Radiation-induced polymerization at high dose rate. II. cap alpha. -methylstyrene in bulk. [Electron beams; gamma rays]

Journal Article · Tue Jan 01 04:00:00 EST 1980 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1980.170180118· OSTI ID:5279456

Hayashi, K; Kotani, N

Bulk polymerization of ..cap alpha..-methylstyrene was carried out in a wide dose rate range, 7.6 to 256 rad/sec by ..gamma.. rays and 8.5 x 10/sup 3/ -2.1 x 10/sup 5/ rad/sec by electron beams. At high dose rate by electron beams, cationic polymerization took place along with formation of oligomeric product of DP/sub n/ = approx. 4. At low dose rate by ..gamma.. rays, radical polymerization was found to occur in water-saturated monomer. The cationic polymerization at high dose rate proceeds with essentially the same mechanism as was already known in ..gamma..-ray polymerization of dry monomers. Relatively low reaction rate of the cationic polymerization compared with that of styrene is explained with the fact that the propagation of ..cap alpha..-methylstyrene is much more easily inhibited by a slight amount of water. 9 figures.

• Research Organization: Japan Atomic Energy Research Inst., Osaka
• OSTI ID: 5279456
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Chem. Ed.; (United States) Vol. 18:1; ISSN JPLCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
AROMATICS
BEAMS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DOSES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
GAMMA RADIATION
HYDROCARBONS
HYDROGEN COMPOUNDS
IONIZING RADIATIONS
KINETICS
LEPTON BEAMS
MONOMERS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PARTICLE BEAMS
POLYMERIZATION
RADIATION CHEMISTRY
RADIATION DOSES
RADIATION EFFECTS
RADIATIONS
REACTION KINETICS
STYRENE
WATER