ISO 1628-3:2010

Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 3 : polyethylenes and polypropylenes

ISO 1628-3:2010 defines particular conditions for determining the reduced viscosity (also known as viscosity number) and intrinsic viscosity of polyethylenes and polypropylenes at 135 °C in dilute solution.

The viscosity of polymer solutions may be affected by additives present in the sample. The value of a reduced viscosity determined by this method may therefore be unreliable if the sample contains fillers or other additives.

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