Plast - Bestämning av dynamiska mekaniska egenskaper - Del 12: Kompressionsvibration - Icke-resonansmetod (ISO 6721-12:2009, IDT)
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SS-ISO 6721-12:2009
Plast - Bestämning av dynamiska mekaniska egenskaper - Del 12: Kompressionsvibration - Icke-resonansmetod (ISO 6721-12:2009, IDT)
Prenumerera på standarder med tjänst SIS Abonnemang. Genom att prenumerera får du effektiv åtkomst till gällande standarder och säkerställer att ditt företag alltid har tillgång till senaste utgåvan.
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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.
Plast - Bestämning av dynamiska mekaniska egenskaper - Del 12: Kompressionsvibration - Icke-resonansmetod (ISO 6721-12:2009, IDT)
Prenumerera på standarder med tjänst SIS Abonnemang. Genom att prenumerera får du effektiv åtkomst till gällande standarder och säkerställer att ditt företag alltid har tillgång till senaste utgåvan.
Läs mer om SIS Abonnemang