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Published in: Journal of Coatings Technology and Research 6/2021

10-09-2021

UV-curable polyurethane inorganic–organic hybrid coatings

Authors: Tong Xu, Irina J. Zvonkina, Mark D. Soucek

Published in: Journal of Coatings Technology and Research | Issue 6/2021

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Abstract

A UV-curable inorganic/organic hybrid coating was prepared from a methacrylated urethane oligomer, a reactive diluent, tetraethyl orthosilicate (TEOS) oligomers, and a free radical photoinitiator. The reactive diluent was synthesized using IPDI, HEMA, and aminopropyltetraethoxysilane (APTES), resulting in both inorganic and organic reactive groups. The photocuring kinetics was investigated using photo-DSC and real-time FTIR spectroscopy. The effect of the reactive diluent and TEOS oligomers concentration was investigated using impact resistance, pencil hardness, and adhesion. Two glass transition temperatures were observed, indicating a substantial interfacial phase generated between the inorganic and organic domains. The reactive diluent-to-reactive oligomer ratio had a larger effect on the mechanical behavior of the system than the TEOS concentration did. Adhesion improves with increasing TEOS oligomer concentration or reactive diluent concentration until maxima, after which increasing concentration has an adverse effect on adhesion.

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Metadata
Title
UV-curable polyurethane inorganic–organic hybrid coatings
Authors
Tong Xu
Irina J. Zvonkina
Mark D. Soucek
Publication date
10-09-2021
Publisher
Springer US
Published in
Journal of Coatings Technology and Research / Issue 6/2021
Print ISSN: 1547-0091
Electronic ISSN: 1935-3804
DOI
https://doi.org/10.1007/s11998-021-00473-1

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