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Effects of NCO:OH ratio and HEMA on the physicochemical properties of photocurable poly(ester-urethane)methacrylates

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Abstract

A series of UV-curable isophorone diisocyanate-based poly(ester-urethane)methacrylate (IPEUMA) oligomers were synthesized by a two-step polymerization process. The amount of isophorone diisocyanate was varied during the synthesis. The effects of NCO:OH ratio and HEMA on the structural and physicochemical properties of UV-cured IPEUMAs were investigated. As the NCO:OH ratio increased, the tensile strength and thermal stability increased, whereas the elongation and hydrolytic degradation of the film decreased. The higher strength and thermal stability for higher NCO:OH ratio may be due to the increase in intermolecular hydrogen bonding in the UV-cured film. UV-cured IPEUMA films also show excellent chemical and solvent resistance.

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Acknowledgments

One of the authors Ganesh S. Bhusari is thankful to the Director, VNIT, Nagpur (India) for awarding a research fellowship.

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Authors and Affiliations

  1. Department of Chemistry, Visvesvaraya National Institute of Technology (VNIT), Nagpur, 440 010, India

    Ganesh S. Bhusari & Suresh S. Umare

  2. Metlok Pvt. Ltd, Kalmeshwar, Nagpur, 441 501, India

    Ajay S. Chandure

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  1. Ganesh S. Bhusari
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Correspondence to Suresh S. Umare.

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Bhusari, G.S., Umare, S.S. & Chandure, A.S. Effects of NCO:OH ratio and HEMA on the physicochemical properties of photocurable poly(ester-urethane)methacrylates. J Coat Technol Res 12, 571–585 (2015). https://doi.org/10.1007/s11998-014-9635-2

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