The Role of Interfacial Effects in Hydrothermal Aging of Aramid Composites
| Autor: | T. A. Nenasheva, A. A. Dalinkevich, I. G. Kalinina |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Moisture 020209 energy Diffusion Organic Chemistry Kinetics Metals and Alloys Modulus 02 engineering and technology Epoxy 021001 nanoscience & nanotechnology Hydrothermal circulation Surfaces Coatings and Films Aramid visual_art 0202 electrical engineering electronic engineering information engineering Materials Chemistry Shear strength visual_art.visual_art_medium Composite material 0210 nano-technology |
| Zdroj: | Protection of Metals and Physical Chemistry of Surfaces. 57:352-360 |
| ISSN: | 2070-206X 2070-2051 |
| DOI: | 10.1134/s2070205121020040 |
| Popis: | The results of comparative studies of hydrothermal aging of epoxy organic plastics based on the Rusar and Armos high-strength and -modulus aramid fibers are presented. Kinetic laws of moisture transport into the composites were established, the corresponding parameters were determined, and the kinetics of changes in the shear strength of organic plastics under forced exposure to heat and moisture was determined. It was shown that the diffusion of water vapors into the composite materials can be described with a good approximation by Fick’s law. Moreover, we obtained a closer approximation to Fick’s law for Rusar organic plastic (with the deviations being smaller) compared to the Armos organic plastic. A kinetic model of a decrease in the interlayer shear strength of the composites upon exposure to heat and moisture is suggested. Differences in the parameters of water sorption kinetics and the interlayer shear strength of organic plastics are attributed to the different surface polarity and morphology of initial fibers and, respectively, to the differences in the arrangement of interfacial layers in the composites. |
| Databáze: | OpenAIRE |
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