Standard Test Method for Assignment of the Glass Transition Temperature By Dynamic Mechanical Analysis

Importancia y uso:

5.1 This test method can be used to locate the glass transition region and assign a glass transition temperature of amorphous and semi-crystalline materials.

5.2 Dynamic mechanical analyzers monitor changes in the viscoelastic properties of a material as a function of temperature and frequency, providing a means to quantify these changes. In ideal cases, the temperature of the onset of the decrease in storage modulus marks the glass transition.

5.3 The glass transition takes place over a temperature range. This method assigns a single temperature (T_g) to represent that temperature range as measured by dynamic mechanical analysis. T_g may be determined by a variety of techniques and may vary according to that technique.

5.4 A glass transition temperature (T_g) is useful in characterizing many important physical attributes of thermoplastic, thermosets, and semi-crystalline materials including their thermal history, processing conditions, physical stability, progress of chemical reactions, degree of cure, and both mechanical and electrical behavior.

5.5 This test method is useful for quality control, specification acceptance, and research.

Subcomité:

E37.10

Referida por:

E3433-24, D7028-07R24, E1867-22, E2602-24, D3794-22, F0942-18R23E01, E3301-22, F0790-23, F3131-14R23

Volúmen:

14.01

Número ICS:

81.040.10 (Raw materials and raw glass)

Palabras clave:

dynamic mechanical analysis; elastic modulus; glass transition; modulus; storage modulus; temperature; thermal analysis;