BS EN ISO 1628-2 Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 2: Poly(vinyl chloride) resins

This standard establishes a specific method for determining the viscosity of dilute polymer solutions using capillary viscometers, with a particular focus on polyvinyl chloride resin. It forms the second part of a broader series dedicated to the physical properties of plastics, providing detailed procedures to ensure consistency and accuracy in laboratory measurements. The methodology outlines the necessary equipment, experimental conditions, and calculation formulas required to assess the flow behavior of the polymer within a controlled environment. By adhering to these protocols, testing laboratories can generate reliable data regarding the intrinsic viscosity and molecular weight characteristics of PVC materials. The approach addresses various factors influencing measurement precision, including temperature control and capillary dimensions, to facilitate comparable results across different facilities. This technical specification serves as a reference for quality assurance processes within the polymer industry, enabling manufacturers and researchers to evaluate material properties systematically without subjective interpretation.