## Abstract This article reports on the study of the thermal aging of poly(vinyl chloride) (PVC) used in mediumโ and highโvoltage cables. It is shown that the thermal aging leads to the degradation of the material and to the modification of its electrical properties. The degradation is all the more
Influence of thermal ageing on electrical properties of ethylenepropylene elastomers
โ Scribed by T. Zaharescu; L. Caramitu; F. Iliescu
- Publisher
- Springer
- Year
- 1996
- Tongue
- English
- Weight
- 210 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0261-8028
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Linear polyurethaneimide elastomers (PUI) were obtained from polyether-or polyesterdiols, diphenylmethane diisocyanate or bitolylene diisocyanate and pyromellitic acid dianhydride. It was found that these polymers have considerably better mechanical properties than typical linear polyurethanes (PU).
Two groups of Mn films with different mass thicknesses were evaporated onto quartz-glass substrates under vacuum conditions (p = IO-' Pa). The Mn films of the first group were thermally annealed at a temperature of approximately 674 K for half an hour. The other group of the films were obtained with