| 摘要 |
Graft polymers are produced by irradiating a shaped polymeric substrate with at least 0,01 watt-sec./cm2 of substrate surface of ionizing radiation in the presence of 1013 to 5 X 1016 molecules of oxygen/cm2 of substrate surface and subsequently contacting the irradiated substrate with a chemically distinct, unsaturated, polymerizable monomer with no additional access of oxygen. The polymeric substrate may be of polyethylene, polystyrene, polybutadiene, rubber, polyisobutylene, a butadiene-styrene capolymer, polyvinyl chloride, fluoride or acetate, polyvinylidene chloride, polychloroprene, polytetrafluorethylene, polymethyl methacrylate, polyethylene terephthalate, polyvinyl alcohol, cellulose, regenerated cellulose, polytetrahydrofuran, polyformaldehyde, a dioxolane polymer, a phenol-, urea- or triazine-formaldehyde condensation polymer, a polyamide or polyimide, polyacrylonitrile, a polyvinyl acetal, cotton, wool or silk, and may be in the form of a knitted or woven fabric, film, fibre, tube, pipe beading, tape, extruded moulding, wire covering or powder. The monomer may be vinyl chloride, fluoride, benzoate or acetate, vinylidene chloride, tetrafluoroethylene, acrylonitrile, methacrylonitrile, an alkyl acrylate, chloroacrylate or methacrylate, propiolic acid, phenyl propiolic acid, ethyl propiolate, styrene, methyl styrene, chlorostyrene, butadiene, isoprene, chlorobutadiene, a vinyl ketone or vinyl ether or divinyl ether. Irradiation may be by particle radiation such as accelerated electrons or by electromagnetic radiation such as X-rays. Reference has been directed by the Comptroller to Specification 809,838.ALSO:Graft polymers are produced by irradiating a shaped polymeric substrate with at least 0.1 watt-sec./cm.2 of substrate surface of ionizing radiation in the presence of 1013 to 5 X 1016 molecules of oxygen/cm.2 of substrate surface and subsequently contacting the irradiated substrate with a chemically distinct, unsaturated polymerizable monomer with no additional access of oxygen (see Group IV(a)). Reference has been directed by the Comptroller to Specification 809,838.
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