Structure–Properties Relationships Involved in the Embrittlement of Epoxies

Autor:	Romain Delannoy, Vincent Tognetti, Emmanuel Richaud
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	epoxy-diamine networks thermal oxidation embrittlement Organic chemistry QD241-441
Zdroj:	Polymers, Vol 14, Iss 21, p 4685 (2022)
Druh dokumentu:	article
ISSN:	2073-4360
DOI:	10.3390/polym14214685
Popis:	This paper illustrates a study of the thermal oxidation of several epoxy amine networks. Oxidation was followed at the molecular scale using Fourier Transform InfraRed spectroscopy (FTIR) and at the macromolecular scale using tensile tests. FTIR showed the major formation of amides, while tensile tests showed the progressive increase in the elastic modulus (~0.5 GPa for room temperature Young modulus) and decrease in ultimate strain and volumic energy for failure (assessed using the integrals of stress-strain curves). Both ultimate strain and volumic energy were divided by more than two. Linear correlations between oxidation trackers (amide concentration) and changes in mechanical parameters are presented and discussed.
Databáze:	Directory of Open Access Journals
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