Effects of electron beam preirradiation on the. gamma. radiolysis of polyethylene

Journal Article · Sat Mar 01 04:00:00 EST 1980 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1980.170180330· OSTI ID:5183386

Mitsui, H; Shimizu, Y

The ..gamma.. radiolysis of polyethylene preirradiated with electron beams to 3 Mrad was carried out at 30 to 100/sup 0/C in vacuo with a dose rate of 6.35 x 10/sup 5/ rad/hr. The hydrogen formation in the ..gamma.. radiolysis was little affected by the preirradiation of electron beams, whereas the formation of trans-vinylene unsaturation and gel was somewhat retarded. The rates of the formation of hydrogen and transvinylene unsaturation were described by the zero-order formation kinetics with respect to each concentraion combined with the first-order disappearance. The apparent rate constants and activation energies for the formation and disappearance of hydrogen and trans-vinylene unsaturation were almost independent of the preirradiation. The gel fraction was analyzed by using the Charlesby-Pinner equation. The G values of crosslinking and main chain scission were increased by the preirradiation, whereas their activation energies remained unaltered. On the basis of these results the effects of preirradiation on the reactions induced by ..gamma.. rays in polyethylene were discussed.

• Research Organization: Japan Atomic Energy Research Inst., Takasaki, Gunma
• OSTI ID: 5183386
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Chem. Ed.; (United States) Vol. 18:3; ISSN JPLCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
BEAMS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DATA
DATA FORMS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
EXPERIMENTAL DATA
GAMMA RADIATION
INFORMATION
IONIZING RADIATIONS
ISOLATED VALUES
LEPTON BEAMS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE BEAMS
POLYETHYLENES
POLYMERS
POLYOLEFINS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADIOLYSIS