The effect of glass transition temperature of commercial epoxy-amine coatings on their performance in marine environment / Muhammad Ahsan Bashir ; Heng Li ; Vivian B. Farstad in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 3 (05/2023)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 20, N° 3 (05/2023) . - p. 919-933 Titre : The effect of glass transition temperature of commercial epoxy-amine coatings on their performance in marine environment Type de document : texte imprimé Auteurs : Muhammad Ahsan Bashir, Auteur ; Heng Li, Auteur ; Vivian B. Farstad, Auteur Année de publication : 2023 Article en page(s) : p. 919-933 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Analyse mécanique dynamique Calorimétrie Epoxy amine Milieu marin Revêtements organiques Test d'immersion Index. décimale : 667.9 Revêtements et enduits Résumé : Glass transition temperature (Tg) of the commercial epoxy–amine marine coatings is among the most important thermo-mechanical properties which determine the performance of the individual coat and the whole coating system. Ingress of (sea) water and temperature are known to have an influence on the Tg of model epoxy–amine coatings. This work shows the use of thermal analysis techniques like temperature-modulated differential scanning calorimetry (MDSC) and dynamic mechanical analysis (DMA) to study the effect of water immersion and immersion temperature on the Tg of four different commercial epoxy–amine coatings. In addition, Fourier transform infrared (FTIR) spectroscopy was used to study the chemical changes that occurred in the epoxy–amine network upon immersion in water at 40 and 60°C. The results obtained clearly show that the Tg is significantly influenced by water and water immersion temperature if the Tg (or the Tg region) of the epoxy–amine coating is lower than the immersion temperature. FTIR results showed that chemical changes can happen in the epoxy–amine network upon water immersion. Practical example of the effect of Tg of coatings on their protective performance has been demonstrated by using the NACE TM-0174 standard’s equipment which showed that the low Tg epoxy–amine coatings will lose their protective properties earlier than the high Tg coatings when exposed to similar test conditions. Note de contenu : - Table 1 : Tg and mixing ratio of the different commercial products used in this work - Table 2 : Comparison of Tgs of four products measured by using reversing heat flow (rev HF), total heat flow (total HF) in MDSC with the Tg estimated from peak of loss modulus (E″) and peak of tan δ - Table 3 : Comparison of Tg of reference sample and the samples taken from different places on NACE cell panels exposed to 65°C for 15 days DOI : https://doi.org/10.1007/s11998-022-00712-z En ligne : https://link.springer.com/content/pdf/10.1007/s11998-022-00712-z.pdf?pdf=button% [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=39437 [article]

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Code-barres	Cote	Support	Localisation	Section	Disponibilité
24069	-	Périodique	Bibliothèque principale	Documentaires	Disponible

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