Effect of high pressure on radiation-induced cross-linking of synthetic rubbers
The effect of pressure on the radiation-induced cross-linking of synthetic rubbers, cis-1,4-polybutadiene, cis-1,4-polyisoprene, poly(TFE-propylene), poly(styrene-butadiene), poly(ethylene-propylene), and trans-1,4-polybutadiene were studied. A remarkable acceleration of cross-linking by compression for unsaturated polymers is attributed to an acceleration of the propagation reaction of cross-linking, which does not require long-range migration of radicals, by reduction of the distance between polymer chains at high pressure while the termination reaction, which requires long-range migration of radicals to recombine with each other, is reduced by the decrease in molecular mobility at high pressure. The presence of an optimum pressure was observed for radiation-induced cross-linking of cis-1,4-polyisoprene and TFE-propylene copolymer. This is explained by a significant change in molecular motion occurring due to the glass transition or crystallization at high pressure.
- Research Organization:
- Japan Atomic Energy Research Inst., Takasaki
- OSTI ID:
- 7120882
- Journal Information:
- J. Macromol. Sci., Part B; (United States), Journal Name: J. Macromol. Sci., Part B; (United States) Vol. 11:3; ISSN JMAPB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360401 -- Polymers & Plastics-- Preparation & Fabrication-- (-1987)
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CROSS-LINKING
ELASTOMERS
ELECTROMAGNETIC RADIATION
FLUORINATED ALIPHATIC HYDROCARBONS
G VALUE
GAMMA RADIATION
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCARBONS
IONIZING RADIATIONS
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
POLYENES
POLYISOPRENE
POLYMERIZATION
POLYMERS
POLYOLEFINS
POLYVINYLS
PRESSURE DEPENDENCE
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RUBBERS
VERY HIGH PRESSURE