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ISO 6721-10:2025

Plastics - Determination of dynamic mechanical properties - Part 10: Complex shear viscosity using a parallel-plate and a cone-and-plate oscillatory rheometer
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ISO 6721-10:2025

Plastics - Determination of dynamic mechanical properties - Part 10: Complex shear viscosity using a parallel-plate and a cone-and-plate oscillatory rheometer

PUBLISH DATE 2025
ISO 6721-10:2025

This document specifies the general principles of a method for determining the dynamic rheological properties of polymer melts at angular frequencies typically in the range of 0,01 rad s-1 to 100 rad s-1 by means of an oscillatory rheometer with a parallel-plate or a cone-and-plate geometry. Angular frequencies outside this range can also be used.

The method is applicable for determining values of the following dynamic rheological properties: complex shear viscosity  *, dynamic shear viscosity  ', the out-of-phase component of the complex shear viscosity ”, complex shear modulus G*, shear loss modulus G”, shear storage modulus G', phase angle , and loss factor tan . It is suitable for measuring complex shear viscosity values typically up to ~10 MPa s.

NOTE            The shear loss modulus G´´ is sometimes also called viscous shear modulus and the shear storage modulus G´ is sometimes also called elastic shear modulus.

SDO ISO: International Organization for Standardization
Document Number ISO 6721
Publication Date Jan. 1, 2025
Language en - English
Page Count 26
Revision Level
Supercedes
Committee ISO/TC 61/SC 5
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