TRIAD SEQUENCE ASSIGNMENT OF THE C-13-NMR SPECTRA OF COPOLYMERS OF ETHYLENE-OXIDE AND 1,2-BUTYLENE OXIDE

13C-NMR spectra of homopolymers and block and statistical copolymers of ethylene oxide and 1,2-butylene oxide have been studied in CDCl3 and C6D6 solution at 75.5 MHz with the aid of resolution-enhancement and subspectrum editing techniques. Resonances from triad sequences, endgroups, initiation sites and inverted monomer addition have been identified in C6D6 solution. The assignments have been tested for consistency using necessary statistical relationships, and have been shown to conform to a simple chemical shift additivity scheme. © 1990.