Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 3: Polyethylenes and polypropylenes ISO 1628-3:2001

This standard provides a method for determining the viscosity of polymers in dilute solutions using a capillary viscometer. It specifically outlines the procedures applicable to polyethylene and polypropylene. The method involves measuring the flow time of the solution through a capillary tube and calculating the viscosity based on the measured values. The standard defines the equipment, test conditions, and calculation methods required to ensure consistent and reliable results. It also includes guidelines for sample preparation and handling to minimize errors during the testing process. The document is structured to facilitate the application of the method in various laboratory settings.