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.
PUBLISHED
SRPS EN ISO 1628-3:2011
PROJECT
nkSRPS EN ISO 1628-3:2024
30.99
CD approved for registration as DIS
Apr 27, 2026