engleski

The study of glass transition in epoxy resin by thermally stimulated depolarization current. Compensation phenomenon

The pure and the cured epoxy resin was characterized by the integral and partial thermally stimulated depolarization current in the range of glass transition. The function of the activation energy vs. T obtained by use of the integral current curve I_i(T_i) by direct transition of points I_i into E_i showed only one linear course without peculiarities. The E(T) function obtained by use of series of the partial peaks showed several linear stages. The relaxation maps were drawn and the compensation points determined. The coordinates of compensation points for cured resin in comparison with the pure resin indicated a decrease in motion of the moving parts in resin during the curing. The relative numbers of the relaxing dipoles vs. activation energy were approximated.

activation energy distribution; compensation phenomenon; epoxy resin; termally stimulated current

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