POLYMERIZATION AND SYNTHESIS OF GRAFT POLYMERS FROM NATURAL RUBBER AND FROM POLYSTYRENE BY GAMMA IRRADIATION
The synthesis and propenties of graft polymers from natural rubber with vinyl chloride and from polystyrene with acrylonitrile were studied and the synthesis of homopolymers by radiation polymerization of acrylonitrile, vinyl chloride, and furfuryl alcohol was inve stigated. The radiation polymerization of ethylene and of vinyl polymers was studied. Ampoules filled with a mixture of natural rubber and vinyl chloride were irradiated. The polymer resulting from gamma irradiation is not soluble, but swells slightly in some solvents (benzene, toluene, carbon tetrachloride, methylene chloride) and some solvent mixtures. The polymer obtained by grafting and irradiation has a more strongly ramified chain than the original rubber with a netlike structure resistant to solvents. The maximum amount of absorbed liquid per gram of polymer and the swelling rate constant drop a little with increasing dose. All graft polymers from natural rubber and vinyl chloride are more heat-resistant than the initial rubber. The mechanical properties and the electrical insulating quality of additionally vulcanized grafted rubber meet specified requirements on insulating rubber for the cable industry. The graft polystyrene polymer with acrylonitrile was produced by gamma irradiation (1.10/sup 6/ - 4.10/sup 6/ r) of a swelled polystyrene film. The amount of nonreacting polystyrene and of the copolymer drops with increasing radiation dose. The thermal resistivity of the initial and of the graft polymer is increased by the grafting of polystyrene with acrylonitrile. In addition, the graft polymer is more resistant to solvents than the initial polymer. Irradiation of acrylonitrile and vinyl chloride (starting material for the production of graft polymers) yielded polyacrylonitrile, polyvinyl chloride, and polyfurfuryl alcohol. (TCO)
- Research Organization:
- Tashkent State Univ.
- NSA Number:
- NSA-18-013890
- OSTI ID:
- 4080963
- Journal Information:
- Tr. Tashkentsk. Konf. po Mirnomu Ispol. At. Energii, Akad. Nauk Uz. SSR 1(1959), Journal Name: Tr. Tashkentsk. Konf. po Mirnomu Ispol. At. Energii, Akad. Nauk Uz. SSR 1(1959)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ALCOHOLS
BENZENE
CABLES
CARBON TETRACHLORIDE
CHEMICAL REACTIONS
CHEMISTRY
CONFIGURATION
CYANIDES
DIAGRAMS
DIELECTRICS
EFFICIENCY
ETHYLENE
EXPANSION
FABRICATION
FILMS
FURANS
GAMMA RADIATION
HEATING
HETEROCYCLICS
IRRADIATION
LATTICES
MEASURED VALUES
MECHANICAL PROPERTIES
METHYL RADICALS
MIXING
MOLECULES
NITRILES
OPERATION
ORGANIC CHLORINE COMPOUNDS
PERFORMANCE
POLYMERIZATION
POLYMERS
POLYSTYRENE
POLYVINYLS
PREPARATION
PYROLYSIS
RADIATION CHEMISTRY
RADIATION DOSES
REACTION KINETICS
RUBBER
SAMPLING
SOLUBILITY
SOLVENTS
TEMPERATURE
TESTING
TOLUENE
USES
VARIATIONS
VINYL RADICALS