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Influence of composite preform fabrication on the integrity of poly‐aryl‐ether‐ketone matrices

De Almeida, Olivier; Feuillerat, Lisa; Nouri, Vivien and Choquet, Karim (2021) Influence of composite preform fabrication on the integrity of poly‐aryl‐ether‐ketone matrices. Journal of Applied Polymer Science, pp. 1-1550719.

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Document available online at: https://hal.archives-ouvertes.fr/hal-03192033


Summary

Poly-Aryl-Ether-Ketones (PAEK) matrices of different composite preforms were evaluated to assess the influence of the preform manufacturing on the matrix integrity. Yarns, films, and impregnation suspensions were character- ized by gel permeation chromatography, Fourier transform infrared spectros- copy, thermogravimetric analysis, differential scanning calorimetry, and rheometry. As described in literature, changes in the matrix properties at mol- ten state are observed for all materials. The degradation process is related to a crosslinking process that results in an increase of viscosity and a decrease of crystallization temperature. Differences in degradation behavior were observed depending on the type of preform. Film and yarn extrusion has a limited effect on PAEK behavior, apart from a slight shift in molecular weight, without sig- nificant effect on degradation kinetics. However, the organic products that are used for the preparation of semifinished composite products, that is, yarn sizing or suspension additives, have a detrimental effect on stability. The deg- radation of additives considerably increases the degradation kinetics of the PAEK matrices, and by modifying the thermo-oxidation mechanisms, the advantages of using complex preforms for consolidation can be annihilated.


EPrint Type:Journal paper
Keywords:crystallization (en), degradation (en), molecular recognition (en), rheology (en), thermogravimetric analysis (en)
Subjects:"Organics" in general
Research affiliation: France > INRAe - Institut national de recherche pour l’agriculture, l’alimentation et l’environnement
ISSN:ISSN: 0021-8995
DOI:10.1002/app.50719
Related Links:https://hal.archives-ouvertes.fr/hal-03192033/document
Project ID:HAL-INRAe
Deposited By: PENVERN, Servane
ID Code:40365
Deposited On:12 Aug 2021 10:37
Last Modified:12 Aug 2021 10:37
Document Language:English

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