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Selective hydrogenation of olefinic bonds in styrene‐isoprene‐styrene triblock copolymer by palladium acetate catalyst
Author(s) -
Bhattacharjee Susmita,
Rajagopalan Padmavathy,
Bhowmick Anil K.,
Avasthi Bhola Nath
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070491113
Subject(s) - styrene , isoprene , copolymer , catalysis , palladium , double bond , polymer chemistry , acetone , chemistry , chloroform , homogeneous , polymer , organic chemistry , physics , thermodynamics
Homogeneous catalytic hydrogenation of styrene‐isoprene‐styrene triblock copolymer (SIS) has been carried out selectively at the carbon‐carbon double bond in the presence of palladium acetate catalyst under mild conditions. Degree of hydrogenation has been calculated with the help of infrared and nuclear magnetic resonance spectroscopic techniques. Almost 90 mol % complete hydrogenation has been achieved at 60°C under 1.4 MPa hydrogen pressure, 40 mg catalyst (for 2 g of polymer) in chloroform‐acetone solution for 1 h. © 1993 John Wiley & Sons, Inc.