Advanced Coatings of Polyureas for Building Blast Protection: Physical, Chemical, Thermal and Mechanical Characterization
Due to the increase in the global terrorist threat, there has been a growing demand for materials that can more efficiently protect civil, industrial, and military structures against explosions. In this sense, two new commercial polyureas (A and B), that present high potential to be used as a protec...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/21/10879 |
| _version_ | 1797469243961245696 |
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| author | Fernando Leite Carlos Mota João Bessa Fernando Cunha Raul Fangueiro Gabriel Gomes José Mingote |
| author_facet | Fernando Leite Carlos Mota João Bessa Fernando Cunha Raul Fangueiro Gabriel Gomes José Mingote |
| author_sort | Fernando Leite |
| collection | DOAJ |
| description | Due to the increase in the global terrorist threat, there has been a growing demand for materials that can more efficiently protect civil, industrial, and military structures against explosions. In this sense, two new commercial polyureas (A and B), that present high potential to be used as a protective coating on building facades against explosions, were compared in this work, through several tests. Chemical characterization with the Scanning Electron Microscope (SEM) of the surface of the polyureas revealed that the commercial polyurea A has a heterogeneous surface while the other polyurea has a more uniform and homogeneous surface, resulting in a more compact structure. The shock-wave attenuation ability of polyurea is believed to be controlled primarily by the hard domains. The TGA tests revealed that polyurea B has more hard segments than polyurea A in its composition. The mechanical tests performed showed that polyurea B has significantly better tensile properties-almost 3000% of maximum deformation capacity compared with approximately 115% of polyurea A. Thus, it was concluded that polyurea B has more potential to be used as a coating in building blast protection due to its exceptional elongation characteristics, a critical parameter to absorb the high frequency and intensity of blasts. |
| first_indexed | 2024-03-09T19:18:37Z |
| format | Article |
| id | doaj.art-f78657df4c9049bcbfe686bd9a61a6bd |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T19:18:37Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-f78657df4c9049bcbfe686bd9a61a6bd2023-11-24T03:34:21ZengMDPI AGApplied Sciences2076-34172022-10-0112211087910.3390/app122110879Advanced Coatings of Polyureas for Building Blast Protection: Physical, Chemical, Thermal and Mechanical CharacterizationFernando Leite0Carlos Mota1João Bessa2Fernando Cunha3Raul Fangueiro4Gabriel Gomes5José Mingote6Centre for Textile Science and Technology, School of Engineering, University of Minho—Campus of Azurém, 4800-058 Guimarães, PortugalCentre for Textile Science and Technology, School of Engineering, University of Minho—Campus of Azurém, 4800-058 Guimarães, PortugalCentre for Textile Science and Technology, School of Engineering, University of Minho—Campus of Azurém, 4800-058 Guimarães, PortugalCentre for Textile Science and Technology, School of Engineering, University of Minho—Campus of Azurém, 4800-058 Guimarães, PortugalCentre for Textile Science and Technology, School of Engineering, University of Minho—Campus of Azurém, 4800-058 Guimarães, PortugalMilitary Academy Research Center (CINAMIL), Instituto Universitário Militar, Rua Gomes Freire, 1169-203 Lisbon, PortugalNATO Counter Improvised Explosive Devices Centre of Excellence (C-IED COE), Hoyo de Manzanares, 28240 Madrid, SpainDue to the increase in the global terrorist threat, there has been a growing demand for materials that can more efficiently protect civil, industrial, and military structures against explosions. In this sense, two new commercial polyureas (A and B), that present high potential to be used as a protective coating on building facades against explosions, were compared in this work, through several tests. Chemical characterization with the Scanning Electron Microscope (SEM) of the surface of the polyureas revealed that the commercial polyurea A has a heterogeneous surface while the other polyurea has a more uniform and homogeneous surface, resulting in a more compact structure. The shock-wave attenuation ability of polyurea is believed to be controlled primarily by the hard domains. The TGA tests revealed that polyurea B has more hard segments than polyurea A in its composition. The mechanical tests performed showed that polyurea B has significantly better tensile properties-almost 3000% of maximum deformation capacity compared with approximately 115% of polyurea A. Thus, it was concluded that polyurea B has more potential to be used as a coating in building blast protection due to its exceptional elongation characteristics, a critical parameter to absorb the high frequency and intensity of blasts.https://www.mdpi.com/2076-3417/12/21/10879polyureablast protectionelongationcoating |
| spellingShingle | Fernando Leite Carlos Mota João Bessa Fernando Cunha Raul Fangueiro Gabriel Gomes José Mingote Advanced Coatings of Polyureas for Building Blast Protection: Physical, Chemical, Thermal and Mechanical Characterization Applied Sciences polyurea blast protection elongation coating |
| title | Advanced Coatings of Polyureas for Building Blast Protection: Physical, Chemical, Thermal and Mechanical Characterization |
| title_full | Advanced Coatings of Polyureas for Building Blast Protection: Physical, Chemical, Thermal and Mechanical Characterization |
| title_fullStr | Advanced Coatings of Polyureas for Building Blast Protection: Physical, Chemical, Thermal and Mechanical Characterization |
| title_full_unstemmed | Advanced Coatings of Polyureas for Building Blast Protection: Physical, Chemical, Thermal and Mechanical Characterization |
| title_short | Advanced Coatings of Polyureas for Building Blast Protection: Physical, Chemical, Thermal and Mechanical Characterization |
| title_sort | advanced coatings of polyureas for building blast protection physical chemical thermal and mechanical characterization |
| topic | polyurea blast protection elongation coating |
| url | https://www.mdpi.com/2076-3417/12/21/10879 |
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