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Self-Healing Thermal-Reversible Low-Temperature Polyurethane Powder Coating Based on Diels-Alder Reaction.
Pojnar, Katarzyna; Pilch-Pitera, Barbara; Ataei, Shahla; Gazdowicz, Patrycja; Mossety-Leszczak, Beata; Grabowska, Beata; Bobrowski, Artur.
Afiliación
  • Pojnar K; Doctoral School of Engineering and Technical Sciences, Rzeszow University of Technology, ul. Powstanców Warszawy 12, 35-959 Rzeszów, Poland.
  • Pilch-Pitera B; Faculty of Chemistry, Rzeszow University of Technology, ul. Powstanców Warszawy 6, 35-959 Rzeszów, Poland.
  • Ataei S; Harsin Chemical Homa Company, Garmsar 3593147487, Iran.
  • Gazdowicz P; Faculty of Chemistry, Rzeszow University of Technology, ul. Powstanców Warszawy 6, 35-959 Rzeszów, Poland.
  • Mossety-Leszczak B; Faculty of Chemistry, Rzeszow University of Technology, ul. Powstanców Warszawy 6, 35-959 Rzeszów, Poland.
  • Grabowska B; Faculty of Foundry Engineering, AGH University of Science and Technology, ul. Reymonta 23, 30-059 Kraków, Poland.
  • Bobrowski A; Faculty of Foundry Engineering, AGH University of Science and Technology, ul. Reymonta 23, 30-059 Kraków, Poland.
Materials (Basel) ; 17(14)2024 Jul 18.
Article en En | MEDLINE | ID: mdl-39063847
ABSTRACT
This work focused on obtaining a low-temperature powder coating characterized by self-healing properties. To achieve this, acrylic resin, blocked polyisocyanates (bPICs) with 1,2,4-triazole, and unsaturated commercial resin were used. The synthesis of bPICs with triazole enabled the low-temperature curing and reversible Diels-Alder (DA) reaction at 160 °C. The chemical structure of bPICs was confirmed using 1H-NMR. The occurrence of the DA and retro-DA (rDA) reactions in the crosslinked polymer, at temperatures of 60-85 °C and 90-130 °C, respectively, was confirmed using Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), and FT-IR spectroscopy. The self-healing properties of the powder coating were examined using polarized optical microscopy. Additionally, the occurrence of the DA and rDA reactions between triazole and unsaturated polyester resin was investigated through repeated self-healing tests.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Materials (Basel) Año: 2024 Tipo del documento: Article País de afiliación: Polonia Pais de publicación: Suiza
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Materials (Basel) Año: 2024 Tipo del documento: Article País de afiliación: Polonia Pais de publicación: Suiza