ONION-LIKE STRUCTURE OF POLY [BIS(TRIFLUOROETHOXY) PHOSPHAZENE]-PBFP SPHERULITE

Abstract

Fracture surface morphology of spherulitic PBFP films has been studied by scanning electron microscopy. Onion-like cospherical aggregates are obtained in THF solution cast films. This morphology changes to that of irregular shaped crystalline platelets after melting and crystallization. The striations originally associated with chain axis direction of PBFP crystals have been observed on the fracture surface by employing ion ethching technique. From this it can be concluded that [c] axis direction is perpendicular to the spherulite radius.