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Influence of the Degree of Crystallinity on Moisture Uptake and Mechanical Properties of AS4/PEKK

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Title: Influence of the Degree of Crystallinity on Moisture Uptake and Mechanical Properties of AS4/PEKK

Authors: Sandi Miller, Paula Heimann, Meelad Ranaiefar, Daniel Gorican, Javier Buenrostro, Daniel Scheiman, Joseph Pinakidis, Michael Pereira

DOI: 10.33599/nasampe/c.24.0301

Abstract: Application of polymer matrix composites in extreme environments is limited by material performance in elevated temperature and wet conditions. Thermoplastic composites (TPCs) used for structural aerospace applications are typically semi-crystalline where the mechanical properties are influenced by the degree of crystallinity (DOC) and the DOC is dependent on the manufacturing process. While the low moisture absorption of TPCs has been documented in the literature a reduction in mechanical properties has also been reported following conditioning in a hot/wet environment. For this work, AS4/PEKK test coupons were manufactured with both fully crystallized (25%-30%) and partially crystallized (10%-15%) matrices. All coupons were tested in compression and in-plane shear at room temperature and under elevated temperature/wet (ETW) conditions. The influence of crystallinity and hot/wet exposure on matrix dominated mechanical properties of AS4/PEKK is reported.

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Conference: CAMX 2024 | San Diego CA

Publication Date: 2024/9/9

SKU: TP24-0000000301

Pages: 11

Price: $22.00

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