THE CARBANIONIC MECHANISM OF POLYMERIZATION UNDER THE ACTION OF $gamma$- RAYS
An investigation of the gamma -ray-induced polymerization of acrylonitrile at -78 deg in various solvents showed that polymerization did not occur in solvents with electron acceptor properties: ethyl chloride, acetonitrile, heptane, ethyl acetate, acetone, toluene, and propionitrile. At this temperature and at a dose rate of 128 rad/sec, the rate of polymerization of acrylonitrile was 2.1 x 10/sup 6/ in the bulk,'' 1.57 x 10/sup 6/ in isopropylamine, 6.7 x 10/sup 6/ in triethylamine, 9.7 x 10/sup 6/ in dimethylformamide (the acrylonitrile concentration was 3.5 mol/l). The polymerization rate of acrylonitrile in triethylamide (3.5 mol/l) increased with a decrease in temperature from -50 to -112 deg (dose rate of 110 rad/sec). The polymerization rate of acrylonitrile in dimethylformamide was proportional to the first power of the concentration. Acrylonitrile-styrene copolymers obtained at - 78 deg in dimethylformamide were enriched greatly in the nitrile component, r/ sub 1/ (acrylonitrile) = 33, r/sub 2/ (styrene) =-0.005. The copolymerization rate of acrylonitrile and styrene at - 78 deg in dimethylformamide (monomer concentration 3.5 mol/l) diminished with the addition of styrene to the acrylonitrile. Under these conditions styrene did not polymerize. (OID)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-16-023758
- OSTI ID:
- 4829818
- Journal Information:
- Vysokomolekulyarnye Soedineniya, Journal Name: Vysokomolekulyarnye Soedineniya Vol. Vol: 3
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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Related Subjects
ACETIC ACID
ACETONE
ACRYLIC ACID
ALKYL RADICALS
AMIDES
AMINES
CHEMISTRY
CHLORIDES
CONCENTRATION
CYANIDES
ELECTRONS
ETHYL RADICALS
FORMIC ACID
GAMMA RADIATION
HEPTANE
IRRADIATION
ISOPROPYL RADICALS
METHYL RADICALS
NITRILES
ORGANIC CHLORINE COMPOUNDS
POLYMERIZATION
POLYMERS
PROPIONIC ACID
PROPYL RADICALS
QUANTITY RATIO
RADIATION CHEMISTRY
RADIATION DOSES
REACTION KINETICS
SOLVENTS
STYRENE
TEMPERATURE
TESTING
TOLUENE