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ASTM E1981-98(2012)e1

Historical Reaffirmation

Standard Guide for Assessing Thermal Stability of Materials by Methods of Accelerating Rate Calorimetry

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1.1 This guide covers suggested procedures for the operation of a calorimetric device designed to obtain temperature and pressure data as a function of time for systems undergoing a physicochemical change under nearly adiabatic conditions.

1.2 This guide outlines the calculation of thermodynamic parameters from the time, temperature, and pressure data recorded by a calorimetric device.

1.3 The assessment outlined in this guide may be used over a pressure range from full vacuum to the rated pressure of the reaction container and pressure transducer. The temperature range of the calorimeter typically varies from ambient to 500°C, but also may be user specified (see 6.6).

1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.5 This statement 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 practices and to determine the applicability of regulatory limitations prior to use. Specific safety precautions are outlined in Section 7.


5.1 The data from this guide seldom, if ever, directly simulate thermal and pressure events in the processing, storage, and shipping of chemicals. However, the data obtained from this guide may be used, with suitable precautions, to predict the thermal and pressure hazards associated with processing, storage, and shipping of a chemical or mixture of chemicals after appropriate scaling of the data. This has been addressed in the literature (1-4) but is beyond the scope of this guide.

5.2 This guide is suitable, under the proper conditions, for the investigation of the effects of catalyst, inhibitors, initiators, reaction atmospheres, materials of construction, or, if available, agitation (see 6.1.2).

5.3 Interpretation of the time-temperature or time-pressure data may be possible for relatively simple systems through the use of suitable temperature-dependent kinetic theories such as the Arrhenius and Absolute Reaction Rate theories (5-6) .

SDO ASTM: ASTM International
Document Number E1981
Publication Date Dec. 1, 2012
Language en - English
Page Count 8
Revision Level 98(2012)e1
Supercedes
Committee E27.02
Publish Date Document Id Type View
June 1, 2022 E1981-22 Revision
Dec. 1, 2012 E1981-98R12E02 Revision
Oct. 10, 1998 E1981-98 Revision
April 1, 2020 E1981-98R20 Reaffirmation
Dec. 1, 2012 E1981-98R12E01 Reaffirmation
April 1, 2004 E1981-98R04 Reaffirmation