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  • BSI
    BS ISO 6721-10:2015 Plastics. Determination of dynamic mechanical properties - Complex shear viscosity using a parallel-plate oscillatory rheometer
    Edition: 2015
    $411.69
    / user per year

Description of BS ISO 6721-10:2015 2015

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.



Standard NumberBS ISO 6721-10:2015
TitlePlastics. Determination of dynamic mechanical properties - Complex shear viscosity using a parallel-plate oscillatory rheometer
StatusUnder Review
Publication Date2015-10-31
ReplacesBS ISO 6721-10:1999
Identical National Standard OfISO 6721-10:2015
DescriptorsPlastics, Mechanical testing, Frequencies, Shear stress, Plastics and rubber technology, Viscosity, Strain, Shear strain, Oscillators, Complex, Mechanical properties of materials, Viscosity measurement, Angles (geometry), Rigidity, Dynamic viscosity, Polymers, Rheological properties, Dynamic testing
ICS83.080.01 Plastics in general
CommitteePRI/21
ISBN978 0 580 83208 6
PublisherBSI
Pages28

The following editions for this book are also available...

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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