Content of Composite Prepreg by ASTM D3529

Matrix Solids Content and Matrix Content of Composite Prepreg using ASTM D3529

The method ASTM D3529 is used to determine solids content and matrix content of composite material prepregs. Matrix Content is defined as the amount of matrix present in a composite or prepreg expressed either as percent by weight or percent by volume. Matrix Solids Content is calculated by subtracting the average mass loss due to volatiles from the initial test mass. Volatiles Content can be obtained by ASTM D3530.

Test Procedure:
Specimens are machined from the customer supplied product. The specimens are dried and cooled. The weight of the test specimens is then determined to the nearest 0.1mg. The specimens are then placed in an appropriate dissolution medium and heated/refluxed (if needed) until all of the organic material is dissolved. The resulting solution is then filtered and the amount of remaining fiber is determined.

Specimen size:
80mm x 80mm

The Matrix Content is then determined as follows: Wt = (Mi – Mf) / Mi * 100
Wt = percent by weight
Mi = initial mass of specimen
Mf= final mass of specimen

**Please note that this test description is intentionally generic in nature and aimed at providing a descriptive summary to enhance test understanding. Standards can be obtained from appropriate standard authorities.

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