Aggregation of ionic endgroups in polymers
Polimery 1996, No 7-8, 398
Synthesis has been described of halato-telechelic polymers: polyethers (polymers of ethylene oxide) terminated on either end with the phosphonium ion groups. The polymers were investigated by NMR and mass spectroscopy. Analysis of 31P-NMR spectra showed the phosphorus chemical shift to depend on the degree of aggregation of the ionic endgroups in the polymer. For diluted solutions of the polymers terminated on one or both ends with the phosphonium ion groups, the chemical shift vs. concentration relationship enables the contribution of intramolecular aggregation resulting in cyclic structures to be estimated. Attempts at a quantitative interpretation of the results have been made. Intramolecularly aggregated polymers of ethylene oxide (PEOX) terminated on either end with the phosphonium ion groups are efficient catalysts of phase transfer reactions (PTC).
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