Читать книгу Poly(lactic acid) - Группа авторов - Страница 58

Vapor pressure measurements of anhydrous lactic acid could potentially be affected by oligomerization which produces water. Many vapor pressure measurements are provided by investigators measuring vapor pressure during use of lactic acid in chemical synthesis. Oligomerization of aqueous lactic acid significantly influences optical rotation, bubble temperature, and viscosity. Property measurements of aqueous solutions require careful validation of oligomer equilibration. The titratable acidities of equilibrated aqueous solutions are well represented by the Flory‐Schulz distribution which is a measure of the number of free acid groups in the equilibrated mixture.