IONIC POLYMERIZATION OF STYRENE IN METHYLENE DICHLORIDE BY IONIZING RADIATION

Journal Article · Sun May 01 04:00:00 EDT 1960 · Intern. J. Appl. Radiation and Isotopes

DOI:https://doi.org/10.1016/0020-708X(60)90158-7· OSTI ID:4154257

Okamura, S; Futami, S

Styrene was polymerized in methylene dichloride (homogeneous phase) by the irradiation of Co/sup 60/ gamma rays at -78 deg C. The polymerization rate measured was about two hundred times higher than the calculated radical polymerization rate at the same temperature. No oxygen effect was found. Addition of some organic compounds into the polymerization system showed the ionic character of the polymerization mechanism. The rate of polymerization increased proportionally with styrene concentration up to 1.5 mol/l and had linear dependence on the dose rate. The gamma ray induced copolymerization analysis of a 1: 1 mixture of sty rene and methyl methacrylate and a 3: 1 mixture of styrenb and p-methoxystyrene which showed the catioilc polymerization mechanism at low temperature. The polymerization mechanism that explains semi- quantitatively the experimental results was proposed. (auth)

• Research Organization: Kyoto Univ.
• NSA Number: NSA-14-022921
• OSTI ID: 4154257
• Journal Information: Intern. J. Appl. Radiation and Isotopes, Journal Name: Intern. J. Appl. Radiation and Isotopes Vol. Vol: 8
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALKANES
CHEMISTRY
COBALT 60
FREE RADICALS
GAMMA RADIATION
IONS
LOW TEMPERATURE
MATHEMATICS
METHACRYLIC ACID
METHYL RADICALS
ORGANIC CHLORINE COMPOUNDS
OXYGEN
POLYMERIZATION
QUANTITY RATIO
RADIATION DOSES
RADIATION EFFECTS
REACTION KINETICS
STYRENE