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Graft polymerization of acrylamide onto UV‐irradiated films
Author(s) -
Uyama Y.,
Ikada Y.
Publication year - 1988
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.1988.070360509
Subject(s) - polymerization , irradiation , copolymer , polymer chemistry , monomer , materials science , photosensitizer , grafting , acrylamide , polypropylene , photochemistry , vinyl acetate , polymer , chemical engineering , chemistry , composite material , physics , nuclear physics , engineering
Abstract Graft polymerization of acrylamide was attempted onto the surface of films preirradiated with UV radiation. The films employed are nylon 6, polypropylene, and ethylene–vinyl acetate copolymers. Following UV irradiation in air on films without photosensitizer, they were placed in monomer solution, degassed, and then heated to 50°C to effect the graft polymerization. After rigorous removal of homopolymers, polyacrylamide chains were found to be grafted in the surface region of the films to amounts up to several hundred micrograms per square centimeter of films. An ESCA study revealed the UV‐irradiated but not yet grafted surfaces to be oxidized, and formation of peroxides was strongly suggested by the reaction of irradiated films with 1,1‐diphenyl‐2‐picrylhydrazyl. It is likely that the initiator responsible for the graft polymerization is peroxides generated at and near the film surfaces upon UV irradiation. The grafted films became very slippery when contacted with water, in contrast with the films UV‐irradiated but not yet grafted.