CREEP RELATION CONSIDERING THE EFFECTS OF HYDROSTATIC-PRESSURE AND TEMPERATURE FOR CELLULOSE NITRITE

The deformation behavior of polymers, unlike metals, is strongly influ enced by the hydrostatic pressure. In this paper, the creep relation o f polymers, considering the effect of hydrostatic pressure, is deduced by using the concept of tenser function theory, including temperature function of the exponential form. In addition, the validity of the de duced creep relation is discussed in relation to the creep tests, cons idering the effect of the hydrostatic pressure at the several experime ntal temperatures and using the cellulose nitrate plate as in previous papers.