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Effect of atmosphere on radiation‐induced crosslinking of polyethylene. Part III. Effect of various gases and effect of electric field
Author(s) -
Okada Yoichi
Publication year - 1963
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1963.070070328
Subject(s) - polyethylene , irradiation , atmosphere (unit) , electric field , materials science , hydrocarbon , molecule , analytical chemistry (journal) , chemistry , polymer chemistry , organic chemistry , thermodynamics , composite material , physics , nuclear physics , quantum mechanics
Polyethylene film was irradiated in various atmospheres, i.e., He, Ne, Ar, Kr, Xe, N 2 , NO, NO 2 , HO 2 , CO, CO 2 , CH 4 , C 2 H 6 , C 3 H 8 , and C 4 H 10 by γ‐rays from a Co 60 source. Xe, Kr, CO, and H 2 O (vapor) accelerate the radiation‐induced crosslinking as recently shown in case of N 2 O. In addition, saturated hydrocarbon gases seem to be accelerative. NO depresses the crosslinking markedly and CO 2 , mildly. On the other hand, NO 2 decomposes the polyethylene molecule without irradiation. Every other gas appears to be inactive. In relation to the effect of gas atmospheres, we examined their solubilities in polyethylene. N 2 O is one of the most soluble of the inorganic gases. An electric field was applied to polyethylene film during irradiation. The degree of crosslinking evidently decreases with applied field, whether the atmosphere is N 2 O or Ar.