EFFECTS OF GAMMA RADIATION ON POLYMER IN SOLUTION. II. POLY(VINYL METHYL ETHER)

Journal Article · Thu Mar 01 04:00:00 EST 1962 · Bull. Inst. Chem. Research, Kyoto Univ.

OSTI ID:4840575

Sakurada, I; Ikada, Y

Polyvinylmethyl ether was degraded more easlly in better solvents when irradiated ln dilute air-free organlc solutions except in carbon disulflde, but in higher concentrated solutions crosslinklng proceeded more readily in solvents of lower viscosity. Gel was formed even at concentrations below l wt % in carbon disulflde; the critical concentration for gel formation was nearly equal to that of an aqueous solution. The critical concentration in the case of polystyrene in carbon dlsulflde solution was about 0.l5 wt%. On the basis of the observed results, a role of solvent at the irradiation of polymer in solution was discussed in considerable detail, and it was found that the mechanlsm of radiolnduced reactlons could be satisfactorlly explained ln terms of formation or deactivation of macroradicals by the solvent radicals, and change ln the rate of the coupling or the cage-recombination reactions caused by the increase in mobillty, dilutlon, and solvation of polymers due to the solvent. (auth)

• Research Organization: Kyoto Univ.
• NSA Number: NSA-16-018772
• OSTI ID: 4840575
• Journal Information: Bull. Inst. Chem. Research, Kyoto Univ., Journal Name: Bull. Inst. Chem. Research, Kyoto Univ. Vol. Vol: 40
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
CARBON SULFIDES
COLLOIDS
ETHERS
FREE RADICALS
GAMMA RADIATION
METHYL RADICALS
POLYMERS
POLYSTYRENE
POLYVINYLS
QUANTITY RATIO
RADIATION EFFECTS
RADIOCHEMISTRY
SOLUTIONS
SOLVENTS
VISCOSITY