Poly(N-vinyl pyrrolidone) was blended with an epoxy resin to give a miscible blend. The thermal stability of DGEBA/PVP blends was studied by dynamic thermogravimetry. The kinetic parameters of the degradation were calculated. The results indicated that the presence of one component influences the stability of the other. In general, PVP has a stabilizing effect on DGEBA, but PVP is destabilized by DGEBA. The chemical interactions between PVP and DGEBA on the one hand, and the viscosity of the medium, on the other hand, seem to be the factors governing the degradation behavior of the blend.