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Abstract— <p>The production of soft and flexible products using photopolymer printing in a vat allows for the rapid production of customized products at low cost. However, according to recent research, the resulting materials do not have high strength characteristics. In this work, we investigated the targeted synthesis of oligourethane methacrylates and the influence of their structures on the technological parameters of the vat photopolymerization process. For this purpose, a series of oligomers based on <i>tert</i>-butylaminoethyl methacrylate were synthesized using various isocyanates. The reactivity, viscosity and strength characteristics of materials based on the obtained compounds were studied, and the self-healing ability was also assessed. The nature of the deblocking of isocyanate groups was confirmed using DSC and FTIR spectroscopy methods. Using <i>tert</i>-butylaminoethyl methacrylate and a chain extending agent (diaminodicyclohexylmethane) made it possible to increase the tensile strength σ<sub>tens</sub> up to 9 MPa with a relative elongation at break ε of about 300%. The use of OH-containing chain extending agents ensured that ε exceeded 600%. The developed approaches allow for the targeted creation of light-curing compositions for photopolymer printing, combining high printing speed and the required mechanical properties of products.</p>

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Oligourethane Urea Methacrylates Based on tert-Butylaminoethylmethacrylate for Photopolymer 3D Printing

  • 期刊论文

  • 发表日期：

    2026年4月1日

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  • Yu. G. Rudenko,
  • N. V. Fedyakova,
  • M. V. Bermeshev,
  • P. P. Chapala

摘要

Abstract—

The production of soft and flexible products using photopolymer printing in a vat allows for the rapid production of customized products at low cost. However, according to recent research, the resulting materials do not have high strength characteristics. In this work, we investigated the targeted synthesis of oligourethane methacrylates and the influence of their structures on the technological parameters of the vat photopolymerization process. For this purpose, a series of oligomers based on tert-butylaminoethyl methacrylate were synthesized using various isocyanates. The reactivity, viscosity and strength characteristics of materials based on the obtained compounds were studied, and the self-healing ability was also assessed. The nature of the deblocking of isocyanate groups was confirmed using DSC and FTIR spectroscopy methods. Using tert-butylaminoethyl methacrylate and a chain extending agent (diaminodicyclohexylmethane) made it possible to increase the tensile strength σtens up to 9 MPa with a relative elongation at break ε of about 300%. The use of OH-containing chain extending agents ensured that ε exceeded 600%. The developed approaches allow for the targeted creation of light-curing compositions for photopolymer printing, combining high printing speed and the required mechanical properties of products.