On the Rigidity of Polynorbornenes with Dipolar Pendant Groups

摘要

A range of polynorbornenes (PNBs) with fused dipolar pendant groups at C-5,6 positions was synthesized by ring-opening metathesis polymerization catalyzed by a ruthenium carbene complex (Grubbs I).Photo-physical studies,EFISH measurements,and atomic force microscopy images have been used to investigate the structures and morphology of these polymers.These results suggest that the polymers may adopt rigid rod-like structures.The presence of the double bonds in PNBs appeared to be indispensable for the rigidity of the polymers.Interaction between unsaturated pendant groups may result in coherent alignment leading to a rod-like structure.