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.
Status: PublishedPublication date: 2010-05
Edition: 3Number of pages: 7
Technical Committee: ISO/TC 61/SC 9 Thermoplastic materials
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