The dynamics of phase separation in a binary polymer blend of poly(vinyl acetate) with poly(methyl methacrylate) was investigated by using a time-resolved light-scattering technique. In the later stages of spinodal decomposition, a simple dynamic scaling law was found for the scattering function S(q, t)(S(q, t) ~ I(q, t)):S(q, t)q~3S(q/qm). The scaling function determined experimentally was in good agreement with that predicted by Furukawa, S(X)~ X2/(3 + X 8) for critical concentration, and approximately in agreement with that predicted by Furukawa, g(X)~ X2/(3 + X 6) for non-critical mixtures. The light-scattering invariant shows that the later stages of the spinodal decomposition were undergoing domain ripening.
Посилання на статтю:
Dynamic scaling of the structure function for spinodal decomposition in critical and non-critical mixtures of poly(vinyl acetate)-poly (methyl methacrylate) / Mo Song, Yuhui Huang and Guangmin Cong // Polymer. – 1992. – Vol 33. – P. 1293-1298.