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Polymers
Volume 16
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10.3390/polym16010067
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Article

Surface Degradation of DGEBA Epoxy Resins Cured with Structurally Different Amine Hardeners: Effects of UV Radiation

by
Cristian-Dragos Varganici
,
Liliana Rosu
*,
Dan Rosu
*,
Irina Rosca
,
Maurusa-Elena Ignat
and
Leonard Ignat
Centre of Advanced Research in Bionanoconjugates and Biopolymers, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
*
Authors to whom correspondence should be addressed.
Polymers 2024, 16(1), 67; https://doi.org/10.3390/polym16010067
Submission received: 4 December 2023 / Revised: 19 December 2023 / Accepted: 22 December 2023 / Published: 25 December 2023
(This article belongs to the Section Polymer Applications)
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Abstract

In this study, the effects of three diamine curing agents (aromatic, cycloaliphatic, aliphatic) on the photochemical behavior of bisphenol A diglycidyl ether networks were comparatively examined. In order to monitor structural changes and study the curing agents’ action mode, the cured epoxy resins were characterized before and after photoirradiation by means of Fourier-transform infrared spectroscopy, contact angle, differential scanning calorimetry, scanning electron microscopy, and energy-dispersive X-ray analysis, mass loss, and color modification measurements. Water absorption tests were also conducted. The cured epoxy resins are to be used in different multicomponent polymer materials for outdoor protection. The presence of the cycloaliphatic hardener led to reduced water absorption, and after UV irradiation, an increase in the glass transition temperature and lowest mass loss of the corresponding cured epoxy resin compared to the ones cured with aromatic and aliphatic hardener.
Keywords: epoxy resins; DGEBA; cured DGEBA; hardeners for epoxy; epoxy UV irradiation epoxy resins; DGEBA; cured DGEBA; hardeners for epoxy; epoxy UV irradiation

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MDPI and ACS Style

Varganici, C.-D.; Rosu, L.; Rosu, D.; Rosca, I.; Ignat, M.-E.; Ignat, L. Surface Degradation of DGEBA Epoxy Resins Cured with Structurally Different Amine Hardeners: Effects of UV Radiation. Polymers 2024, 16, 67. https://doi.org/10.3390/polym16010067

AMA Style

Varganici C-D, Rosu L, Rosu D, Rosca I, Ignat M-E, Ignat L. Surface Degradation of DGEBA Epoxy Resins Cured with Structurally Different Amine Hardeners: Effects of UV Radiation. Polymers. 2024; 16(1):67. https://doi.org/10.3390/polym16010067

Chicago/Turabian Style

Varganici, Cristian-Dragos, Liliana Rosu, Dan Rosu, Irina Rosca, Maurusa-Elena Ignat, and Leonard Ignat. 2024. "Surface Degradation of DGEBA Epoxy Resins Cured with Structurally Different Amine Hardeners: Effects of UV Radiation" Polymers 16, no. 1: 67. https://doi.org/10.3390/polym16010067

APA Style

Varganici, C.-D., Rosu, L., Rosu, D., Rosca, I., Ignat, M.-E., & Ignat, L. (2024). Surface Degradation of DGEBA Epoxy Resins Cured with Structurally Different Amine Hardeners: Effects of UV Radiation. Polymers, 16(1), 67. https://doi.org/10.3390/polym16010067

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