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NEPLATNÁ ASTM D7426-08(2013) 1.11.2013 náhľad

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ASTM D7426-08(2013)

Standard Test Method for Assignment of the DSC Procedure for Determining Tg of a Polymer or an Elastomeric Compound (Withdrawn 2022)

Automaticky preložený názov:

Štandardná skúšobná metóda pre priradenie DSC postup stanovenia Tg polyméru alebo elastomérne zlúčeninou

NORMA vydaná dňa 1.11.2013

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Prevedenie	Elektronické PDF - 70.40 € Tlačené - 70.40 €
Dostupnosť	SKLADOM
Cena	70.40 € bez DPH
70.40 €

Informácie o norme:

Označenie normy: ASTM D7426-08(2013)
Poznámka: NEPLATNÁ
Dátum vydania normy: 1.11.2013
Kód tovaru: NS-38422
Počet strán: 4
Približná hmotnosť: 12 g (0.03 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM

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Anotácia textu normy ASTM D7426-08(2013) :

Keywords:

differential scanning calorimetry (DSC), differential thermal analysis (DTA), glass transition, specific heat capacity, ICS Number Code 83.080.10 (Thermosetting materials)

Doplňujúce informácie

Significance and Use

5.1 Differential scanning calorimetry provides a rapid test method for determining changes in specific heat capacity in a homogeneous material or domain. The glass transition is manifested as a step change in specific heat capacity. For amorphous and semi-crystalline materials the determination of the glass transition temperature may lead to important information about their thermal history, processing conditions, stability of phases, and progress of chemical reactions.

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

1. Scope

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

1.2 This 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.

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

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

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

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

1.7 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.

2. Referenced Documents

ISO 11357–2	Differential Scanning Calorimetry (DSC)-Part 2 Determination of Glass Transition Temperature
E1142-23b	Standard Terminology Relating to Thermophysical Properties (Includes all amendments and changes 10/5/2023).
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E473-23b	Standard Terminology Relating to Thermal Analysis and Rheology (Includes all amendments and changes 10/5/2023).
E177-20	Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E967-18	Standard Test Method for Temperature Calibration of Differential Scanning Calorimeters and Differential Thermal Analyzers