ASTM D1525-09
(Test Method)Standard Test Method for Vicat Softening Temperature of Plastics
Standard Test Method for Vicat Softening Temperature of Plastics
SIGNIFICANCE AND USE
Data obtained by this test method is used to compare the heat-softening qualities of thermoplastic materials.
This test method is useful in the areas of quality control, development, and characterization of plastic materials.
SCOPE
1.1 This test method covers determination of the temperature at which a specified needle penetration occurs when specimens are subjected to specified controlled test conditions.
1.2 This test method is not recommended for ethyl cellulose, nonrigid poly(vinyl chloride), poly(vinylidene chloride), or other materials having a wide Vicat softening range.
1.3 The values stated in SI units are to be regarded as standard.
1.4 Due to the potential safety and environmental hazards associated with mercury-filled thermometers, the use of alternative temperature measuring devices (such as thermocouples and RTDs) is encouraged.
1.5 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.
Note 1—This test method is equivalent to ISO 306 in all sections with the exceptions of the allowance for creep, prior to the beginning of the test and the allowance of the fluidized powder as a heat transfer medium.
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Designation: D1525 − 09
Standard Test Method for
1
Vicat Softening Temperature of Plastics
This standard is issued under the fixed designation D1525; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope E77Test Method for Inspection and Verification of Ther-
mometers
1.1 This test method covers determination of the tempera-
E608/E608MSpecification for Mineral-Insulated, Metal-
ture at which a specified needle penetration occurs when
Sheathed Base Metal Thermocouples
specimens are subjected to specified controlled test conditions.
E691Practice for Conducting an Interlaboratory Study to
1.2 This test method is not recommended for ethyl
Determine the Precision of a Test Method
cellulose, nonrigid poly(vinyl chloride), poly(vinylidene
E1137/E1137MSpecification for Industrial Platinum Resis-
chloride), or other materials having a wide Vicat softening
tance Thermometers
range. 4
2.2 ISO Standards:
ISO 306Plastics—Thermoplastic Material—Determination
1.3 The values stated in SI units are to be regarded as
standard. of Vicat Softening Temperature
1.4 Due to the potential safety and environmental hazards
3. Terminology
associated with mercury-filled thermometers, the use of alter-
3.1 Definitions:
native temperature measuring devices (such as thermocouples
3.1.1 Definitions of plastics used in this test method are in
and RTDs) is encouraged.
accordance with those defined in Terminology D883, unless
1.5 This standard does not purport to address all of the
otherwise specified.
safety concerns, if any, associated with its use. It is the
3.1.2 Vicat softening temperature—thetemperatureatwhich
2
responsibility of the user of this standard to establish appro-
a flat-ended needle of 1-mm circular cross section will
priate safety and health practices and determine the applica-
penetrate a thermoplastic specimen to a depth of 1 mm under
bility of regulatory limitations prior to use.
a specified load using a selected uniform rate of temperature
rise.
NOTE 1—This test method is equivalent to ISO306 in all sections with
theexceptionsoftheallowanceforcreep,priortothebeginningofthetest
4. Summary of Test Method
and the allowance of the fluidized powder as a heat transfer medium.
4.1 A flat-ended needle loaded with a specified mass is
2. Referenced Documents
placedindirectcontactwithatestspecimen.Themassapplied
2
can be one of two accepted loads, as follows:
2.1 ASTM Standards:
D618Practice for Conditioning Plastics for Testing Loading1 21060.2N
D883Terminology Relating to Plastics
Loading2 25061.0N
3
D1898Practice for Sampling of Plastics (Withdrawn 1998)
The specimen and needle are heated at either of two permis-
E1Specification for ASTM Liquid-in-Glass Thermometers
sible rates, as follows:
RateA 25065°C/h
RateB 2120610°C/h
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD20onPlastics
The temperature at which the needle has penetrated to a
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties
depth of 1 60.01 mm is recorded as the Vicat softening
(Section D20.30.07).
temperature.
Current edition approved Nov. 15, 2009. Published December 2009. Originally
approved in 1958. Last previous edition approved in 2007 as D1525-07. DOI:
5. Significance and Use
10.1520/D1525-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 Dataobtainedbythistestmethodisusedtocomparethe
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
heat-softening qualities of thermoplastic materials.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
4
The last approved version of this historical standard is referenced on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
www.astm.org. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D1525 − 09
FIG. 1 Apparatus for Softening Temperature Determination (Immersion Bath)
5.2 Thistestmethodisusefulintheareasofqualitycontrol,
development, and characterization of plastic materials.
6. Apparatus
6.1 Theinstrumentshallhaveaheatingsystemconsistingof
a heated bath (see Fig. 1) or a contact heating system (see Fig.
2):
The equipment shall be constructed essentially as shown in
and shall consist of the following:
6.1.1 Immersion Bath—An immersion bath cont
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D1525–07 Designation: D1525 – 09
Standard Test Method for
1
Vicat Softening Temperature of Plastics
This standard is issued under the fixed designation D1525; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope *
1.1 This test method covers determination of the temperature at which a specified needle penetration occurs when specimens
are subjected to specified controlled test conditions.
1.2 This test method is not recommended for ethyl cellulose, nonrigid poly(vinyl chloride), poly(vinylidene chloride), or other
materials having a wide Vicat softening range.
1.3 The values stated in SI units are to be regarded as standard.
1.4Due1.4 Due to the potential safety and environmental hazards associated with mercury-filled thermometers, the use of
alternative temperature measuring devices (such as thermocouples and RTDs) is encouraged.
1.5 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.
NOTE1—This test method and ISO 306:1987(E) are technically equivalent, with the exception of the allowance for creep, prior to beginning the test,
in this test method. 1—This test method is equivalent to ISO306 in all sections with the exceptions of the allowance for creep, prior to the beginning
of the test and the allowance of the fluidized powder as a heat transfer medium.
2. Referenced Documents
2
2.1 ASTM Standards:
D618 Practice for Conditioning Plastics for Testing
D883 Terminology Relating to Plastics
3
D1898 Practice for Sampling of Plastics
E1 Specification for ASTM Liquid-in-Glass Thermometers
E77 Test Method for Inspection and Verification of Thermometers
E608/E608M Specification for Mineral-Insulated, Metal-Sheathed Base Metal Thermocouples
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1137/E1137M Specification for Industrial Platinum Resistance Thermometers
4
2.2 ISO Standards:
ISO 306 Plastics—Thermoplastic Material—Determination of Vicat Softening Temperature
3. Terminology
3.1 Definitions—Definitions of plastics used in this test method are in accordance with those defined in Terminology D883,
unless otherwise specified.
2
3.1.1 Vicat softening temperature—the temperature at which a flat-ended needle of 1-mm circular cross section will penetrate
a thermoplastic specimen to a depth of 1 mm under a specified load using a selected uniform rate of temperature rise.
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.30 onThermal Properties (Section
D20.30.07).
Current edition approved March 1, 2007. Published March 2007. Originally approved in 1958. Last previous edition approved in 2006 as D1525-06. DOI:
10.1520/D1525-07.
Current edition approved Nov. 15, 2009. Published December 2009. Originally approved in 1958. Last previous edition approved in 2007 as D1525-07. DOI:
10.1520/D1525-09.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Withdrawn.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D1525 – 09
FIG. 1 Apparatus for Softening Temperature Determination (Immersion Bath)
4. Summary of Test Method
4.1 Aflat-ended needle loaded with a specified mass is placed in direct contact with a test specimen. The mass applied can be
one of two accepted loads, as follows:
Loading1—10 60.2N
The specimen and needle are heated at either of two permissible rates, as follows:
The temperature at which the needle has penetrated to a depth of 1 60.01 mm is recorded as the Vicat softening temperature.
5. Significance
...
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