Science and Technology Production
Article
Authorship
Capiel Guillermina
;
Uicich, Julieta
;
Florencia, Arrosio
;
Fasce, Diana
;
MORAN, JUAN IGNACIO
;
Montemartini Pablo
Date
2021
Publishing House and Editing Place
ELSEVIER SCI LTD
Magazine
POLYMER DEGRADATION AND STABILITY
ELSEVIER SCI LTD
Summary
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SIGEVA
Hydrothermal aging of an epoxy-anhydride network was investigated to elucidate the degradation effects of the external medium pH. For that reason, gravimetric analysis, Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and modulated differential scanning calorimetry (MDSC) were carried out. For each studied pH, degraded materials showed two values of glass transition temperature suggesting a homogeneous process. Both FTIR and GPC results exhibited signals rela...
Hydrothermal aging of an epoxy-anhydride network was investigated to elucidate the degradation effects of the external medium pH. For that reason, gravimetric analysis, Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), and modulated differential scanning calorimetry (MDSC) were carried out. For each studied pH, degraded materials showed two values of glass transition temperature suggesting a homogeneous process. Both FTIR and GPC results exhibited signals related to the presence of hydrolyzed network fragments at long times for pH 4 and 7 and at very short times for pH 13. Indicating that at pH 13 both bulk and surface degradation coexist.
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Key Words
hydrolysiswater absorptionhomogeneous degradationHygrothermal agingheterogeneous degradationpoxy-anhydride networks