Scaling laws for pseudobinary microemulsions

The coexistence curves of three pseudobinary microemulsion systems, consist ing of surfactant, water and n-alkane, were determined by measurements of r efractive index. The critical exponent beta was deduced precisely from coex istence curves, which are consistent with the 3D-Ising exponent when the te mperatures approach to the critical points, The experimental results,also i ndicate that the critical amplitude scaling laws for chain-molecular soluti ons are valid for these microemulsion systems.