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Preparation of poly(vinyl alcohol)‐grafted ion exchange resin and its catalytic activity. I. Photo‐induced graft copolymerization of vinyl acetate on ion exchange resin
Author(s) -
Arai Kenichiro,
Ogiwara Yoshitaka
Publication year - 1976
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.1976.070200726
Subject(s) - copolymer , ion exchange resin , polymer chemistry , vinyl alcohol , vinyl acetate , monomer , catalysis , saponification , hydrolysis , materials science , chemistry , nuclear chemistry , organic chemistry , polymer
Photo‐induced graft copolymerization of vinyl acetate on sulfonic acid‐type ion exchange resins was investigated. In the copolymerization on isopropylated resin, graft copolymers with graft ratios (mole ratio of monomer unit of grafts to that of the resin) of up to 0.18 were obtained, although in the copolymerization on the original resin graft copolymer was not obtained. It was found that the graft ratio showed a maximum with reaction time, and the maximum graft ratio increased with conversion of the resin from the Na salt to the Fe(III) salt. Poly(vinyl alcohol)‐grafted resins were obtained with saponification of the poly(vinyl acetate)‐grafted resins, and their catalytic activities on the hydrolysis of amylose were investigated. The catalytic activity of the resins was found to increase with increasing graft ratio at values above 0.10. In the present experiment, however, the maximum acceleration of the reaction was up to 1.5‐fold that of the original resin because of limited graft ratio.