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

BS ISO 6721-10:2015

Plastics. Determination of dynamic mechanical properties. Complex shear viscosity using a parallel-plate oscillatory rheometer

Status : Confirmed, Current   Published : October 2015

Format
PDF

Format
HARDCOPY



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
StatusConfirmed, Current
Publication Date31 October 2015
Confirm Date14 October 2016
Normative References(Required to achieve compliance to this standard)ISO 6721-1, ISO 5725-1, ISO 472
Informative References(Provided for Information)No other standards are informatively referenced
ReplacesBS ISO 6721-10:1999
International RelationshipsISO 6721-10:2015
Draft Superseded By14/30284280 DC
DescriptorsDynamic testing, Rheological properties, Polymers, Dynamic viscosity, Rigidity, Angles (geometry), Viscosity measurement, Mechanical properties of materials, Complex, Oscillators, Shear strain, Strain, Viscosity, Plastics and rubber technology, Shear stress, Frequencies, Mechanical testing, Plastics
ICS83.080.01
Title in FrenchPlastiques. Détermination des propriétés mécaniques dynamiques. Viscosité complexe en cisaillement à l’aide d’un rhéomètre à oscillations à plateaux parallèles
CommitteePRI/21
ISBN978 0 580 83208 6
PublisherBSI
FormatA4
DeliveryYes
Pages28
File Size1.09 MB
Price£182.00


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