FLORY-HUGGINS-INTERACTION PARAMETER OF POLY(ETHYLENEOXIDE) POLY(EPICHLOROHYDRIN) AND YLENEOXIDE)/POLY(EPICHLOROHYDRIN-CO-ETHYLENEOXIDE) BLENDS/

Blends of poly(ethylene) oxide with poly(epichlorohydrin) and poly(epi chlorohydrin-co-ethylene oxide) have been prepared by the freeze-dryin g method from benzene solutions of the polymer mixture at different co mpositions. The miscibility of the mixtures was studied by DSC. A sing le glass transition temperature is observed for all the blends studied . Measurement of the melting temperature (T-m) depression for the blen ds allowed determination of the Flory-Huggins interaction parameter (c hi(12)) of the two polymers in the melt using the Nishi-Wang equation. The Hoffman-Weeks extrapolation was applied to obtain equilibrium T-m data. The values of the chi(12) Obtained from T-m depression data wer e negative for all blends. This suggests the miscibility of the compon ents of the blends. (C) 1998 Published by Elsevier Science Ltd. All ri ghts reserved.