ASTM D3012 - 13

    Standard Test Method for Thermal-Oxidative Stability of Polypropylene Using a Specimen Rotator Within an Oven

    Active Standard ASTM D3012 | Developed by Subcommittee: D20.15

    Book of Standards Volume: 08.01


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    Significance and Use

    5.1 Under the severe conditions of this test method, the specimens undergo degradation at a rate that is dependent upon the thermal endurance of the polypropylene material under examination.

    5.2 The thermal level of this test method is 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 materials with lower heat stability.

    5.3 The technique of specimen rotation described in this test method provides an estimate of the life-temperature relationship of polypropylene. If this test method is conducted at different temperatures on the same material, a more reliable estimate of the life-temperature relationship of polypropylene is determined. This test method can be conducted at several temperatures and the data interpreted through use of the Arrhenius relation, by plotting the logarithms of times to failure against the reciprocals of the temperatures in kelvins (K). Temperatures in the range from 100 to 150°C, with intervals of 10°C, are suggested for this purpose.

    5.4 The stability as determined under the prescribed test method is not directly related to the suitability of the compound for a use where different conditions prevail.

    5.5 The specimen rotation technique of thermal aging increases the probability that all specimens will be exposed similarly and that the effect of temperature gradients in an oven will be minimized.

    1. 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 1The 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 parentheses are for information only.

    1.4  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 2This 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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D618 Practice for Conditioning Plastics for Testing

    D883 Terminology Relating to Plastics

    D3641 Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials

    D4101 Specification for Polypropylene Injection and Extrusion Materials

    D5374 Test Methods for Forced-Convection Laboratory Ovens for Evaluation of Electrical Insulation

    E77 Test Method for Inspection and Verification of Thermometers

    E220 Test Method for Calibration of Thermocouples By Comparison Techniques

    E608 Specification for Mineral-Insulated, Metal-Sheathed Base Metal Thermocouples

    E644 Test Methods for Testing Industrial Resistance Thermometers

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    E1137/E1137M Specification for Industrial Platinum Resistance Thermometers

    E2251 Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids

    ISO Standard

    ISO1873 Plastics--Polypropylene and Propylene-Copolymer Thermoplastics:

    ISO4577–1983 Plastics--Polypropylene and Propylene Copolymers--Determination of Thermal Oxidative Stability in Air-Oven Method

    Part1: Designation

    Part2: Determination of Properties


    ICS Code

    ICS Number Code 83.080.20 (Thermoplastic materials)

    UNSPSC Code

    UNSPSC Code 13102022(Polypropylene PP)


    Referencing This Standard

    DOI: 10.1520/D3012-13

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM D3012-13, Standard Test Method for Thermal-Oxidative Stability of Polypropylene Using a Specimen Rotator Within an Oven, ASTM International, West Conshohocken, PA, 2013, www.astm.org

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