ASTM D 7426 : 2024

1.1This test method covers the assignment of the glass transition temperatures (T_g) of materials using differential scanning calorimetry.

1.2This test method is applicable to amorphous materials, including thermosets or semicrystaline materials containing amorphous regions, that are stable and do not undergo decomposition or sublimation in the glass transition region.

1.3The normal operating temperature range is from –120 to 500°C. The temperature range may be extended, depending upon the instrumentation used.

1.4Computer or electronic-based instruments, techniques, or data treatment equivalent to this test method may also be used.

1.5ISO 11357–2 is equivalent to this test method.

1.6The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.

1.7This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

1.8This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.