in the copolymer were not high. The copolymer composition curve for copolymerization of St and Bd with the Co(acac) 3 ‐MAO is different from that obtained with the Ni(acac) 2 ‐MAO catalyst. The additive effects of triphenylphosphine (TPP) and trifluoroacetic acid (TFA) on the copolymerization of St and Bd with the Co(acac) 3 ‐MAO catalyst were also investigated. The copolymer yields increased by adding TPP to the Co‐(acac) 3 ‐MAO catalyst, although the St contents in the copolymer did not change. In the microstructure of the Bd units in the copolymers, 1,2‐contents increased remarkably. The copolymer yields and the microstructure of the copolymer did not change by addition of TFA.