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Formation of peroxide on poly(vinyl alcohol) and its characteristics
Author(s) -
Kubota Hitoshi,
Ogiwara Yoshitaka
Publication year - 1979
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.1979.070230806
Subject(s) - peroxide , hydrogen peroxide , sodium hypochlorite , vinyl alcohol , methyl methacrylate , aqueous solution , chemistry , hypochlorite , polymer chemistry , decomposition , copolymer , organic peroxide , alcohol , inorganic chemistry , organic chemistry , polymer
Peroxide formed on poly(vinyl alcohol) (PVA) fiber due to hydrogen peroxide (H 2 O 2 ) treatment was examined in terms of formation conditions, decomposition behavior, and function of graft initiation. By treating aqueous sodium hypochlorite‐ or periodic acid‐oxidized PVA with H 2 O 2 , formation of peroxide on the substrates was observed which was not on unoxidized PVA. The amount of peroxide increased proportionally to the carbonyl content of the sample, the level of which was higher of NaClO‐ than for HIO 4 ‐oxidized sample. The peroxide was decomposed by warming the sample in water to separate the H 2 O 2 . The reaction was easier for the HIO 4 ‐ than the NaClO‐oxidized sample. The structure of peroxide was assumed to be the α‐hydroxy hydroperoxide type for both NaClO‐ and HIO 4 ‐oxidized samples, which should be distinguished in respect to the location of the group. It is inferred that the peroxide on the NaClO‐oxidized sample is situated along the chain of PVA and that the one on the HIO 4 ‐oxidized sample is located mainly at the end of the chain. It was also observed that the peroxides formed on NaClO‐ and HIO 4 ‐oxidized samples are capable of initiating graft copolymerization of methyl methacrylate by means of heat or light.