Graft polymerization of acrylamide onto UV-irradiated films

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, de...

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Bibliographic Details
Published in:Journal of applied polymer science 1988-08, Vol.36 (5), p.1087-1096
Main Authors: Uyama, Y., Ikada, Y.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Polymer industry, paints, wood
Technology of polymers
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Summary: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.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.1988.070360509