Abstract
Networks of cross-linked poly(ethylene oxide) and a polyether-substituted polysiloxane were synthesized containing (i) variations of PEO content, (ii) PEO systematically varied from low to high molecular weight, and (iii) pentafunctional glycidoxy derivitized siloxane oligomers which acted as cross-linking units for both polymer components. Surface chemical analysis by ESCA demonstrated improved PEO surface coverage with increasing PEO content and molecular weight. This observation and the relative enhancement of surface silicon content with respect to the calculated bulk value were interpreted in terms of free energy minimization, chain overlap, and phase mixing.
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