LAYER ORDERING DURING POLYIMDE CAST FILM FORMING

Abstract

The concept of molecular composites was re-evaluated through the mechanical and morphological studies on the cast film forming from the rod/coil-typed block co-polyimide. The TEM observation has clarified that film modulus is dominated by the layer ordering of rod segments which are induced by the in-depth schrinkage through the cast film forming. These in-plane self-organizations should get much disturbed with the fabricational shift of from fibers or films to three-dimensional structural materials. Above result means that the request on how to keep up the in-plane alignments of the reinforcing units must be on further immediacy for the development of molecular composites-typed structural materials.