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The influence of oxygen on radiation crosslinking and degradation of polymers at low irradiation doses
Author(s) -
Babić Dragan
Publication year - 1989
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19890280116
Subject(s) - irradiation , bond cleavage , polymer , oxygen , chain scission , polyethylene , polymer degradation , degradation (telecommunications) , chemistry , molar mass distribution , drop (telecommunication) , photochemistry , polymer chemistry , radiation , materials science , organic chemistry , catalysis , optics , telecommunications , physics , computer science , nuclear physics
The influence of oxygen on radiation cross‐linking and scission at low doses has been followed in order to explain anomalous drop of molecular weight found in polyethylene at low irradiation doses. The G ‐ values and yields of crosslinking and scission estimated on the basis of molecular weight measurements (by GPC) are much higher than those obtained through gel content determinations at higher doses. The possible explanations of such a peculiar behavior are suggested and discussed. The influence of oxygen, even when present in the form of air absorbed in the sample, was found to be an important factor of scission process in irradiated polymer.