REACTION OF ORGANIC LOW MOLECULAR COMPOUNDS BY COBALT-60 GAMMA-RADIATION. II. POLYMERIZATION OF STYRENE

Journal Article · Fri Jul 01 04:00:00 EDT 1960 · Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi

OSTI ID:4082587

Hamashima, M

Polymerization of styrene was carried out in the presence of an additive by irradiation of Co/sup 60/ gamma rays in vacuo at room temperature. A value of acceleration efficiency which depends on the kind of the additive, R/sup E/(R/ sup E/ = R/sup P/ x R/sup M/, where R/sup P/ is the ratio of the polymerization rate and R/sup M/ is that of the viscosity average molecular weight of the polymer with an additive and without it in the same experimental condition), is obtained from the results of the polymerization reaction. An additive which has two functional groups in the molecule is added to styrene monomer in a concentration of 0.1 mole/l. The additive, for example, when it has a halogen and a hydroxy group, only the hydroxy group shows an effect on the value of R/sup P/, whether it is an aliphatic or an aromatic compound. An additive that has a functional group in the molecule is added to styrene monomer in the concentration range from 0.02 to 0.2 mole/l. Both the values of R/sup P/ and R/sup M/ change with the concentration of the additive, but the value of R/sup E/ is almost independent of the concentration of the additive except in the case of nitrobenzene. The values of chain transfer constant of the additives are also calculated. (auth)

• Research Organization: Government chemical industrial Research Inst., Tokyo
• NSA Number: NSA-15-011007
• OSTI ID: 4082587
• Journal Information: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi, Journal Name: Nippon Kagaku Zasshi (Japan) Formerly Nippon Kagaku Kaishi (1921- 47) Merged with Kogyo Kagaku Zasshi to form Nippon Kagaku Kaishi Vol. Vol: 81; ISSN NPKZA
• Country of Publication: Country unknown/Code not available
• Language: Japanese

Related Subjects

ACCELERATION
ACCELERATORS
ADDITIVES
CHEMICALS
CHEMISTRY
COBALT 60
EFFICIENCY
ELEMENTS
GAMMA RADIATION
IRRADIATION
MOLECULES
NITROBENZENE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHENYL RADICALS
POLYMERIZATION
POLYMERS
REACTION KINETICS
STYRENE
TEMPERATURE
VACUUM
VELOCITY
VISCOSITY
WEIGHT