ASTM E1142-04

Standard Terminology Relating to Thermophysical Properties

SCOPE
1.1 This is a compilation of terms and corresponding definitions commonly used in the study of thermophysical properties. Terms that are generally understood or defined adequately in other readily available sources are either not included or their sources identified.
1.2 A definition is a single sentence with additional information included in a Discussion . It is reviewed every five years, and the year of the last review or revision is appended.
1.3 Definitions identical to those published by another standards organization or ASTM Committee are identified with the abbreviation of the name of the organization or the identifying document and ASTM Committee; for example, ICTA is the International Confederation for Thermal Analysis.
1.4 Definitions of terms specific to a particular field (such as dynamic mechanical measurements ) are identified with an italicized introductory phrase.

General Information

• Status: Historical
• Publication Date: 30-Nov-2004
• ICS: 01.040.17 - Metrology and measurement. Physical phenomena (Vocabularies)
• ICS: 17.200.10 - Heat. Calorimetry
• Technical Committee: E37 - Thermal Measurements
• Drafting Committee: E37.03 - Nomenclature and Definitions

Relations

• Replaces: ASTM E1142-97(2003) - Standard Terminology Relating to Thermophysical Properties
• Effective Date: 01-Dec-2004
• Replaced By: ASTM E1142-05 - Standard Terminology Relating to Thermophysical Properties
• Effective Date: 01-Nov-2005
• Referred By: ASTM E1860-23 - Standard Test Method for Elapsed Time Calibration of Thermal Analyzers
• Effective Date: 01-Dec-2004
• Referred By: ASTM E3142-18a(2023) - Standard Test Method for Thermal Lag of Thermal Analysis Apparatus
• Effective Date: 01-Dec-2004
• Referred By: ASTM E1582-21 - Standard Test Method for Temperature Calibration of Thermogravimetric Analyzers
• Effective Date: 01-Dec-2004
• Referred By: ASTM E2040-19 - Standard Test Method for Mass Scale Calibration of Thermogravimetric Analyzers
• Effective Date: 01-Dec-2004
• Referred By: ASTM E1867-22 - Standard Test Methods for Temperature Calibration of Dynamic Mechanical Analyzers
• Effective Date: 01-Dec-2004
• Referred By: ASTM E2890-21 - Standard Test Method for Determination of Kinetic Parameters and Reaction Order for Thermally Unstable Materials by Differential Scanning Calorimetry Using the Kissinger and Farjas Methods
• Effective Date: 01-Dec-2004
• Referred By: ASTM F2313-18 - Standard Specification for Poly(glycolide) and Poly(glycolide-co-lactide) Resins for Surgical Implants with Mole Fractions Greater Than or Equal to 70 % Glycolide
• Effective Date: 01-Dec-2004
• Referred By: ASTM E2716-23 - Standard Test Method for Determining Specific Heat Capacity by Modulated Temperature Differential Scanning Calorimetry
• Effective Date: 01-Dec-2004
• Referred By: ASTM E793-06(2018) - Standard Test Method for Enthalpies of Fusion and Crystallization by Differential Scanning Calorimetry
• Effective Date: 01-Dec-2004
• Referred By: ASTM E2509-21 - Standard Test Method for Temperature Calibration of Rheometers in Isothermal Mode
• Effective Date: 01-Dec-2004
• Referred By: ASTM E1641-23 - Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method
• Effective Date: 01-Dec-2004
• Referred By: ASTM E2602-22 - Standard Test Methods for Assignment of the Glass Transition Temperature by Modulated Temperature Differential Scanning Calorimetry
• Effective Date: 01-Dec-2004
• Referred By: ASTM D6382/D6382M-99(2022) - Standard Practice for Dynamic Mechanical Analysis and Thermogravimetry of Roofing and Waterproofing Membrane Material
• Effective Date: 01-Dec-2004

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:E1142–04
Standard Terminology
1
Relating to Thermophysical Properties
This standard is issued under the fixed designation E1142; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope decreasing temperature or increasing frequency, (D4092,
D-20), (1988).
1.1 This is a compilation of terms and corresponding
angular frequency, v—the number of radians per second
definitions commonly used in the study of thermophysical
traversedbyarotatingvectorthatrepresentsanyperiodically
properties. Terms that are generally understood or defined
varying quantity.
adequately in other readily available sources are either not
included or their sources identified.
DISCUSSION—Angular frequency, v, is equal to two p times the
1.2 A definition is a single sentence with additional infor- frequency, f.
mation included in a Discussion. It is reviewed every five
anti-thixotropy—an increase of the apparent viscosity under
years, and the year of the last review or revision is appended.
constant shear stress or shear rate followed by a gradual
1.3 Definitions identical to those published by another
recovery when the stress or shear rate is reduced to zero.
standardsorganizationorASTMCommitteeareidentifiedwith
arrhenius equation—amathematicalrelationshipbetweenthe
the abbreviation of the name of the organization or the
specific reaction rate and the temperature given as
identifying document and ASTM Committee; for example,
–E/RT
ICTAis the International Confederation for ThermalAnalysis. k 5 Ae (1)
1.4 Definitionsoftermsspecifictoaparticularfield(suchas
where:
dynamic mechanical measurements) are identified with an
kisthereactionrateconstant, Aisthefrequencyfactor, Eisthe
italicized introductory phrase.
energyofactivation, Risthegasconstant,and Tistheabsolute
temperature, (1990).
2. Referenced Documents
beta (b) loss peak—in dynamic mechanical measurement,
2
2.1 ASTM Standards:
second discrete peak in damping curve below the melt, in
D2160 Test Method for Thermal Stability of Hydraulic
order of decreasing temperature or increasing frequency,
Fluids
(D4092, D-20), (1988).
D 4092 Terminology Relating to Dynamic Mechanical
boiling pressure—at a specific temperature, the value of the
Measurements on Plastics
vapor pressure of the liquid at which it is equal to the
E7 Terminology Relating to Metallography
external pressure, (1988).
E473 Terminology Relating to Thermal Analysis
boiling temperature—at a specific pressure, the temperature
at which the vapor pressure of the liquid is equal to the
3. Terminology
external pressure, (1988).
3.1 Terms and Definitions:
capacitance—that property of a system of conductors and
dielectrics that permits the storage of electrical charge when
admittance, Y— the reciprocal of impedance.
a potential difference exists between the conductors.
alpha (a) loss peak—in dynamic mechanical measurement,
first peak in the damping curve below the melt, in order of
DISCUSSION—Capacitance is the ratio of a quantity of electric charge,
Q, to a potential difference, V.Acapacitance value is always positive.
The unit of capacitance is the farad, F, which is equivalent to one
1
coulomb per volt.
This terminology is under the jurisdiction of ASTM Committee E37 on
ThermalMeasurementsandarethedirectresponsibilityofSubcommitteeE37.03on
Celsius—designation of the degree on the International Prac-
Nomenclature and Definitions.
tical Temperature Scale; also used for the name of the scale,
Current edition approved Dec. 1, 2004. Published January 2005. Originally
approved in 1988. Last previous edition approved in 2003 as E1142–97(2003).
as “Celsius Temperature Scale.” Formerly (prior to 1948)
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
called“Centigrade.”TheCelsiustemperaturescaleisrelated
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
to the International Kelvin Temperature Scale by the equa-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tion T =T − 273.16K, (1988).
c
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E1142–04
Centigrade—see Celsius. composition throughout the process; the order of a system
coeffıcient of expansion— see coefficient of linear thermal becomes unary at a composition of congruency, (E7, E-4),
expansion. (1988).
coefficient of linear thermal expansion, a —change in constitutional diagram—graphicalrepresentationofthecom-
l
length, relative to the length of the specimen, accom
...