Complex plane analysis of heat capacity of polymers in the glass transition region

摘要: A method is described which enables the direct measurement of relaxation times and relaxed nonrelaxed heat capacities as a function temperature. The apparatus designed to be used additional equipment Perkin-Elmer differential scanning calorimeter DSC-1B. specimen heated periodically with time instead proportionally. amount phase flow are measured. parameters an 'equivalent circuit' capacity model fitted measured complex Cp values obtained at various frequencies appropriate amplitudes Further applications 'oscillating thermal analysis' proposed.