A number in parentheses indicates the year of last reapproval. A superscript epsilon indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. Consistent evaluation and comparison of the response of polymer matrix composites to moisture absorption can only be performed when the material has been brought to a uniform through-thethickness moisture profile. The procedures described in Test Method D and Practices D do not guarantee moisture equilibrium of the material. A similar, but more rigorous, procedure for conditioning to equilibrium is described by this test method, which can also be used with fluid moisture other than water, and which, additionally, can provide the moisture absorption properties necessary for the analysis of single-phase Fickian moisture diffusion within such materials.
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Moisture absorption of matrix composites ASTM D scope: Moisture Absorption of Matrix Composites ASTM D is a gravimetric test method that monitors change over time of moisture content by measuring the total mass change of a coupon that is exposed to a specified environment. Within ASTM D there are three other procedures covering material conditioning within a specific moisture environment.
The side edges are then sealed to prevent moisture absorption through the sides. The specimens are then dried, removed from the drying oven, and allowed to cool in a desiccator. The specimens are then weighed on an analytical balance to the nearest 0.
The specimens are then placed in the appropriate conditioning environment. The specimens are removed from the conditioning environment periodically, allowed to equilibrate to room temperature in a sealed container, and weighed. This procedure is repeated until there is no discernable increase in specimen weight. Send us a request Need help or have a question? Need help or have a question? Send us a request X Title.
Moisture Absorption of Matrix Composites by ASTM D5229
Active view current version of standard. Other Historical Standards. Work Item s - proposed revisions of this standard. More D Also covered are procedures for conditioning test coupons prior to use in other test methods; either to an essentially moisture-free state, to equilibrium in a standard laboratory atmosphere environment, or to equilibrium in a non-laboratory environment.
Historical Version s - view previous versions of standard. Work Item s - proposed revisions of this standard. More D Multiple tests at differing temperatures are required to establish the dependence of D z on temperature. Multiple tests at differing moisture exposure levels are required to establish the dependence of M m on moisture exposure level.
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