ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Description / Table of Contents:
ESR-Untersuchungen an γ-bestrahltem Polysulfon (aus 2.2′-Bis(4-hydroxyphenyl)-propan und 4.4′-Dichlorodiphenylsulfon) und an niedermolekularen Modellsubstanzen (Diphenylsulfon, 2.2′-Diphenylpropan, Diphenyläther) zeigen, daß die meisten erzeugten Radikale im Polymeren durch Reaktion mit den aus den Methylgruppen frei gemachten Wasserstoffatomen erzeugt werden. In großer Menge entstehen cyclohexadienylartige Radikale sowie Phenoxy- und ArṠO2-Radikale. Für diesen Mechanismus der Radikalerzeugung sprechen ferner die Ergebnisse von Untersuchungen, in denen das Polymere freien Wasserstoffatomen aus einer H2-Gasentladung ausgesetzt wurde.
Notes:
ESR studies of γ-irradiated polysulphone (prepared from 2.2′-bis(4-hydroxyphenyl)-propane and 4.4′-dichlorodiphenyl sulphone) and its model compounds (diphenyl sulphone, 2.2′-diphenyl propane, diphenyl ether), suggest that the majority of radicals produced in the polymer are formed by the subsequent reactions of hydrogen atoms released from the pendant methyl groups by the action of the γ-radiation. Cyclohexadienyl-type radicals are produced in quantity together with phenoxy and ArṠO2 radicals. Supporting evidence for the mechanism is obtained from studies of the hydrogen atom bombardment of the polymer.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1972.021570109
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