ASTM G114-07 - 15.3.2007
 
1. Scope

1.1 These practices describe several procedures that are used to determine the age resistance of plastic, thermosetting, and elastomeric materials exposed to oxygen-containing media.

1.2 While this practice focuses on evaluating the age resistance of polymeric materials in oxygen-containing media prior to ignition and combustion testing, it also has relevance for evaluating the age resistance of metals.

1.3 These practices address both established procedures that have a foundation of experience and new procedures that have yet to be validated. The latter are included to promote research and later elaboration in this practice as methods of the former type.

1.4 The results of these practices may not give exact correlation with service performance since service conditions vary widely and may involve multiple factors.

1.5 Three procedures are described for evaluating the age resistance of polymeric materials depending on application and information sought.

1.5.1 Procedure A: Natural Aging This procedure is used to simulate the effect(s) of one or more service stressors on a materials oxygen resistance, and is suitable for evaluating materials that experience continuous or intermittent exposure to elevated temperature during service.

1.5.2 Procedure B: Accelerated Aging Comparative Oxygen Resistance This procedure is suitable for evaluating materials that are used in ambient temperature service, or at a temperature that is otherwise lower than the aging temperature, and is useful for developing oxygen compatibility rankings on a laboratory comparison basis.

1.5.3 Procedure C: Accelerated Aging Lifetime Prediction This procedure is used to determine the relationship between aging temperature and a fixed level of property change, thereby allowing predictions to be made about the effect of prolonged service on oxidative degradation.

1.6 The values stated in SI units are to be regarded as the standard, however, all numerical values must also be cited in the systems in which they were actually measured.

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 precautionary statements are given in Section 10.

 
2. Referenced Documents

G72-01

Standard Test Method for Autogenous Ignition Temperature of Liquids and Solids in a High-Pressure Oxygen-Enriched Environment

CGA G-4.3 Type I QVL E

Commodity Specification for Oxygen Available from Compressed Gas Association (CGA), 4221 Walney Rd., 5th Floor, Chantilly, VA 20151-2923, http://www.cganet.com.

D1708-18

Standard Test Method for Tensile Properties of Plastics by Use of Microtensile Specimens

D2240-15(2021)

Standard Test Method for Rubber Property—Durometer Hardness

D2512-17

Standard Test Method for Compatibility of Materials with Liquid Oxygen (Impact Sensitivity Threshold and Pass-Fail Techniques) (Withdrawn 2023)

D2863-23

Standard Test Method for Measuring the Minimum Oxygen Concentration to Support Candle-Like Combustion of Plastics (Oxygen Index)

D3039

Test Method for Tensile Properties of Polymer Matrix Composite Materials

D3045-18

Standard Practice for Heat Aging of Plastics Without Load

D4809-18

Standard Test Method for Heat of Combustion of Liquid Hydrocarbon Fuels by Bomb Calorimeter (Precision Method)

G63-15(2023)

Standard Guide for Evaluating Nonmetallic Materials for Oxygen Service

G74-13(2021)

Standard Test Method for Ignition Sensitivity of Nonmetallic Materials and Components by Gaseous Fluid Impact

G86-17

Standard Test Method for Determining Ignition Sensitivity of Materials to Mechanical Impact in Ambient Liquid Oxygen and Pressurized Liquid and Gaseous Oxygen Environments

G125-00(2023)

Standard Test Method for Measuring Liquid and Solid Material Fire Limits in Gaseous Oxidants

G126-16(2023)

Standard Terminology Relating to the Compatibility and Sensitivity of Materials in Oxygen Enriched Atmospheres

D395-18

Standard Test Methods for Rubber Property´Compression Set

D412-16(2021)

Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension

D638-22

Standard Test Method for Tensile Properties of Plastics

MIL-PRF-27210

Amendment 1--Oxygen, Aviators Breathing, Liquid and Gas Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dsp.dla.mil.

D1349-14(2019)

Standard Practice for Rubber´Standard Conditions for Testing