Определение гидроксильного числа полиэтиленгликолей методом дифференциальной сканирующей калориметрии

A method for determination of hydroxyl number (HN) of bifunctional polyethers (polyethylene glycols) in the range from 28 to 380 mg KOH/g by melting point T melt using differential-scanning calorimetry (DSC) is developed. Provided that the functionality of the polyester is constant (f = 2), T melt exhibits a linear dependence on the hydroxyl number of polyester. The method was tested in the analysis of industrial PEG samples.