Long-Term Environmental Aging of Polymer Composite Coatings: Characterization and Evaluation by Dynamic Mechanical Analysis
Year: 2025
Type: article
Abstract: Fluorinated polyurethanes (FPUs) and their composites are promising new barrier materials with a broad range of applications. In particular, they are widely used as effective hydrophobic coatings that perform well under prolonged environmental exposure. Despite their extensive use, the behavior of FPU coatings under specific climatic conditions remains insufficiently studied. In this paper, dynamic mechanical analysis (DMA) is employed to evaluate the structural, mechanical, and relaxation evidence of climatic aging for paint-and-varnish coatings, which protect the surfaces of metallic alloys and polymer composites. Special knowledge of structural and physical–mechanical properties—such as a glass transition temperature (Tg), elastic moduli (E′ and E″) in both glassy and elastic states, degree of crosslinking, and other features relevant to coatings designated for climatic impact prevention—can be reliably obtained by the DMA technique. Along with previously published data, the currently obtained results for FPU have been analyzed for a long time (three years) of exposure in a wide range of climatic regions in Russia.
Source: Journal of Composites Science
DOI: 10.3390/jcs9120645
Institutions: Kurchatov Institute, All Russian Scientific Research Institute of Aviation Materials, Siberian Branch of the Russian Academy of Sciences, Plekhanov Russian University of Economics, Russian Academy of Sciences, Institute of Biochemical Physics NM Emanuel, Peoples' Friendship University of Russia, Semenov Institute of Chemical Physics
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,172
Funder: Russian Science Foundation
Award: G1491270715
OpenAlex ID: W4416783183