Synthesis, characterization, and application of polyurethane/2-hydoxyethyl methacrylate hybrids as additives to unsaturated polyester resins
Negim E.-S. Yeligbayeva G. Al Azzam K.M. Irmukhametova G. Bekbayeva L. Kalugin S.N. Uskenbayeva S.
April 2024Springer Science and Business Media Deutschland GmbH
Polymer Bulletin
2024#81Issue 54459 - 4475 pp.
Polyurethane/2-hydoxyethyl methacrylate (PU/2-HEMA) hybrids with the modifying properties of unsaturated polyester resin (UPR) were prepared through two steps of polymerization. In the first step, polyurethane prepolymers (PUA) were prepared with an NCO/OH ratio of 2.2 by a polyaddition reaction based on isophorone diisocyanate (IPDI), polyoxypropylene glycol (PPG 2000), and PPG 2700. In the second step, the hybrid was prepared by adding and mixing different contents of 2-hydroxyethyl methacrylate (2-HEMA) to prepolymer polyurethane (PUA). The effect of PUA and PUA/2-HEMA hybrid on the physicomechanical properties of UPR films was studied, including viscosity, compressive strength, hardness, thixotropy, and gamma radiation resistance. The addition of PUA/2-HEMA hybrids improved the physical and mechanical properties of UPR more than the addition of PUA owing to the existence of functional groups derived from PUA and PUA/2-HEMA, such as NCO, double bonds, and NH, which can establish cross-linking between UPR and PUA, as well as between UPR and PUA/2-HEMA. The findings demonstrate that the mechanical properties improve with dose, indicating cross-linking involving the double bonds of 2-HEMA, NH, C=O, as well as the ether group over oxidative degradation. However, an increase in 2-HEMA content in PUA hybrids increases the gamma radiation resistance, tensile, and compressive strengths demonstrating that cross-linking leads over oxidative degradation. This is attributed to the formation of the polymeric network as a result of cross-linking between PUA and 2-HEMA as indicated in the experimental results shown in Table 3 and Schemes 2 and 3.
Acrylic , Hybrid , NCO/OH , Polyurethane , UPR
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School of Petroleum Engineering, Satbayev University, 22 Satpayev Street, Almaty, 050013, Kazakhstan
School of Materials Science and Green Technologies, Kazakh-British Technical University, 59 Tole Bi St., Almaty, 050000, Kazakhstan
Department of Pharmaceutical Sciences, Faculty of Pharmacy, Pharmacological and Diagnostic Research Center (PDRC), Al-Ahliyya Amman University, Amman, 19328, Jordan
Department of Chemistry &Technology of Organic Materials, Polymers and Natural Compounds, Al-Faraby Kazakh National University, 71, Al-Faraby Av., Almaty, 050040, Kazakhstan
Department of Chemistry, S.D. Asfendiyarov Kazakh National Medical University, 88 Tole Bi St., Almaty, Kazakhstan
School of Petroleum Engineering
School of Materials Science and Green Technologies
Department of Pharmaceutical Sciences
Department of Chemistry &Technology of Organic Materials
Department of Chemistry
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