On-Line HPLC-NMR of Polymers

摘要

We have used on-line HPLC-NMR to analyze complex polymer systems. This combined technique takes advantage of the separation power of HPLC and the structure elucidation ability of NMR. It is also relatively easy to do and provide very valuable information. The utility of the HPLC-NMR has been shown for three polymeric systems: a) determination of chemical structure and degree of polymerization of technical-grade poly(ethylene oxide); b) analysis of end-group structure, degree of polymerization, and tacticity of oligostyrene; c) determination of chemical composition and chemical heterogeneity at high conversions of random poly(styrene-co-ethyl acrylate).