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Integrity of PEEK in composite semi-finished products and its impact on impregnation

Abstract : The degradation of different semi-finishedproducts carbon/poly(ether ether ketone) (PEEK) and its impact on consolidation quality have been studied. Fourier Transform Infrared spectrophotometry (FTIR) in ATRmode and calorimetric analyses have demonstratedinitial degradation of semi-finished. FTIR measurements have allowed to detect spectral modifications, with the appearance of C-H and O-H absorption bands attributedtonon-aromatic alkanes and degradation products such as phenols and benzoic acid respectively.DSC thermograms have shown important modifications of melting temperature during cyclic treatments at 400°C for all of the semi-finished matrices.The melting temperature decrease with the number of cycle and this decrease is different between the semi-finished products. The porosity measurements of consolidated parts have allowed to classify the different semi-finished productsand correlate this to degradation. The first results seems to demonstrate that semi-finished product such as the stretch-broken commingled have an important degree of degradation whereas the powdered fabrichave a small one.This behaviour may be due to extremeconditions of NCF spinning which initiate degradation.
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Submitted on : Thursday, December 26, 2019 - 2:12:49 PM
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  • HAL Id : hal-02424003, version 1


Lisa Feuillerat, Olivier de Almeida, Jean-Charles Fontanier, Fabrice Schmidt. Integrity of PEEK in composite semi-finished products and its impact on impregnation. JNC 21 : Journées Nationales sur les Composites 2019, École Nationale Supérieure d'Arts et Métiers (ENSAM) - Bordeaux, Jul 2019, Bordeaux, Talence, France. 10 p. ⟨hal-02424003⟩



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