IMPROVEMENTS IN OR RELATING TO GRAFT CO-POLYMERS
A process is described for the manufacture of graft co-polymers (polyethylene) to momomeric vinyl compounds (acrylonitrile) by gamma radiation from a cobalt-60 source. Polyethylene is subjected to the radiation in the presence of oxygen to prcduce peroxidized active centers on the polyethylene. The peroxidized polymer is treated for at least 100 hrs with an excess of an organic solvent (methylene chloride or acetone) at room temperature. The solvent is insoluble so as to extract the small portion of soluble peroxide material prcduced on irradiation. The dried solventtreated polyethylene is then contacted with the acrylonitrile in the vapor phase at a raised temperature of up to 100 deg C and at sub-atmospheric pressure. A polymerization inhibitor is incorporated in the liquid phase of the grafting material. The polyethylene may be in the form of a film or a powder. (N.W.R.)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-027681
- OSTI ID:
- 4843679
- Report Number(s):
- GB 871572
- Country of Publication:
- United Kingdom
- Language:
- English
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