Co$sup 60$ GAMMA-RAY INDUCED DEGRADATION OF BUTYL RUBBER AND ITS VULCANIZATES

Journal Article · Sat Dec 31 23:00:00 EST 1960 · Vysokomolekulyarnye Soedineniya

OSTI ID:4826346

Drozdovskii, V F; Shokhin, I A; Klauzen, N A

The Co/sup 60/ gamma-ray induced degradation of butyl rubber and of its vulcanizates at 25 deg was investigated. Vinylidene groups are formed on irradiation in air and vacuum, causing the appearance of 11.25 mu bands in the IR spectra. The results may be regarded as further confirmation of the similarity in the mechanism of degradation of butyl rubber and polyisobutylene effected by ionizing radiation. The degradation rate of unfilled butyl rubber vulcanizates is greater than that of the filled specimens. Sulfur vulcanizates are less rapidly degiaded than nonsulfur ones. The degradation of filled butyl rubber vulcanizates is accelerated by disulfides. The latter manifest greatest activity in the irradiation of sulfur vulcanizates. Oxygen accelerates only slightly the degradation of filled sulfur vulcanizates irradiated with Co/sup 60/ gamma-rays. A regenerate with good plastoelastic and satisfactory physicomechanical properties may be obtained on exposure of butyl rubber sulfur vulcanizates to doses of 25 - 10/sup 6/ and 49 - 10/sup 6/ r in air in the presence of p-tertbutylphenol disulfide. (tr-auth)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-16-025869
• OSTI ID: 4826346
• Journal Information: Vysokomolekulyarnye Soedineniya, Journal Name: Vysokomolekulyarnye Soedineniya Vol. Vol: 3
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
BUTYL RADICALS
BUTYLENE
COBALT 60
DECOMPOSITION
ELASTICITY
GAMMA RADIATION
GAMMA SOURCES
HEAT TREATMENTS
INFRARED RADIATION
IRRADIATION
ISOMERS
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
OXYGEN
PHENOLS
POLYMERS
RADIATION DOSES
RADIATION EFFECTS
REACTION KINETICS
REGENERATION
RUBBER
SPECTRA
SULFIDES
SULFUR
VACUUM
VULCANIZATION