The Dependence of Dielectric Response of an Elastomer on Hydrostatic Pressure.
Abstract
Dielectric methods have been employed to study the high pressure behavior of a polyurethane elastomer (Solithane 113) in the vicinity of its alpha-transition. The alpha-loss peak is shifted to higher temperatures and broadened somewhat with the application of hydrostatic pressure up to 6.4 kilobars. The slope of the T sub alpha versus P, or dT sub(alpha)/dP, obtained at low frequencies was found to be equal to dTg/dP obtained by volumetric method. Moreover, it attained a non-zero limiting value at high pressures for each frequency tested (3-30,000 Hz) and the limiting value itself increased with increasing frequency from 10.5 oc/kbar at 3Hz to 18 C/Kb at 30,000 Hz. The activation enthalpy was found to be nearly constant over the pressure range tested, but the activation volume decreased with increasing pressure. The relation (dT(sub alpha)/dP) = T(delta V*/delta H*) was shown to hold for the elastomer. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 15, 1982
- Accession Number
- ADA122340
Entities
People
- D. L. Questad
- K. D. Pae
Organizations
- Rutgers University–New Brunswick