Self-diffusion studies on ω-methoxy polyethylene glycol macromonomer micelles by using cyclic voltammetric and Fourier transform pulsed gradient spin-echo nuclear magnetic resonance techniques

Abstract

The self-diffusion coefficient, D_m, interaction parameter, k_f, and hydrodynamic radius, R_h^m, of the acrylic ester of ω -methoxy polyethylene glycol macromonomer micelles were determined by a cyclic voltammetric technique using Co(sep)Cl₃ as the redox-active electrochemical probe. A self-diffusion coefficient of the above macromonomer was also determined by Fourier transform pulsed gradient spin-echo (FT-PGSE) NMR technique. It has been found that the D_m is useful in measuring the critical micelle concentration of the macromonomer.