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Compressive Stress Effect on Dielectric Properties of Plasticized Poly(Vinyl-Chloride)

Želimir JELČIĆ ; PLIVA-Istraživanje i razvoj d.o.o., Zagreb
Nives BRAJKOVIĆ ; Elka Kabeli d.o.o.
Ivica PERČULIJA
Robert MLINARIĆ ; Prirodoslovno-matematički fakultet, Sveučilište u Zagrebu, Zagreb

Sažetak

Phase behaviour of poly(vinyl chloride) (PVC) mixtures with plasticizer (dioctyl-phthalate, di-2-ethylhexyl phthalate, DOP) is determined by measuring dielectric permittivity under compressive stress. The dependence of the measured dielectric parameters on the composition of mixtures, temperature and stress has been determined. The DOP contents affect significantly all the properties of the mixtures. The increase in the contents of the DOP plasticizer shifts the relaxation spectrum to lower temperatures, and the increase of compressive stress, towards higher temperatures, and reduces also the intensity of glass transition. Since increasing pressure densifies the material, analogous to lowering the temperature, a non-linear dependence of relaxation transitions on pressure is also expected and observed as shift to higher temperatures.

Ključne riječi

dielectric properties; plasticizer; poly(vinyl chloride) (PVC); compressive stress

Hrčak ID:

50521

URI

https://hrcak.srce.hr/50521

Datum izdavanja:

3.4.2010.

Podaci na drugim jezicima: hrvatski

Posjeta: 1.904 *