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第十講 高分子溶液 1.高分子溶液与胶体的区別 溶液由溶质及溶剂组成,成为单相体系如蔗糖水溶液。胶体为两相体系如金溶胶等。这两种体系有原則上的差别,溶液在外界条件不改变时处于热力学平衡从态,可用热力学函数描述,如蒸气压、渗透压等。而胶体中有一相分散得很细不稳定,因微粒越小表面能越大,故胶体有減小相界面的趋向,卽胶粒的凝聚終
Lecture 10 polymer solution 1. The difference between polymer solution and colloidal solution Solute and solvent composition, as a single-phase system such as sucrose solution. Colloids are two-phase systems such as gold sols and the like. The two systems have a principle difference, the solution in the external conditions do not change in a thermodynamic equilibrium state, the thermodynamic function can be described, such as vapor pressure, osmotic pressure. The colloidal phase dispersion is very fine instability, because the smaller the particle surface energy, so colloidal phase interface to reduce the tendency of the gel end of the cohesion