ISO1628-5 Plastics — Determination of the Viscosity of Polymers in Dilute Solution Using Capillary Viscometers – Thermoplastic Polyester (TP) Homopolymers and Copolymers
3 PrincipleThe times of flow of a solvent and a solution of resin in the solvent at a concentration of 0,005 g/ml aremeasured at 25 °C by conventional methods. The viscosity number is calculated from thesemeasurements and from the known concentration of the solution. Specific gravity difference and kineticenergy corrections are small in this method…