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Moisture Absorption of Matrix Composites (ASTM D5229)

ASTM D5229


Moisture Absorption of Matrix Composites (ASTM D5229) 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 D5229 there are three other procedures covering material conditioning within a specific moisture environment.

Test Procedure:
For Procedure A, at least five 100mm * 100mm test specimens are machined from customer supplied product. 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 0.1mg. 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.

Specimen size:
A common size is 100mm * 100mm.

The mass change at equilibrium is calculated as follows:
Mass Change = (Wi Wb) / Wb * 100

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**Please note that this test description is intentionally generic in nature and aimed at providing a descriptive summary to enhance test understanding. For more information please contact a Intertek PTL Technical Representative at . Due to copyright restrictions, we are not able to provide copies of standards. Standards can be obtained from appropriate standards authorities.

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