STUDIES ON THE IRRADIATION OF HIGH POLYMERS AT HIGH TEMPERATURES. III. THE GEL FORMATION OF UNPLASTICIZED POLY(VINYL CHLORIDE) CONTAINING POLYFUNCTIONAL MONOMERS BY IRRADIATION

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Doitai To Hoshasen (Japan) Discontinuedt) (Romania)

OSTI ID:4777484

Sakurada, I; Okada, T; Sera, N

Test results obtained from the irradiation of unplasticized PVC films by gamma rays from a 1000-c Co/sup 60/ source and by a Van de Graaff accelerator in the temperature range of 30 to 120 deg C are discussed. Gel formation was not observed - when the films were irradiated up to 30 Mr in air at 30 deg C, but it formed a dosage of 22 Mr in vacuo. The tendency to cross-linking increased with increasing temperature. The G-values of cross-linking in vacuo at 30, 70, 90, and 120 deg C were 0.12, 0.49, 1.9, and 2.4, respectively. A marked increase in G was observed above the glass transition tem perature. The intrinsic viscosity of the sol part in vacuo increased with dosage to a maximum value and then fell off, but it decreased in air between 30 and 70 deg C. In similar studies on samples containing a small amount of glycol, dimethylacrylate or triallyl cyanurate considerable discoloration was observed only at high temperatures. Very little discoloration was observed in the case of radiationinduced cross- linking of PVC containing a polyfunctional monomer. (OID)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-031647
• OSTI ID: 4777484
• Journal Information: Doitai To Hoshasen (Japan) Discontinuedt) (Romania), Journal Name: Doitai To Hoshasen (Japan) Discontinuedt) (Romania) Vol. Vol: 4; ISSN DOHOA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
ALCOHOLS
CHEMISTRY
CHLORIDES
COLLOIDS
COLOR
GAMMA RADIATION
GLYCOLS
HIGH TEMPERATURE
IRRADIATION
LAYERS
METHACRYLIC ACID
POLYMERIZATION
POLYMERS
POLYVINYLS
RADIATION DOSES
REACTION KINETICS
VACUUM
VAN DE GRAAFF ACCELERATORS
VISCOSITY