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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...

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Autores principales: Phromviyo, Nutthakritta, Boonlakhorn, Jakkree, Posi, Patcharapol, Thongbai, Prasit, Chindaprasirt, Prinya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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.
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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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