Tensile thermal inversion

It is noted that the specific phase morphology of the injected molded tensile specimens used in the present study may differ from the compression molded film morphology. In the case of extruded samples of polymer blends displaying macrophase separation. Van Oene (25) indicates that the dispersed phase may appear as either ribbons (stratification) or droplets independent of shear strain rate but dependent of the post-extrusion thermal history. A study of the effect of morphology and phase inversion on the mechanical properties of the incompatible PPO blends is presently in progress. 

To and Fq are the references at the ambient conditions. Ay is the energy perturbation and 8y the strain caused by the applied stimuli. The summation and the production are preceded over all the J stimuli of (z, s, P, T). The a(f) is the temperature-dependent thermal expansion coefficient (TEC), p = —dv/ vdp) is the compressibility (p <0 compressive stress) or extensibility (p > 0 tensile stress) that is proportional to the inverse of elastic bulk modulus. The k(s) is the effective force constant. rj(t) is the T-dependent specific heat of the representative bond, which approximates Debye approximation, C iTIdi)), for a z-coordinated atom. Generally, the thermal measurement is conducted under constant pressure and the i/(f) is related to the Cp. However, there is only a few percent difference between the Cp and Cy [1]. 

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