One-point determination of intrinsic viscosity for polycarbonate,poly(phenylene oxide), and polyetherimide

Intrinsic viscosity determination for polymers can be simplified and considerable time and effort saved via a single measurement of relative viscosity at a known concentration. Several workers have proposed one-point intrinsic viscosity methods. Of the methods in the literature, two one-point methods were found to be as accurate as the multiple-point graphical extrapolation procedure. These two methods, one due to Solomon and Ciuta and a nomographic technique due to Khan and Bhargava, were successfully applied for the intrinsic viscosity determination of three polymers: polycarbonate, poly(phenylene oxide) and polyetherimide.