Electrical conductivity of modified poly(vinyl chloride)
| Autor: | M. Selvaraj, S Annadurai, Meenakshi Maruthamuthu |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Materials science
Analytical chemistry Chemical modification Atmospheric temperature range Conductivity Vinyl chloride chemistry.chemical_compound Aniline chemistry Mechanics of Materials Electrical resistivity and conductivity Yield (chemistry) Polymer chemistry General Materials Science Glass transition |
| Zdroj: | Bulletin of Materials Science. 16:273-286 |
| ISSN: | 0973-7669 0250-4707 |
| Popis: | Chemical modification of poly(vinyl chloride) (PVC) by dehydrochlorination with ethanolic KOH is found to yield modified PVC with conjugated polyene sequence. The semiconducting nature of ethoxide-modified PVC is illustrated with temperature dependence of conductivity (σ). The relative ratios (r) of conductivity,σmodifiedpvc/σunmodifiedpvc, are greater than unity in the temperature range 50° to 180°C,r being maximum in the vicinity of glass-transition temperature (Tg).Tg inferred from conductivity-temperature profiles is found to be greater for modified PVC relative to unmodified PVC, which is explicable in terms of restricted free rotation limiting segmental motion. For comparison with the conductivity andTg of ethoxide-modified PVC, LiCl-modified PVC and (aniline + S2O82−)-modified PVC have also been studied. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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