2017 Volume 31 Issue 2 Pages 89-96
For the measurement of the Soret coefficient and the thermodiffusion coefficient in ternary systems, we have developed the working equations and the experimental setup based on the holographic grating technique which we call the Soret forced Rayleigh scattering (SFRS) method. Introducing another probing laser of the different wavelength enables to evaluate the mass transport of the two independent components in the ternary systems. As the wavelengths of the probing lasers, λ = 403 nm and λ = 639 nm have been selected. The experimental setup has been validated by the measurement of the benchmark systems composed of tetralin, isobutylbenzene, and dodecane. We applied the SFRS method to the measurement of the ternary polymer solutions of cellulose acetate butyrate (CAB)/styrene/2-butanone. The Soret coefficient and the thermodiffusion coefficient of the ternary polymer solutions have been shown for the first time.
