SEM Studies on ABPBI/PBT Cast Films

Abstract : Scanning electron microscopy studies on poly-p-phenylene benzobisthiazole (PBT) a rigid rod polymer - and poly - 2,5 (6) benzimidazole, - a flexible coil polymer, - cast films indicate aggregates, or domains, rich in PBT polymer dominate the morphology. In blends containing 10-30% PBT, the shape of the aggregates or domains is ellipsoidal whereas in the 60% blend the morphology is distinctly lamellar or ribbon-like.