Study of radiation-induced polymerization of vinyl monomers adsorbed on inorganic substances. IV. Dose rate and temperature dependences in the styrene-silica gel system. [. gamma. radiation; reaction mechanisms]

Journal Article · Wed Dec 31 23:00:00 EST 1975 · J. Polym. Sci.; (United States)

OSTI ID:7313016

Fukano, K; Kageyama, E

In order to elucidate the mechanism of radiation-induced polymerization of styrene adsorbed on silica gel, the effects of dose rate and irradiation temperature were studied in detail. Monomer conversion increased with increasing dose rate and temperature. At the same conversion, the percent of grafting increased with decreasing dose rate and also with increasing temperature. In general, GPC spectra of graft polymers and homopolymers showed two peaks; the ratio of the two peaks changed with dose rate and irradiation temperature. The dose-rate exponents of the polymerization rate of four peaks were different from each other. The activation energies of radical polymerization and cationic polymerization were about 2.6 kcal/mole and 0 kcal/mole, respectively. Based on the results obtained, a reaction mechanism is proposed.

• Research Organization: Japan Atomic Energy Research Inst., Takasaki
• OSTI ID: 7313016
• Journal Information: J. Polym. Sci.; (United States), Journal Name: J. Polym. Sci.; (United States) Vol. 14; ISSN JPSCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ADSORBENTS
ADSORPTION
AROMATICS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DOSE RATES
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
GRAFT POLYMERS
HYDROCARBONS
IONIZING RADIATIONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYMERIZATION
POLYMERS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
SILICA GEL
SORPTION
SORPTIVE PROPERTIES
STYRENE
SURFACE PROPERTIES
TEMPERATURE EFFECTS