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Hydrogenation of Styrene‐Butadiene Rubber Catalyzed by Ru(CHCHPh)Cl(CO)(PCy 3 ) 2
Author(s) -
Pan Qinmin,
Rempel Garry L.
Publication year - 2004
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.200300275
Subject(s) - styrene , catalysis , styrene butadiene , natural rubber , copolymer , polymer chemistry , metal , double bond , materials science , chemistry , medicinal chemistry , organic chemistry , polymer
Abstract Summary: The hydrogenation of a copolymer of styrene and butadiene (SBR) catalyzed by Ru(CHCHPh)Cl(CO)(PCy 3 ) 2 was experimentally investigated within the temperature range of 120–160 °C, at P H 2of 300–1 200 psi, and a catalyst concentration of 10–78 × 10 −6 M . Special attention was paid to minimizing the catalyst metal residue and crosslinking in the product. The results indicated that high‐quality hydrogenated SBR was achieved without crosslinking and the metal residue was less than 7 ppm without a post‐treatment.IR spectra of the styrene–butadiene rubber before (a) and after (b) hydrogenation with the Ru(CHCHPh)Cl(CO)(PCy 3 ) 2 catalyst were observed as reported here. The disappearance of all characteristic absorbencies of CC (724, 910, 967, and 994 cm −1 ) suggests nearly quantitative hydrogenation of the CC bonds.