DEGRADATION KINETICS OF RESOL-MODIFIED EPOXY .1.

Blends of resole with epoxy resin (General Purpose) having different w eight ratios (0/100, 25/75, 50/50, 75/25, and 100/0) based on physical mixing have been prepared. These blends were cured by adding polyamid e in a 60:40 ratio based on blend resins and polyamide. The degradatio n kinetics of these resins was studied by dynamic thermogravimetric an alysis in nitrogen atmosphere at a heating rate of 15 degrees C/min by using the Coats-Redfern equation. It is concluded that the degradatio n of each sample follows first-order (n = 1) degradation kinetics. Thi s is obtained on the basis of best fit analysis, and all the parameter s are confirmed by regression analysis. From the reaction order value, activation energy (E) and preexponential factor (Z) were calculated b y the slope and intercept of the plot between X and Y, respectively.