SS-ISO-6721-12 Plastics - Determination of dynamic mechanical properties - Part 12: Compressive vibration - Non-resonance method (ISO 6721-12:2009, IDT)

SS-ISO-6721-12 - 2009 EDITION - CURRENT

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This part of ISO 6721 describes a compressive vibration, non-resonance method for determining the components of the compressive complex modulus E* of polymers at frequencies typically in the range 0,01 Hz to 100 Hz. The method is suitable for measuring dynamic storage moduli of semi-rigid polymers in the range 1 MPa to 1 GPa (see Notes 1 and 2). NOTE 1 The method is applicable to the following semi-rigid polymers: - low-density polyethylene, ultra-high-molecular-weight polyethylene, polybutylene, and ethylene/propylene/diene copolymer; - polytetrafluoroethylene, plasticized poly(vinyl chloride), and ethylene/vinyl acetate copolymer; - thermoplastic elastomers and polyurethane. NOTE 2 The measurement of dynamic properties of materials with different ranges of moduli can be made using alternative modes of deformation (i.e. a shear mode for 0,1 MPa < E' < 50 MPa, a tensile mode for 0,01 GPa < E' < 5 GPa, a torsional mode for 10 MPa < E' < 10 GPa, and flexural modes for E' > 5 GPa. This method is particularly suited to the measurements of dynamic moduli and loss factors of semi-rigid plastics in the shape of a right-angled prism, cylinder or tube and can be conveniently used to study the variation of dynamic properties with temperature and frequency through most of the glass-rubber relaxation region (see ISO 6721-1:2001, Subclause 9.4). The availability of data determined over wide ranges of both frequency and temperature enables master plots to be derived, using frequency/temperature shift procedures, which present dynamic properties over an extended frequency range at different temperatures.

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83.080.01 (Plastics in general)

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Designation Name

SS-ISO 6721-12:2009

Revision Level




Publication Date

Dec. 7, 2009



Page Count


International Equivalent

ISO 6721-12:2009(IDT)