ASTM D3895-02

Standard Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry

SCOPE
1.1 This test method outlines a procedure for the determination of oxidative-induction time (OIT) of polymeric materials by differential scanning calorimetry (DSC). It is applicable to polyolefin resins that are in a fully stabilized/compounded form.
1.2 The values stated in SI units are to be regarded as the standard.
1.3 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. Specific hazards information is given in Section 8.
Note 1—This test method is similar to ISO 11357-6, but not identical. The temperature used by ISO is 210°C.

General Information

• Status: Historical
• Publication Date: 09-Nov-2002
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.30 - Thermal Properties

Relations

• Replaces: ASTM D3895-98 - Standard Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry
• Effective Date: 10-Nov-2002
• Replaced By: ASTM D3895-03 - Standard Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry
• Effective Date: 01-Nov-2003
• Referred By: ASTM F2986-12(2023) - Standard Specification for Corrugated Polyethylene Pipe and Fittings for Mine Leachate Applications
• Effective Date: 10-Nov-2002
• Referred By: ASTM F876-23 - Standard Specification for Crosslinked Polyethylene (PEX) Tubing
• Effective Date: 10-Nov-2002
• Referred By: ASTM F2720/F2720M-20 - Standard Specification for Glass Fiber Reinforced Polyethylene (PE-GF) Spiral Wound Large Diameter Pipe
• Effective Date: 10-Nov-2002
• Referred By: ASTM D4732-13(2020) - Standard Specification for Cool-Application Filling Compounds for Telecommunications Wire and Cable
• Effective Date: 10-Nov-2002
• Referred By: ASTM D4731-13(2020) - Standard Specification for Hot-Application Filling Compounds for Telecommunications Wire and Cable
• Effective Date: 10-Nov-2002
• Referred By: ASTM E2009-23 - Standard Test Methods for Oxidation Onset Temperature of Hydrocarbons by Differential Scanning Calorimetry
• Effective Date: 10-Nov-2002
• Referred By: ASTM F2788/F2788M-21 - Standard Specification for Metric and Inch-sized Crosslinked Polyethylene (PEX) Pipe
• Effective Date: 10-Nov-2002
• Referred By: ASTM D5885/D5885M-20 - Standard Test Method for Oxidative Induction Time of Polyolefin Geosynthetics by High-Pressure Differential Scanning Calorimetry
• Effective Date: 10-Nov-2002
• Referred By: ASTM F3219-19 - Standard Specification for 3 to 30 in. (75 To 750 mm) Polypropylene (PP) Corrugated Single Wall Pipe and Fittings
• Effective Date: 10-Nov-2002
• Referred By: ASTM F2764/F2764M-23 - Standard Specification for 6 in. to 60 in. [150 mm to 1500 mm] Polypropylene (PP) Corrugated Double and Triple Wall Pipe and Fittings for Non-Pressure Sanitary Sewer Applications
• Effective Date: 10-Nov-2002
• Referred By: ASTM F2929-17(2021) - Standard Specification for Crosslinked Polyethylene (PEX) Tubing of 0.070 in. Wall and Fittings for Radiant Heating Systems up to 75 psig
• Effective Date: 10-Nov-2002
• Referred By: ASTM F2389-23 - Standard Specification for Pressure-rated Polypropylene (PP) Piping Systems
• Effective Date: 10-Nov-2002
• Referred By: ASTM F3378/F3378M-22 - Standard Specification for Crosslinkable Polyethylene (CX-PE) Pipe
• Effective Date: 10-Nov-2002

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: D 3895 – 02
Standard Test Method for
Oxidative-Induction Time of Polyolefins by Differential
1
Scanning Calorimetry
This standard is issued under the fixed designation D 3895; 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* interval to onset of exothermic oxidation of a material at a
specified temperature in an oxygen atmosphere.
1.1 This test method outlines a procedure for the determi-
3.2.2 Abbreviations:
nation of oxidative-induction time (OIT) of polymeric materi-
3.2.3 HDPE—high-density polyethylene.
als by differential scanning calorimetry (DSC). It is applicable
3.2.4 LDPE—low-density polyethylene.
to polyolefin resins that are in a fully stabilized/compounded
3.2.5 LLDPE—linear low-density polyethylene.
form.
3.2.6 OIT—oxidative induction time.
1.2 The values stated in SI units are to be regarded as the
standard.
4. Summary of Test Method
1.3 This standard does not purport to address all of the
4.1 The sample to be tested and the reference material are
safety concerns, if any, associated with its use. It is the
heated at a constant rate in an inert gaseous environment
responsibility of the user of this standard to establish appro-
(nitrogen). When the specified temperature has been reached,
priate safety and health practices and determine the applica-
the atmosphere is changed to oxygen maintained at the same
bility of regulatory limitations prior to use. Specific hazards
flow rate. The specimen is then held at constant temperature
information is given in Section 8.
until the oxidative reaction is displayed on the thermal curve.
NOTE 1—This test method is similar to ISO 11357–6, but not identical.
The time interval from when the oxygen flow is first initiated
The temperature used by ISO is 210°C.
to the oxidative reaction is referred to as the induction period.
4.1.1 The end of the induction period is signaled by an
2. Referenced Documents
abrupt increase in the specimen’s evolved heat or temperature
2.1 ASTM Standards:
and may be observed by a differential scanning calorimeter
D 4703 Practice for Compression Molding Thermoplastic
(DSC). The OIT is determined from the data recorded during
2
Materials into Test Specimens, Plaques, or Sheets
the isothermal test.
3
E 473 Terminology Relating to Thermal Analysis
4.2 The type of containment system used depends on the
E 691 Practice for Conducting an Interlaboratory Study to
intended application use of the material being tested. Polyole-
3
Determine the Precision of a Test Method
fins used in the wire and cable industry typically require copper
E 967 Practice for Temperature Calibration of Differential
or aluminum pans, whereas polyolefins used in geomembrane
Scanning Calorimeters and Differential Thermal Analyz-
and vapor-barrier film applications exclusively use aluminum
3
ers
pans.
4.3 Unless otherwise specified, the analysis temperature
3. Terminology
used in this test has been set arbitrarily at 200.0°C. For samples
3.1 Definitions—Definitions of terms applying to thermal
that have relatively low or high stabilization levels, a different
analysis appear in Terminology E 473.
temperature may be selected (typically between 180 and
3.2 Description of Term Specific to This Standard:
220°C) to yield a thermal curve that can be interpreted and
3.2.1 oxidative induction time—a relative measure of a
analyzed easily.
material’s resistance to oxidative decomposition; it is deter-
mined by the thermoanalytical measurement of the time
5. Significance and Use
5.1 The OIT is a qualitative assessment of the level (or
1
degree) of stabilization of the material tested. This test can be
This test method is under the jurisdiction of ASTM Committee D20 on Plastics
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties used as a quality control measure to monitor the stabilization
(Section D 20.30.07).
level in formulated resin as received from a supplier, prior to
Current edition approved November 10, 2002. Published January 2003. Origi-
extrusion.
nally approved in 1980. Last previous edition approved in 1998 as D 3895 – 98.
2
Annual Book of ASTM Standards, Vol 08.01.
3
Annual Book of ASTM Standards, Vol 14.02.
*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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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.
D 3895 – 02
NOTE
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