Radiation-chemical processes in polyethylene at high pressures

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · High Energy Chem. (Engl. Transl.); (United States)

OSTI ID:5629333

Kiryukhin, V P; Klinshpont, E R; Milinchuk, V K

High pressures in the radiolysis of polyethylene exert a substantial influence on the formation of macroradicals and their reactions. At 300 degrees K and high pressures in polyethylene, primarily allyl macroradicals are stabilized; the yield of cross linking and destruction is decreased by a factor of 1.4 and 2, respectively. At 450 degrees K and 0.5 GPa, the formation of a gel is observed at 1 kGy with a yield of cross-linking of about 15-30. Cross-linking of polyethylene occurs according to a chain mechanism with the participation of the vinylidene double bonds. The high rate of migration of allyl macroradicals can be detected by a decrease in the height and narrowing of the potential barrier of the reactions of macroradicals.

• Research Organization: L.Y. Karpov Physicochemical Sci-Res. Institute
• OSTI ID: 5629333
• Journal Information: High Energy Chem. (Engl. Transl.); (United States), Journal Name: High Energy Chem. (Engl. Transl.); (United States) Vol. 19:2; ISSN HIECA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360605 -- Materials-- Radiation Effects
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ALKYL RADICALS
ALLYL RADICALS
CHEMICAL BONDS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
CROSS-LINKING
DECOMPOSITION
DISPERSIONS
DOUBLE BONDS
GELS
KINETICS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
POLYETHYLENES
POLYMERIZATION
POLYMERS
POLYOLEFINS
PRESSURE DEPENDENCE
RADIATION CHEMISTRY
RADIATION EFFECTS
RADICALS
RADIOLYSIS
REACTION KINETICS
VINYLIDENE RADICALS
YIELDS