ASTM D3895-03

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 equivalent. ISO procedure provides additional information not supplied by this test method.

General Information

• Status: Historical
• Publication Date: 31-Oct-2003
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.30 - Thermal Properties

Relations

• Replaces: ASTM D3895-02 - Standard Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry
• Effective Date: 01-Nov-2003
• Replaced By: ASTM D3895-04 - Standard Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry
• Effective Date: 01-Oct-2004
• Referred By: ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
• Effective Date: 01-Nov-2003
• Referred By: ASTM E1860-23 - Standard Test Method for Elapsed Time Calibration of Thermal Analyzers
• Effective Date: 01-Nov-2003
• Referred By: ASTM D6388-18 - Standard Practice for Tests to Evaluate the Chemical Resistance of Geonets to Liquids
• Effective Date: 01-Nov-2003
• Referred By: ASTM F2881/F2881M-21e1 - Standard Specification for 12 to 60 in. [300 to 1500 mm] Polypropylene (PP) Dual Wall Pipe and Fittings for Non-Pressure Storm Sewer Applications
• Effective Date: 01-Nov-2003
• Referred By: ASTM F2987-12(2018) - Standard Specification for Corrugated Polyethylene Pipe and Fittings for Mine Heap Leach Aeration Applications
• Effective Date: 01-Nov-2003
• Referred By: ASTM F2306/F2306M-21 - Standard Specification for 300 mm to 1500 mm [12 in. to 60 in.] Annular Corrugated Profile-Wall Polyethylene (PE) Pipe and Fittings for Non-Pressure Gravity-Flow Storm Sewer and Subsurface Drainage Applications
• Effective Date: 01-Nov-2003
• Referred By: ASTM E2046-19 - Standard Test Method for Reaction Induction Time by Thermal Analysis
• Effective Date: 01-Nov-2003
• Referred By: ASTM F2788/F2788M-21 - Standard Specification for Metric and Inch-sized Crosslinked Polyethylene (PEX) Pipe
• Effective Date: 01-Nov-2003
• Referred By: ASTM F3336-22 - Standard Practice for Lipid Preconditioning of Ultra-High-Molecular-Weight Polyethylene for Accelerated Aging
• Effective Date: 01-Nov-2003
• Referred By: ASTM F2720/F2720M-20 - Standard Specification for Glass Fiber Reinforced Polyethylene (PE-GF) Spiral Wound Large Diameter Pipe
• Effective Date: 01-Nov-2003
• 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: 01-Nov-2003
• Referred By: ASTM F2769-23a - Standard Specification for Polyethylene of Raised Temperature (PE-RT) Plastic Hot and Cold-Water Tubing and Distribution Systems
• Effective Date: 01-Nov-2003
• Referred By: ASTM F3390-20 - Standard Specification for 3 through 24 in. Lined Flexible Corrugated Polyethylene Pipe for Land Drainage Applications
• Effective Date: 01-Nov-2003

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 – 03
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* 3.2 Description of Term Specific to This Standard:
3.2.1 oxidative induction time—a relative measure of a
1.1 This test method outlines a procedure for the determi-
material’s resistance to oxidative decomposition; it is deter-
nation of oxidative-induction time (OIT) of polymeric materi-
mined by the thermoanalytical measurement of the time
als by differential scanning calorimetry (DSC). It is applicable
interval to onset of exothermic oxidation of a material at a
to polyolefin resins that are in a fully stabilized/compounded
specified temperature in an oxygen atmosphere.
form.
3.2.2 Abbreviations:
1.2 The values stated in SI units are to be regarded as the
3.2.3 HDPE—high-density polyethylene.
standard.
3.2.4 LDPE—low-density polyethylene.
1.3 This standard does not purport to address all of the
3.2.5 LLDPE—linear low-density polyethylene.
safety concerns, if any, associated with its use. It is the
3.2.6 OIT—oxidative induction time.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Summary of Test Method
bility of regulatory limitations prior to use. Specific hazards
4.1 The sample to be tested and the reference material are
information is given in Section 8.
heated at a constant rate in an inert gaseous environment
NOTE 1—This test method is similar to ISO 11357–6, but not equiva-
(nitrogen). When the specified temperature has been reached,
lent. ISO procedure provides additional information not supplied by this
the atmosphere is changed to oxygen maintained at the same
test method.
flow rate. The specimen is then held at constant temperature
until the oxidative reaction is displayed on the thermal curve.
2. Referenced Documents
2 The time interval from when the oxygen flow is first initiated
2.1 ASTM Standards:
to the oxidative reaction is referred to as the induction period.
D 4703 Practice for Compression Molding Thermoplastic
4.1.1 The end of the induction period is signaled by an
Materials into Test Specimens, Plaques, or Sheets
abrupt increase in the specimen’s evolved heat or temperature
E 473 Terminology Relating to Thermal Analysis
and may be observed by a differential scanning calorimeter
E 691 Practice for Conducting an Interlaboratory Study to
(DSC). The OIT is determined from the data recorded during
Determine the Precision of a Test Method
the isothermal test.
E 967 Practice for Temperature Calibration of Differential
4.2 The type of containment system used depends on the
Scanning Calorimeters and Differential Thermal Analyzers
intended application use of the material being tested. Polyole-
fins used in the wire and cable industry typically require copper
3. Terminology
or aluminum pans, whereas polyolefins used in geomembrane
3.1 Definitions—Definitions of terms applying to thermal
and vapor-barrier film applications exclusively use aluminum
analysis appear in Terminology E 473.
pans.
4.3 Unless otherwise specified, the analysis temperature
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics
used in this test has been set arbitrarily at 200.0°C. For samples
and is the direct responsibility of Subcommittee D20.30 on Thermal Properties
that have relatively low or high stabilization levels, a different
(Section D 20.30.07).
temperature may be selected (typically between 180 and
Current edition approved November 1, 2003. Published January 2004. Originally
approved in 1980. Last previous edition approved in 2002 as D 3895 – 02. 220°C) to yield a thermal curve that can be interpreted and
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
analyzed easily.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
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D 3895 – 03
5. Significance and Use 6.12 Thickness Gage.
6.13 Laboratory Gas Burner, for copper-pan oxidation.
5.1 The OIT is a qualitative assessment of the level (or
6.14 Boiling Flask, with condenser and heating mantle.
degree) of stabilization of the material tested. Thi
...