RADIATION-INDUCED GRAFT COPOLYMERIZATION OF POLYVINYL ALCOHOL. V. THERMAL GRAFTING OF METHYL METHACRYLATE TO POLYVINYL ALCOHOL FILMS $gamma$-IRRADIATED IN AIR

Journal Article · Thu Sep 01 00:00:00 EDT 1960 · Doitai To Hoshasen (Japan) Discontinuedt) (Romania)

OSTI ID:4814957

Sakurada, I; Okada, T; Kugo, E

The samples prepared by irradiating dry PVA films between 0.066 to 0.149 mm were irradiated first in air at 0.2 to 0.13 Mr/hr up to 46 to g.1 Mr, respectively, with gamma rays at temperatures between 12 to 20 deg C, immersed in various mixtures of monomer solutions, and evacuated to a pressure less than 10/sup -4/ mm Hg. Graft copolymerization was observed when the samples were heated between 30 to 80 deg C for 22 to 24 hr. The grafting efficiency was 97% at 40 deg C but decreased to 64% at 80 deg C. It was concluded that active centers of PVA films were responsible for diperoxides as well as the hydroperoxides and trapped radicals. Grafting appeared only in the presence of water. (OID)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-022190
• OSTI ID: 4814957
• Journal Information: Doitai To Hoshasen (Japan) Discontinuedt) (Romania), Journal Name: Doitai To Hoshasen (Japan) Discontinuedt) (Romania) Vol. Vol: 3; ISSN DOHOA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
ALCOHOLS
CHEMISTRY
EFFICIENCY
FILMS
FREE RADICALS
GAMMA RADIATION
GRAFT POLYMERS
HEATING
HYDROGEN PEROXIDES
IRRADIATION
METHACRYLIC ACID
METHYL RADICALS
MIXING
MONOMERS
OXIDES
PEROXIDES
POLYMERIZATION
POLYMERS
POLYVINYLS
PVA
RADIATION CHEMISTRY
RADIATION DOSES
SAMPLING
SOLUTIONS
TEMPERATURE
THICKNESS
VACUUM
WATER