With the introduction of the Simha-Somcynsky(SS)equation-of-state(EOS)into the Vrentas-Duda model,a modified diffusion coefficient model based on the EOS was developed for polymer-solvent systems.

• 将Simha-Somcynsky状态方程引入到Vrentas-Duda扩散系数模型,建立基于状态方程的溶剂在高分子中扩散系数模型。