UV-curable urethane acrylate zirconium oxide nanocomposites: Synthesis,study on viscoelastic properties and thermal behavior

Abstract

In the present study, UV-curable urethane acrylate was synthesized by the reaction of isophorone diisocyanate with1,4-butanediol and 2-hydroxyethyl methacrylate in the presence of dibutyltin dilaurate as a catalyst and acetone as a solvent. The structure of urethane acrylate oligomer was characterized by nuclear magnetic resonance and Fourier transform infrared spectroscopy. In order to examine the influence of inorganic phase of zirconium oxide nanoparticles on characteristics of synthesized resin, organic–inorganic nanocomposites were prepared by urethane acrylate resin and nano zirconium oxide with 1, 3, and 5 wt%. In order to improve nanoparticles dispersion, the surface of zirconium oxide nanoparticles was modified by vinyltrimethoxysilane coupling agent. The analysis of nanoparticle surface modification by Fourier transform infrared spectroscopy and scanning electron microscopy suggested a good reaction of vinyltrimethoxysilane with the surface of zirconium oxide nanoparticles. The characteristics of the prepared nanocomposites were evaluated through thermogravimetric analysis and dynamic mechanical thermal analysis. All of conducted tests represented improved thermal stability properties, storage modulus, and viscoelastic properties of urethane acrylate–zirconium oxide nanocomposites in comparison with polymeric coatings without nanoparticles.

Keywords

Nanocomposites urethane acrylate zirconium oxide thermal stability viscoelastic properties

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