MORPHOLOGY OF POLYMER-SALT COMPLEX FILMS CROSSOVER FROM FRACTAL TO COMPACT AGGREGATION

In this paper we present a study of the variation of morphology of pol yethylene oxide (PEO) films complexed with ammonium perchlorate (NH4Cl O4) formed by evaporating a methanolic solution. Films with salt conce ntration x = 0 - 0.35 (x is the weight fraction of salt) were prepared for the morphology study. The wide variety of structures obtained wer e systematically studied by photographs and polarizing microscopy. Som e preliminary studies of x-ray diffraction, differential scanning calo rimetry and variable temperature polarizing microscopy have also been done to identify the various phases present in the films.