Standard Test Method for Vicat Softening Temperature of Plastics

SIGNIFICANCE AND USE
Data obtained by this test method may be 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 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.

General Information

Status
Historical
Publication Date
28-Feb-2007
Technical Committee
Drafting Committee
Current Stage
Ref Project

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ASTM D1525-07 - Standard Test Method for Vicat Softening Temperature of Plastics
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D1525–07
Standard Test Method for
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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* E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This test method covers determination of the tempera-
E1137/E1137M Specification for Industrial Platinum Resis-
ture at which a specified needle penetration occurs when
tance Thermometers
specimens are subjected to specified controlled test conditions.
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2.2 ISO Standards:
1.2 This test method is not recommended for ethyl cellu-
ISO 306 Plastics—Thermoplastic Material—Determination
lose, nonrigid poly(vinyl chloride), poly(vinylidene chloride),
of Vicat Softening Temperature
or other materials having a wide Vicat softening range.
1.3 The values stated in SI units are to be regarded as
3. Terminology
standard.
3.1 Definitions—Definitions of plastics used in this test
1.4 Due to the potential safety and environmental hazards
method are in accordance with those defined in Terminology
associated with mercury-filled thermometers, the use of alter-
D883, unless otherwise specified.
native temperature measuring devices (such as thermocouples
3.1.1 Vicat softening temperature—the temperature at
and RTDs) is encouraged.
2
which a flat-ended needle of 1-mm circular cross section will
1.5 This standard does not purport to address all of the
penetrate a thermoplastic specimen to a depth of 1 mm under
safety concerns, if any, associated with its use. It is the
a specified load using a selected uniform rate of temperature
responsibility of the user of this standard to establish appro-
rise.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Summary of Test Method
NOTE 1—ThistestmethodandISO306:1987(E)aretechnicallyequiva-
4.1 A flat-ended needle loaded with a specified mass is
lent, with the exception of the allowance for creep, prior to beginning the
placedindirectcontactwithatestspecimen.Themassapplied
test, in this test method.
can be one of two accepted loads, as follows:
2. Referenced Documents
Loading1—10 60.2N
2
2.1 ASTM Standards: Loading2—50 61.0N
D618 Practice for Conditioning Plastics for Testing
The specimen and needle are heated at either of two permis-
D883 Terminology Relating to Plastics
sible rates, as follows:
3
D1898 Practice for Sampling of Plastics
RateA—50 65°C/h
E1 Specification for ASTM Liquid-in-Glass Thermometers
RateB—120 610°C/h
E77 Test Method for Inspection and Verification of Ther-
mometers
The temperature at which the needle has penetrated to a depth
E608/E608M Specification for Mineral-Insulated, Metal-
of1 60.01mmisrecordedastheVicatsofteningtemperature.
Sheathed Base Metal Thermocouples
5. Significance and Use
5.1 Data obtained by this test method may be used to
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD20onPlastics
compare the heat-softening qualities of thermoplastic materi-
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties
(Section D20.30.07). als.
Current edition approved March 1, 2007. Published March 2007. Originally
5.2 Thistestmethodisusefulintheareasofqualitycontrol,
approved in 1958. Last previous edition approved in 2006 as D1525-06. DOI:
development, and characterization of plastic materials.
10.1520/D1525-07.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
4
the ASTM website. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
3
Withdrawn. 4th Floor, New York, NY 10036.
*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.
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D1525–07
FIG. 1 Apparatus for Softening Temperature Determination
6. Apparatus 0.02 mm when the specimen is replaced by a piece of
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heat-resistant material.
6.1 Theequipmentshallbeconstructedessentiallyasshown
6.1.4 Penetration-Measuring Device—The device used for
in Fig. 1 and shall consist of the following:
measuring the penetration of the specimen shall be capable of
6.1.1 Immersion Bath—The bath containing the heat-
measuring a penetration depth of at least 1 60.01 mm. The
transfer medium sha
...

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