Accession Number : AD0697887

Title :   STRESS-STRAIN PROPERTIES OF RUBBER AT PRESSURES ABOVE THE GLASS TRANSITION PRESSURE,

Corporate Author : AUSTRALIAN NATIONAL UNIV CANBERRA DEPT OF GEOPHYSICS AND GEOCHEMISTRY

Personal Author(s) : Weaver,C. W. ; Paterson,M. S.

Report Date : 26 SEP 1968

Pagination or Media Count : 6

Abstract : The influence of hydrostatic pressure in raising the glass transition temperature of an amorphous polymer is now well known. In particular, it has been shown that the glass transition temperature in natural rubber is raised to room temperature by a pressure of 5 kbar, and that there is a similar effect in synthetic rubbers. Until recently, there appear to have been no studies of the stress-strain properties of polymer glasses under high confining pressure, especially at temperatures above the zero pressure glass transition temperature. The present measurements on rubber glass at high pressure show that the deformation at high pressure is similar to the cold flow commonly observed in thermoplastics at atmospheric pressure but that the stress levels involved are relatively low when compared to the Young's modulus. (Author)

Descriptors :   (*HIGH PRESSURE, RUBBER), (*RUBBER, MECHANICAL PROPERTIES), SYNTHETIC RUBBER, TRANSITION TEMPERATURE, STRESSES, STRAIN(MECHANICS), YIELD POINT, MODULUS OF ELASTICITY, AUSTRALIA

Subject Categories : Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE