IRRADIATION OF ORGANIC LOW MOLECULAR COMPOUNDS BY COBALT-60 GAMMA- RADIATION. II. POLYMERIZATION OF STYRENE (in Japanese)
Journal Article
·
· Tokyo Kogyo Shikensho Hokoku (Japan) Changed to J. Natl. Chem. Lab. Ind.
OSTI ID:4125401
Irradiations of organic compounds were performed with a Co/sup 60/ source of about 200 curies. Polymerization of styrene was studied with an additive by the irradiation of gamma rays at room temperature in vacuo. A value of acceleration efficiency R/sub E/ (R/sub E/ = R/sub p/ x R/sub M/ where R/sub p/ is the ratio of the polymerization rates and R/sub M/ is that of the viscosity average molecular weights of the polymer with and without an additive in the same experimental condition) was obtained from the result of the polymerization reaction, and it was disclosed that the value depended largely on the kind of the additive. An additive that had two functional groups in the molecule was added to styrene monomer in a concentration of 0.1 mole/liter. If the additive had a halogen and a hydroxyl group, only the latter would show an effect on the value of R/sub E/, whether it is an aliphatic or an aromatic compound. An additive that had a functional group in the molecule was added to styrene monomer in the concentration range of 0.02 to 0.2 mole/liter. Both the values of R/sub p/ and R/ sub M/ changed with the concentration of the additive, but the value of R/sub E/ remained almost constant and independent of the concentration change of the additive except in case of nitrobenzene. The values of chain transfer constant of the additives are also calculated. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-000247
- OSTI ID:
- 4125401
- Journal Information:
- Tokyo Kogyo Shikensho Hokoku (Japan) Changed to J. Natl. Chem. Lab. Ind., Journal Name: Tokyo Kogyo Shikensho Hokoku (Japan) Changed to J. Natl. Chem. Lab. Ind. Vol. Vol: 55; ISSN TKSHA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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