NMR INVESTIGATION OF PHENOLPHTHALEIN POLY ETHER ETHER KETONE .1. THE CHAIN STRUCTURE AND ASSIGNMENTS OF H-1, C-13 NMR LINES OF PEK-C

Amorphous samples of polyether ketone with cardo(PEK-C) have been stud ied in the solution state by C-13, H-1 high-resolution NMR, The H-1 an d C-13 1D NMR spectra were assigned using two dimensional chemical shi ft correlated spectroscopy, 2D homonuclear correlated(COSY) and hetero nuclear correlated (HETCOR) spectroscopy present important information . In this work, the structural units of PEK-C was determined by NMR. F or some peaks, these assignments are confirmed by two dimensional long -range heteronuclear correlation experiments, A little modification is made on the original C-13 peak assignments for the main chain, The sy mmetry and the isotacticity of the chain structure for PEK-C are obvio us on NMR data.