A systematical research of the effect of molecular weight of epoxy pre-polymer

stoichio-metry and cure condition on the distributuin of relaxation time of dynamic loss tan o in Tg relaxation region of epoxy network has been reported in the present paper. Our results first proved that the Tg relaxation of epoxy network is characteristic of standard linear solid with a single relaxation time which is independent of the molecular weight

stoichiometry and cure condition. The present results can be interpreted by using inhomogeneous structure feature in the epoxy network.