ISO 6721 Dynamic Testing of Plastic Materials

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ISO 6721-1 Dynamic Testing of Plastic Materials

ISO 6721-1 covers the dynamic testing of plastic to determine properties of plastic within the linear viscous elastic region. ISO 6721-1 in an introductory part to ISO 6721 can covers common issues between all the ISO 6721 standards.

ISO 6721-2 Torsion Plastics Composites

Specifies methods for linear dynamic mechanical properties of plastics, i.e. the storage and loss components of the torsional modulus, as a function of temperature. The ISO 6721-2 standard characterizes the the visco-elastic properties of thermoplastic and thermosetting resins and composite systems in the form of rectangular bars. The specimens may be directly cut from sheets, molded shapes or plates. The data generated using pendulum torsion techniques may be used to assess the elastic modulus with respect to different temperatures, frequencies and time. The test also specifies how to measure the loss moduli or Tan Delta to compare insulation properties of the plastics.

ISO 6721-4 Dynamic Tension Testing of Plastic Composites

The ISO 6721-4 standard characterizes the the visco-elastic properties of thermoplastic and thermosetting resins and composite systems in the form of rectangular specimen. The specimens may be directly cut from sheets, molded shapes or plates. The data generated using tension testing techniques may be used to assess the elastic modulus with respect to different temperatures, frequencies and time. The test also specifies how to measure the loss moduli or Tan Delta to compare insulation properties of the plastics. The ISO 6721, Part 4 standard is technically equivalent to ASTM D5026.

ISO 6721-5 Flexure Dynamic Testing of Plastic Composites

The ISO 6721-5 standard characterizes the the visco-elastic properties of thermoplastic and thermosetting resins and composite systems in the form of rectangular bars. The specimens may be directly cut from sheets, molded shapes or plates. The data generated using three-point bending techniques may be used to assess the elastic modulus with respect to different temperatures, frequencies and time. The test also specifies how to measure the loss moduli or Tan Delta to compare insulation properties of the plastics. The ISO 6721 Part 5 standard is technically equivalent to the ASTM D5023 standard.

ISO 6721-6 Plastic Shear Vibration Fatigue

The purpose of ISO 6721-6 is to determine the effects of dynamic shear vibration on plastic materials. ISO 6721-6 aims to use shear vibration loading on plastic specimen to determine the shear complex modulus G(Zeichen). Testing is typically done between 0.01 Hz and 100 Hz. ISO 6721-6 can be used to measure dynamic storage moduli in the range of 0.1 MPa to 50 MPa. Dynamic shear vibration testing in accordance to ISO 6721-6 is exceedingly useful for measuring loss factors greater than 0.1.

ISO 6721-7 Torsional Vibration of Plastics

ISO 6721-7 describes a torsional vibration method for determining the components of the shear complex modulus of solid polymers in the form of bars or rods at frequencies typically in the range 0.001 Hz to 100 Hz. Suitable for measuring dynamic storage moduli ranging from about 10 MPa to values of about 10 GPa. Particularly suited to the measurement of loss factors greater than 0.1.

ISO 6721-10 Plastic Shear Viscosity

ISO 6721 Part 10: Complex shear viscosity using a parallel-plate oscillatory rheometer. ISO 6721-10 covers the determination of plastic viscosity and other viscoelastic characteristics and the effect of frequency, strain amplitude, temperature and time. The test uses a machine that is capable of constant amplitude cyclic loading to apply mechanical oscillations to the thermoplastic polymer test specimen. Temperature controlled chambers are necessary to determine the rheological nature of the plastic specimen through a range of temperatures. ISO 6721-10 is valid for frequencies from 0.01 to 100 Hz.

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