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Investigation on the effect of the acid number of the plasticizer on some PVC properties

✍ Scribed by T. S. Gancheva; P. D. Dinev; K. G. Bukovska

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
404 KB
Volume
28
Category
Article
ISSN
0021-8995

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✦ Synopsis

The effect of polyester plasticizer of differing acid number on the properties of PVC compositions, to be used for electric insulation purposes, is investigated. It is established that the acid number affects both the temperature dependence of the specific bulk resistance in vitreous and highly elastic state and the process of formation of a polymer matrix with minimum ion diffusion factor. The assumption is made that the effects observed are due both to the different stability of plasticizers of differing acid number towards destruction a t thermal processing and to the difference in density of the polymer matrix depending on the acid number of the plasticize<. It is considered that polyester plasticizer (PEP) is a cheap and efficient plasticizer, which, irrespective of the nontraditional high acid number, could successfully be used for PVC plastication.

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