Premium
Photo‐induced graft copolymerization of methyl methacrylate on poly(vinyl alcohol)
Author(s) -
Kubota Hitoshi,
Ogiwara Yoshitaka
Publication year - 1972
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.1972.070160416
Subject(s) - copolymer , vinyl alcohol , polymer chemistry , aqueous solution , methyl methacrylate , grafting , oxalic acid , methacrylate , chemistry , anthraquinone , hydrogen peroxide , polymer , materials science , organic chemistry
Photo‐induced graft copolymerization of methyl methacrylate on poly(vinyl alcohol) (PVA) was examined in aqueous solutions. In unoxidized samples, only a few percent of PVA used took part in the formation of grafts, and the percent grafting was very low. However, if Fe 2+ , Fe 3+ , anthraquinone‐2,7‐disulfonate, or oxalic acid was used as sensitizer, the percent grafting was somewhat improved. Among them, the effect of Fe 3+ was most remarkable. Oxidized PVA showed a higher initiating activity and was more susceptible to the sensitizing action of Fe 3+ than unoxidized PVA. As Fe 3+ has an ability to accelerate the photo‐induced scission reaction of PVA chains for both oxidized and unoxidized PVA, it is thought to be very probable that the copolymer formed in the photo‐induced systems has a block polymer‐type structure like that in systems initiated by ceric ion or hydrogen peroxide.