ISO 6721-10:2015
Plastics - Determination of dynamic mechanical properties - Part 10: Complex shear viscosity using a parallel-plate oscillatory rheometer

Standard No.

ISO 6721-10:2015

Release Date

2015

Published By

International Organization for Standardization (ISO)

Latest

ISO 6721-10:2015

Scope

This part of ISO 6721 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 geometry. Angular frequencies outside this range can also be used (see Note 1). The method is used to determine values of the following dynamic rheological properties: complex shear viscosity η*, dynamic shear viscosity η’, the out-of-phase component of the complex shear viscosity η”, complex shear modulus G*, shear loss modulus G”, and shear storage modulus G’. It is suitable for measuring complex shear viscosity values typically up to ~10 MPa·s (see Note 2). NOTE 1 The angular-frequency measurement range is limited by the specification of the measuring instrument and also by the response of the specimen. When testing using angular frequencies lower than 0,1 rad·s–1, the test time can increase significantly as the time taken to obtain a single measurement is proportional to the reciprocal of the angular frequency. Consequently, when testing at low angular frequencies, degradation or polymerization of the specimen is more likely to occur and have an effect on the results. At high angular frequencies, the specimen can distort or fracture at the edge, consequently invalidating the test results. NOTE 2 The range of complex shear viscosity values that can be measured is dependent on the specimen dimensions and also the specification of the measuring instrument. For a specimen of given dimensions, the upper limit of the range is limited by the machine’s torque capacity, angular-displacement resolution, and compliance. However, correction can be made for compliance effects.

ISO 6721-10:2015 Referenced Document

• ISO 472:2013 Plastics - Vocabulary
• ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results - Part 1: General principles and definitions
• ISO 6721-1:2011 Plastics - Determination of dynamic mechanical properties - Part 1: General principles

ISO 6721-10:2015 history

• 2015 ISO 6721-10:2015 Plastics - Determination of dynamic mechanical properties - Part 10: Complex shear viscosity using a parallel-plate oscillatory rheometer
• 1999 ISO 6721-10:1999 Plastics - Determination of dynamic mechanical properties - Part 10: Complex shear viscosity using a parallel-plate oscillatory rheometer
• 1997 ISO 6721-10:1997 Plastics - Determination of dynamic mechanical properties - Part 10: Complex shear viscosity using a parallel-plate oscillatory rheometer