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The effect of thermal processing on PVC—I. Chemical and physical changes in unstabilized PVC

✍ Scribed by Gerald Scott; Menashe Tahan; Joseph Vyvoda

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
405 KB
Volume
14
Category
Article
ISSN
0014-3057

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✦ Synopsis

Unstabilized PVC processed at 170 and 210 C was found to undergo immediate mechanochemically induced thermal oxidation with the formation of unsaturation and peroxides. The peroxides were partially in the form of cross-links between polymer molecules at this stage and were manifested in the form of solvent insoluble gel. Conjugated double bonds and colour formation both increased linearly with time. The evidence suggests that the initial mechano-chemical process sensitizes the polymer to subsequent thermal degradation.

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