PROCEDURE MEASURING ACTIVATION ENERGY OF PROCESSES OF MOLECULAR MOBILITY IN POLYMER Russian patent published in 2003 - IPC

FIELD: measurement technology, production of high-molecular compounds, prediction of change of physical properties of polymers under various operating conditions. SUBSTANCE: examined specimen of polymer system is placed into primary measurement converter of capacitive type, tension of thermal electric fluctuations u (t) is measured and recorded across its terminals in the course of time interval Δ at temperature T. Obtained data are used to compute activation energy of corresponding process of relaxation W_i = 2,303RTlg(τ_corν_0i), where R is universal gas constant; t is time; τ_cor is correlation time of process of electric fluctuations of polymer system found by correlation function R(τ); ν_0i is inherent frequency of oscillations of i-th relaxer determined by dependence of spectral density of tension of electric fluctuations SUi

(ν) on frequency ν. EFFECT: increased informativity of nondestructive and energetically nondisturbing determination of activation energy of processes of relaxation in polymer systems. 3 dwg, 2 tbl