Standard Test Method for Plastics: Dynamic Mechanical Properties: In Torsion

Importancia y uso:

5.1 This test method provides a simple means of characterizing the thermomechanical behavior of plastics material. The data obtained may be used for quality control, research and development, and establishment of optimum processing conditions.

5.2 Dynamic mechanical testing provides a sensitive method for determining thermomechanical characteristics by measuring the elastic and loss moduli as a function of frequency, temperature, or time. Plots of moduli and tan delta of a material versus temperature provide graphical representations indicative of physical and mechanical properties, effectiveness of cure (thermosetting resin system), and damping behavior under specified conditions.

5.3 This test method can be used to assess

5.3.1 The modulus as a function of temperature,

5.3.2 The modulus as a function of frequency,

5.3.3 The effects of processing treatment, including orientation,

5.3.4 Relative resin behavioral properties, including cure and damping,

5.3.5 The effects of substrate types and orientation (fabrication) on elastic modulus, and

5.3.6 The effects of formulation additives that might affect processability or performance.

5.4 Before proceeding with this test method, reference should be made to the specification of the material being tested. Any test specimen preparation, conditioning, dimensions, or testing parameters, or combination thereof, covered in the relevant ASTM materials specification shall take precedence over those mentioned in this test method. If there are no relevant ASTM materials specifications, then the default conditions apply.

Subcomité:

D20.10

Referida por:

D6382_D6382M-99R22, D5592-94R18, D8349-21, D4000-23, D4101-24, D5418-23, D4065-20

Volúmen:

08.03

Número ICS:

83.080.01 (Plastics in general)

Palabras clave:

dynamic mechanical rheological properties; elastic; loss; storage; tan delta; torsional shear modulus; viscoelastic behavior; viscous;