Laboratoire de Chimie Macromoléculaire, Université Pierre et Marie Curie, 4, place Jussieu, Tour 44, 75230 Paris Cedex 05, France;Department of Chemical Engineering, North Carolina State University, Raleigh, N.C. 27650, USA
Abstract:
A 13C n.m.r. study of the microstructure of ethyl vinyl ether (EVE) and isopropyl vinyl ether (IPVE) polymers prepared under various experimental conditions and using chemical or γ-ray initiation has been made. Long stereo-sequence assignments were conducted for poly EVE allowing determination of the configurational statistic of propagation in the radiation-induced polymerization of EVE in low polar solvents. Stereo-sequence intensities are found in good agreement with the Markovian model. The results are considered as further support for the occurence of a specific interaction between the growing active centres and the polymer chains. In the case of IPVE polymers much more important overlappings of the resonance patterns are observed thus preventing any similar detailed study.