Polymer Blends Based on Poly(Ethylene Oxide) as Matrices of Solid State Ionics

Abstract

The equilibrium sorption, inverse gas chromatography (dynamic sorption), optic microscopy, X-ray diffraction and visible light scattering methods were used to investigate the structure of poly(ethylene oxide) (PEO) blended with poly(vin/lacetate) and poly(siloxanes) as matrices of polymer solid electrolytes. It was shown that the melting point (Tm) and the degree of crystallinity in such PEO-blends were lower than in pure PEO. The Gibbs energy of mixing and the compatibility parameter (X 12 ) were obtained for PEO-blends. In the vicinity of Tm all the systems were thermodynamically compatible, however at the ambient temperature they were microgeterogenous and compatible only in the narrow range of PEO-modificator contents. This must be taken into consideration while creating solid polymer electrolytes based on polymer blend matrices.