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Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites
Cetyl trimethyl ammonium bromide (CTAB)-modified natural rubber latex/Portland cement paste (CTAB + NL/PC) composites were fabricated by varying the NL/cement and CTAB/cement ratios to improve the elastic property of PC. The stability and workability of the CTAB-modified NL particles in the PC matri...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8777851/ https://www.ncbi.nlm.nih.gov/pubmed/35054726 http://dx.doi.org/10.3390/polym14020320 |
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author | Phromviyo, Nutthakritta Boonlakhorn, Jakkree Posi, Patcharapol Thongbai, Prasit Chindaprasirt, Prinya |
author_facet | Phromviyo, Nutthakritta Boonlakhorn, Jakkree Posi, Patcharapol Thongbai, Prasit Chindaprasirt, Prinya |
author_sort | Phromviyo, Nutthakritta |
collection | PubMed |
description | Cetyl trimethyl ammonium bromide (CTAB)-modified natural rubber latex/Portland cement paste (CTAB + NL/PC) composites were fabricated by varying the NL/cement and CTAB/cement ratios to improve the elastic property of PC. The stability and workability of the CTAB-modified NL particles in the PC matrix were significantly improved. The microstructure and dielectric property analyses of PC, CTAB/PC, NL/PC, and (CTAB + NL)/PC composites were performed to describe the interaction mechanism between the CTAB-modified NL and PC. The portlandite phase in PC was reduced by incorporating CTAB + NL. Although the tensile strength of NL/PC was significantly increased, its compressive strength also greatly decreased by ~40.3%. The tensile and compressive strengths of CTAB/PC were not significantly improved. Notably, the tensile strength of (CTAB + NL)/PC was significantly increased compared to those of PC, CTAB/PC, and NL/PC, while the depreciated compressive strength was only 18.7%. The optimized compressive–tensile performance of (CTAB + NL)/PC was equal to that of PC. The dielectric constants of NL/PC, CTAB/PC, and (CTAB + NL)/PC were reduced due to the low dielectric constant of NL and the ability of CTAB to capture negative charges in the PC matrix, leading to a reduction in the negative surface charges and hence the interfacial polarization. This result was confirmed by the decreased loss tangent in a low-frequency range, which is usually reduced by decreasing the free charges. This work provides a comprehensive guideline for significantly improving the elastic property of PC while retaining a high compressive strength. |
format | Online Article Text |
id | pubmed-8777851 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-87778512022-01-22 Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites Phromviyo, Nutthakritta Boonlakhorn, Jakkree Posi, Patcharapol Thongbai, Prasit Chindaprasirt, Prinya Polymers (Basel) Article Cetyl trimethyl ammonium bromide (CTAB)-modified natural rubber latex/Portland cement paste (CTAB + NL/PC) composites were fabricated by varying the NL/cement and CTAB/cement ratios to improve the elastic property of PC. The stability and workability of the CTAB-modified NL particles in the PC matrix were significantly improved. The microstructure and dielectric property analyses of PC, CTAB/PC, NL/PC, and (CTAB + NL)/PC composites were performed to describe the interaction mechanism between the CTAB-modified NL and PC. The portlandite phase in PC was reduced by incorporating CTAB + NL. Although the tensile strength of NL/PC was significantly increased, its compressive strength also greatly decreased by ~40.3%. The tensile and compressive strengths of CTAB/PC were not significantly improved. Notably, the tensile strength of (CTAB + NL)/PC was significantly increased compared to those of PC, CTAB/PC, and NL/PC, while the depreciated compressive strength was only 18.7%. The optimized compressive–tensile performance of (CTAB + NL)/PC was equal to that of PC. The dielectric constants of NL/PC, CTAB/PC, and (CTAB + NL)/PC were reduced due to the low dielectric constant of NL and the ability of CTAB to capture negative charges in the PC matrix, leading to a reduction in the negative surface charges and hence the interfacial polarization. This result was confirmed by the decreased loss tangent in a low-frequency range, which is usually reduced by decreasing the free charges. This work provides a comprehensive guideline for significantly improving the elastic property of PC while retaining a high compressive strength. MDPI 2022-01-13 /pmc/articles/PMC8777851/ /pubmed/35054726 http://dx.doi.org/10.3390/polym14020320 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Phromviyo, Nutthakritta Boonlakhorn, Jakkree Posi, Patcharapol Thongbai, Prasit Chindaprasirt, Prinya Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites |
title | Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites |
title_full | Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites |
title_fullStr | Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites |
title_full_unstemmed | Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites |
title_short | Dielectric and Mechanical Properties of CTAB-Modified Natural Rubber Latex–Cement Composites |
title_sort | dielectric and mechanical properties of ctab-modified natural rubber latex–cement composites |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8777851/ https://www.ncbi.nlm.nih.gov/pubmed/35054726 http://dx.doi.org/10.3390/polym14020320 |
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