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prEN ISO 1628-3

Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 3: Polyethylenes and polypropylenes (ISO/DIS 1628-3:2026)

Publication date:   Jun 18, 2026

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40.60   Close of voting   Sep 8, 2026

CEN

CEN/TC 249 Plastics

European Norm

83.080.20   Thermoplastic materials

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Scope

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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prEN ISO 1628-3
40.60 Close of voting
Sep 8, 2026