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

Cristian-Dragos Varganici; Liliana Rosu; Dan Rosu; Irina Rosca; Maurusa-Elena Ignat; Leonard Ignat

doi:10.3390/polym16010067

journal article Open Access Dec 25, 2023

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

Cristian-Dragos Varganici

Liliana Rosu Dan Rosu

Irina Rosca

Maurusa-Elena Ignat Leonard Ignat

Polymers Vol. 16 No. 1 pp. 67 · MDPI AG

View at Publisher Save 10.3390/polym16010067

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.

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Published: Dec 25, 2023
Vol/Issue: 16(1)
Pages: 67
License: View

Authors

C

Cristian-Dragos Varganici