Abstract
Temperature Dependence of Complex Young's moduli of different practical polymer materials has been measured at the frequency of tens of cps and in the temperature range of -30 +l00°c. `Mean temperature coeffcients' of complex Young's moduli in the neighborhood of room temperature are tabulated. Temperature dependence of resonance frequency and specific response at low frequencies of the plastic diaphragms of stiffness control is discussed as an example. Interrelations between loss tangent and storage modulus or its temperature coefficients are studied in detail. It is shown that apparent activation energy of relaxation time of thermorheologically simple materials can be obtained approximately from the measurement of the ratio of loss tangent to temperature coefficients of storage modulus.
