Kinetics of coil overlap in ionomer blends by hydrogen NMR in dimethyl sulfoxide(d6).

摘要

;In order to propose a complete model for the coil overlap phenomenon, parameters that can influence the kinetics of the process were studied. The parameters included the water content of the solution, the ion content of copolymers, the temperature, the MW of PS-SSA and the total polymer concentration.;It was found that the water content had no influence on the shielding process. The study of all the other parameters showed that the overlap was occurring through a complex mechanism. It was determined that the true order (n;The process of coil overlap was monitored as a function of time by the acquisition of a proton spectra, which showed the gradual disappearance of the original methoxy signal and the appearance of a new signal originating from the shielded methoxy protons. The contributions of the two species were separated using a deconvolution program.