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Gamma-radiation effects on polymers—II. Poly(ethylene tetrachloro-o-phthalate) in dioxane solutions

✍ Scribed by N.A. Ghanem; M.A. El-Azmirly; M.I. Aly

Book ID
103071070
Publisher
Elsevier Science
Year
1970
Tongue
English
Weight
374 KB
Volume
6
Category
Article
ISSN
0014-3057

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✦ Synopsis

Abstraet--Poly(ethylene tetrachloro-o-phthalate) was irradiated in various concentrations in dioxane in a ~°Co cell. No degradation or crosslinking of the main chains was observed up to a dose of 236" 448 Mrad. The predominant effect is the rupture of the carbon-halogen bond and the capture of most of the halogen by hydrogen to give HCI. Experimental evidence show that hydrogen is extracted from the ethylene glycol part of the polyester by intramolecular reactions, and from the solvent. NMR measurements show probable atkylation of the aromatic part by reactive intermediate radiolysis products of dioxane.

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Saturated polyesters containing tetrachloro-¢-phthalate units were prepared, purified and then subjected to y-radiation in a 6°Co cell for various doses up to 236"448 Mrad, in air, in nitrogen and under vacuum (10-4-10 -~ mmHg). Considerable dehydrohalogenation together with systematic slight incre