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Photografting of acrylamide on ethylene–vinyl alcohol copolymer film
Author(s) -
Kubota Hitoshi,
Sugiura Atsushi,
Hata Yasuo
Publication year - 1994
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1994.210340311
Subject(s) - photografting , copolymer , grafting , polymer chemistry , materials science , vinyl alcohol , benzoyl peroxide , benzophenone , photoinitiator , vinyl chloride , acrylamide , polymerization , polymer , monomer , composite material
Photografting (λ > 300nm) of acrylamide on ethylene‐vinyl alcohol copolymer film (vinyl alcohol unit = 56 mol%, film thickness = 20μm) was investigated at 60°C in water medium, where photoinitiators were coated on the film earlier. The percent grafting decreased in the order of xanthone ≈ benzophenone > anthraquinone > benzoyl peroxide. The graft efficiencies in each sensitized system were less than 30%, showing a predominant formation of homopolymer. Grafting of acrylamide on the film was also initiated in systems with and without photoirradiation when ceric salt was used as an initiator. Based on electron probe microanalysis of the grafted films, the grafted chains of the sample prepared by photografting were distributed inside the film, while those of the sample prepared by ceric salt‐initiated grafting without photoirradiation were located mainly on the film surface. The grafted films prepared by the former system exhibited a higher moisture permeability than those prepared by the latter system.