Synthesis and characterization of ethylenediamine-modified F-44 phenolic epoxy fiber / Juan Wu in INTERNATIONAL POLYMER PROCESSING, Vol. 39, N° 3 (2024)  

[article]  inINTERNATIONAL POLYMER PROCESSING > Vol. 39, N° 3 (2024) . - p. 336-344 Titre : Synthesis and characterization of ethylenediamine-modified F-44 phenolic epoxy fiber Type de document : texte imprimé Auteurs : Juan Wu, Auteur ; Mingli Jiao, Auteur ; Hao Wang, Auteur ; Keke Li, Auteur ; Muen Yang, Auteur ; Pengyu Li, Auteur ; Kai Yang, Auteur Année de publication : 2024 Article en page(s) : p. 336-344 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Caractérisation Copolymère phénolique époxy Ethylènediamine Fibres textiles -- Propriétés mécaniques Fibres textiles synthétiques Filature à sec Matériaux -- Modifications chimiques Mesure Index. décimale : 668.4 Plastiques, vinyles Résumé : F-44 phenolic epoxy fibers were produced through high-temperature dry spinning utilizing F-44 phenolic epoxy resin as the base material, combined with n-butanol and ethylenediamine (EDA) as the curing agent. The fibers were subsequently analyzed for their structural, thermal stability, microstructural, and mechanical properties using techniques such as Fourier transform infrared spectroscopy, micro-infrared imaging, thermogravimetric analysis, nuclear magnetic resonance, scanning electron microscopy, and fiber strength testing. The limitations of phenolic resins, including high brittleness, poor toughness, and low elongation at break, restrict their potential applications, necessitating modifications to broaden their utility. Research findings indicate that modifying EDA induces a ring-opening reaction of epoxy groups, thereby enhancing the resin’s structure and improving the thermal stability and mechanical properties of fibers. The thermal stability and mechanical strength of the fibers were optimized at an EDA concentration of 2.0 wt% and curing time of 30 min, resulting in a tensile strength of 105 MPa and an elongation at break of 27.6 %. Note de contenu : - EXPERIMENTAL : Raw materials - Preparation of as-spun fibers - Preparation of cured fibers - MEASUREMENTS AND CHARACTERIZATION - RESULTS AND DISCUSSION : FTIR - Microscopic infrared analysis - 13C nuclear magnetic resonance Spectra (NMR) - Thermogravimetric analysis (TGA) - Scanning electron microscopy (SEM) - Mechanical property analysis DOI : https://doi.org/10.1515/ipp-2023-4465 En ligne : https://drive.google.com/file/d/1Z6b5ZezJS2Q2NNhS9HFGRMYB3kOIStLT/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40875 [article]

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