Thermal analysis of postcured aramid fiber/epoxy composites

In this study, aramid fiber-reinforced polymer (AFRP) composites were prepared and then postcured under specific heating/cooling rates. By dynamic mechanical analysis, the viscoelastic properties of the AFRP composites at elevated temperatures and under various frequencies were determined. Thermomec...

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Autores principales:	Karvanis Konstantinos, Rusnáková Soňa, Krejčí Ondřej, Kalendová Alena
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	aramid fiber epoxy frp post-cure thermal analysis Technology T Chemical technology TP1-1185
Acceso en línea:	https://doaj.org/article/1675cbd01bfc49c6bd6cd68691808d59
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spelling	oai:doaj.org-article:1675cbd01bfc49c6bd6cd68691808d592021-12-05T14:11:03ZThermal analysis of postcured aramid fiber/epoxy composites1605-812710.1515/rams-2021-0036https://doaj.org/article/1675cbd01bfc49c6bd6cd68691808d592021-07-01T00:00:00Zhttps://doi.org/10.1515/rams-2021-0036https://doaj.org/toc/1605-8127In this study, aramid fiber-reinforced polymer (AFRP) composites were prepared and then postcured under specific heating/cooling rates. By dynamic mechanical analysis, the viscoelastic properties of the AFRP composites at elevated temperatures and under various frequencies were determined. Thermomechanical analysis (TMA), in the modes of creep-recovery and stress–relaxation tests, was also performed. Furthermore, differential scanning calorimetry was also used, and the decomposition of the AFRP composites, aramid fibers, and pure postcured epoxy, in two different atmospheres, namely, air atmosphere and nitrogen (N2) atmosphere, was explored by the thermogravimetric analysis (TGA). From this point of view, the aramid fibers showed remarkably thermal resistance, in N2 atmosphere, and the volume fraction of fibers (Φf) was calculated to be Φf = 51%. In the TGA experiments, the postcured AFRP composites showed very good thermal resistance, both in air and N2 atmosphere, and this characteristic in conjunction with their relatively high T g, which is in the range of 85–95°C, depending on the frequency and the determination method, classifies these composites as potential materials in applications where the resistance in high temperatures is a required characteristic.Karvanis KonstantinosRusnáková SoňaKrejčí OndřejKalendová AlenaDe Gruyterarticlearamid fiberepoxyfrppost-curethermal analysisTechnologyTChemical technologyTP1-1185ENReviews on Advanced Materials Science, Vol 60, Iss 1, Pp 479-489 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aramid fiber epoxy frp post-cure thermal analysis Technology T Chemical technology TP1-1185
spellingShingle	aramid fiber epoxy frp post-cure thermal analysis Technology T Chemical technology TP1-1185 Karvanis Konstantinos Rusnáková Soňa Krejčí Ondřej Kalendová Alena Thermal analysis of postcured aramid fiber/epoxy composites
description	In this study, aramid fiber-reinforced polymer (AFRP) composites were prepared and then postcured under specific heating/cooling rates. By dynamic mechanical analysis, the viscoelastic properties of the AFRP composites at elevated temperatures and under various frequencies were determined. Thermomechanical analysis (TMA), in the modes of creep-recovery and stress–relaxation tests, was also performed. Furthermore, differential scanning calorimetry was also used, and the decomposition of the AFRP composites, aramid fibers, and pure postcured epoxy, in two different atmospheres, namely, air atmosphere and nitrogen (N2) atmosphere, was explored by the thermogravimetric analysis (TGA). From this point of view, the aramid fibers showed remarkably thermal resistance, in N2 atmosphere, and the volume fraction of fibers (Φf) was calculated to be Φf = 51%. In the TGA experiments, the postcured AFRP composites showed very good thermal resistance, both in air and N2 atmosphere, and this characteristic in conjunction with their relatively high T g, which is in the range of 85–95°C, depending on the frequency and the determination method, classifies these composites as potential materials in applications where the resistance in high temperatures is a required characteristic.
format	article
author	Karvanis Konstantinos Rusnáková Soňa Krejčí Ondřej Kalendová Alena
author_facet	Karvanis Konstantinos Rusnáková Soňa Krejčí Ondřej Kalendová Alena
author_sort	Karvanis Konstantinos
title	Thermal analysis of postcured aramid fiber/epoxy composites
title_short	Thermal analysis of postcured aramid fiber/epoxy composites
title_full	Thermal analysis of postcured aramid fiber/epoxy composites
title_fullStr	Thermal analysis of postcured aramid fiber/epoxy composites
title_full_unstemmed	Thermal analysis of postcured aramid fiber/epoxy composites
title_sort	thermal analysis of postcured aramid fiber/epoxy composites
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/1675cbd01bfc49c6bd6cd68691808d59
work_keys_str_mv	AT karvaniskonstantinos thermalanalysisofpostcuredaramidfiberepoxycomposites AT rusnakovasona thermalanalysisofpostcuredaramidfiberepoxycomposites AT krejciondrej thermalanalysisofpostcuredaramidfiberepoxycomposites AT kalendovaalena thermalanalysisofpostcuredaramidfiberepoxycomposites
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Thermal analysis of postcured aramid fiber/epoxy composites

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