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ASTM E 1640 Document Information:
Title
Standard Test Method for Assignment of the Glass Transition Temperature By Dynamic Mechanical Analysis
ASTM International
Publication Date:
Jun 1, 2004
Scope:
This test method covers the assignment of a glass transition
temperature (Tg) of materials using
dynamic mechanical analyzers.
This test method is applicable to thermoplastic polymers, thermoset
polymers, and partially
crystalline materials which are thermally stable in the glass
transition region.
The applicable range of temperatures for this test method is dependent
upon the instrumentation
used, but, in order to encompass all materials, the minimum
temperature should be about
−150°C.
This test method is intended for materials having an elastic modulus
in the range of 0.5 MPa to 100
GPa.
Electronic instrumentation or automated data analysis and data
reduction systems or treatments
equivalent to this test method may also be used.
NOTE 1 - The user bears the responsibility for determining the
precision, accuracy, and validity of
the techniques and measurements made using dynamic mechanical
analyzers in accordance with this
standard.
SI units are the standard.
This standard is similar to IEC 61006 except that standard uses the
peak temprature of the
mechanical loss peak as the glass transition temperature while this
standard uses the extrapolated
onset temperature of the loss modulus change.
This 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.
Keywords:
- dynamic mechanical analysis
- elastic modulus
- glass transition
- modulus
- storage modulus
- temperature
- thermal analysis
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