ASTM D3012-04
(Test Method)Standard Test Method for Thermal-Oxidative Stability of Propylene Plastics Using a Specimen Rotator Within an Oven
Standard Test Method for Thermal-Oxidative Stability of Propylene Plastics Using a Specimen Rotator Within an Oven
SCOPE
1.1 This test method provides a means for estimating the resistance of polypropylene, in molded form, to accelerated aging by heat in the presence of air using a forced draft oven.
1.2 The stability determined by this test method is not directly related to the suitability of the material for use when different environmental conditions prevail and shall not be used to predict performance.Note 1
The specified thermal levels in this test method are considered sufficiently severe to cause failure of commercial grades of heat-stable polypropylene within a reasonable period of time. If desired, lower temperatures can be applied to estimate the performance of polypropylene with lower heat stabilities.
1.3 The values stated in SI units are to be regarded as the standard. The values in brackets are for information only.
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 2
This test method and ISO 4577-1983 are technically similar but different in preparation of test specimens, thickness of test specimen, measurement of the number of air flow changes in the ovens, and the number of air changes per hour required.
1.4 The purpose of this appendix is to provide a secondary method for determining the number of air exchanges that occur within the forced draft oven used for measurement of thermal oxidative stability.
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Designation:D3012–04
Standard Test Method for
Thermal-Oxidative Stability of Polypropylene Using a
1
Specimen Rotator Within an Oven
This standard is issued under the fixed designation D 3012; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope* D 4101 Specification for Polypropylene Injection and Ex-
trusion Materials
1.1 This test method provides a means for estimating the
D 5374 Test Methods for Forced-Convection Laboratory
resistance of polypropylene, in molded form, to accelerated
Ovens for Evaluation of Electrical Insulation
aging by heat in the presence of air using a forced draft oven.
E 1 Specification for ASTM Thermometers
1.2 The stability determined by this test method is not
E 77 Test Method for Inspection and Verification of Ther-
directly related to the suitability of the material for use when
mometers
different environmental conditions prevail and shall not be
E 220 Test Method for Calibration of Thermocouples by
used to predict performance.
Comparison Techniques
NOTE 1—Thespecifiedthermallevelsinthistestmethodareconsidered
E 608 Specification for Metal-Sheathed Base-Metal Ther-
sufficiently severe to cause failure of commercial grades of heat-stable
mocouples
polypropylene within a reasonable period of time. If desired, lower
E 644 Test Methods for Testing Industrial Resistance Ther-
temperatures can be applied to estimate the performance of polypropylene
mometers
with lower heat stabilities.
E 691 Practice for Conducting an Interlaboratory Study to
1.3 The values stated in SI units are to be regarded as the
Determine the Precision of a Test Method
standard. The values in brackets are for information only.
E 1137 Specification for Industrial Platinum Resistance
1.4 This standard does not purport to address all of the
Thermometers
safety concerns, if any, associated with its use. It is the
3
2.2 ISO Standard:
responsibility of the user of this standard to establish appro-
ISO 4577–1983 Plastics—Polypropylene and Propylene
priate safety and health practices and determine the applica-
Copolymers—Determination of Thermal Oxidative Sta-
bility of regulatory limitations prior to use.
bility in Air-Oven Method
NOTE 2—This test method and ISO 4577–1983 are technically similar
ISO 1873 Plastics—Polypropylene and Propylene-
but different in preparation of test specimens, thickness of test specimen,
Copolymer Thermoplastics:
measurement of the number of air flow changes in the ovens, and the
Part 1: Designation
number of air changes per hour required.
Part 2: Determination of Properties
2. Referenced Documents
3. Terminology
2
2.1 ASTM Standards:
3.1 Definitions—The definitions of plastics used in this test
D 618 Practice for Conditioning Plastics and Electrical
method are in accordance with Terminology D 883 unless
Insulating Materials for Testing
otherwise indicated.
D 883 Terminology Relating to Plastics
D 3641 Practice for Injection Molding Test Specimens of
4. Summary of Test Method
Thermoplastic Molding and Extrusion Materials
4.1 Aging is accelerated by exposing the specimens to an
elevated temperature in a forced draft oven equipped with a
1 biaxial or uniaxial rotating specimen holder.
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materi- 4.2 Visual examination is used to determine the time to
als.
failure. The time to failure of the material is taken as the
Current edition approved March 1, 2004. Published April 2004. Originally
approved in 1972. Last previous edition approved in 2000 as D 3012 - 00.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 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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D3012–04
number of days after which the specimen shows localized 6.2.3 Thermocouples shall comply with the requirements of
crazing, crumbling, or discoloration, or a combination thereof. Specification E 608 and shall be calibrated in accordance with
Method E 220.
5. Significance and Use 6.2.4 Resistance thermometers shall comply with the re-
quirements of Test Methods E 644 and Specification E 1137,
5.1 U
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