Abstract:
Specific features of self-diffusion and gelation in benzyl alcohol solutions of cellulose triacetate were studied by pulsed magnetic field gradient NMR. The self-diffusion coefficient of the polymer exhibits an anomalous temperature dependence during gelation. The existence of sol fraction in the gel phase has been proved experimentally and its temperature and concentration dependences have been established. A relationship has been proposed for the kinetics of gelation in solutions. © 1989.