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Molecular Dynamics and Structure of Poly(Methyl Methacrylate) Chains Grafted from Barium Titanate Nanoparticles
Core−shell nanocomposites comprising barium titanate, BaTiO(3) (BTO), and poly(methyl methacrylate) (PMMA) chains grafted from its surface with varied grafting densities were prepared. BTO nanocrystals are high-k inorganic materials, and the obtained nanocomposites exhibit enhanced dielectric permit...
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/PMC9571223/ https://www.ncbi.nlm.nih.gov/pubmed/36234912 http://dx.doi.org/10.3390/molecules27196372 |
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author | Wypych-Puszkarz, Aleksandra Cetinkaya, Onur Yan, Jiajun Udovytska, Ruslana Jung, Jarosław Jenczyk, Jacek Nowaczyk, Grzegorz Jurga, Stefan Ulański, Jacek Matyjaszewski, Krzysztof Pietrasik, Joanna Kozanecki, Marcin |
author_facet | Wypych-Puszkarz, Aleksandra Cetinkaya, Onur Yan, Jiajun Udovytska, Ruslana Jung, Jarosław Jenczyk, Jacek Nowaczyk, Grzegorz Jurga, Stefan Ulański, Jacek Matyjaszewski, Krzysztof Pietrasik, Joanna Kozanecki, Marcin |
author_sort | Wypych-Puszkarz, Aleksandra |
collection | PubMed |
description | Core−shell nanocomposites comprising barium titanate, BaTiO(3) (BTO), and poly(methyl methacrylate) (PMMA) chains grafted from its surface with varied grafting densities were prepared. BTO nanocrystals are high-k inorganic materials, and the obtained nanocomposites exhibit enhanced dielectric permittivity, as compared to neat PMMA, and a relatively low level of loss tangent in a wide range of frequencies. The impact of the molecular dynamics, structure, and interactions of the BTO surface on the polymer chains was investigated. The nanocomposites were characterized by broadband dielectric and vibrational spectroscopies (IR and Raman), transmission electron microscopy, differential scanning calorimetry, and nuclear magnetic resonance. The presence of ceramic nanoparticles in core–shell composites slowed down the segmental dynamic of PMMA chains, increased glass transition temperature, and concurrently increased the thermal stability of the organic part. It was also evidenced that, in addition to segmental dynamics, local β relaxation was affected. The grafting density influenced the self-organization and interactions within the PMMA phase, affecting the organization on a smaller size scale of polymeric chains. This was explained by the interaction of the exposed surface of nanoparticles with polymer chains. |
format | Online Article Text |
id | pubmed-9571223 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-95712232022-10-17 Molecular Dynamics and Structure of Poly(Methyl Methacrylate) Chains Grafted from Barium Titanate Nanoparticles Wypych-Puszkarz, Aleksandra Cetinkaya, Onur Yan, Jiajun Udovytska, Ruslana Jung, Jarosław Jenczyk, Jacek Nowaczyk, Grzegorz Jurga, Stefan Ulański, Jacek Matyjaszewski, Krzysztof Pietrasik, Joanna Kozanecki, Marcin Molecules Article Core−shell nanocomposites comprising barium titanate, BaTiO(3) (BTO), and poly(methyl methacrylate) (PMMA) chains grafted from its surface with varied grafting densities were prepared. BTO nanocrystals are high-k inorganic materials, and the obtained nanocomposites exhibit enhanced dielectric permittivity, as compared to neat PMMA, and a relatively low level of loss tangent in a wide range of frequencies. The impact of the molecular dynamics, structure, and interactions of the BTO surface on the polymer chains was investigated. The nanocomposites were characterized by broadband dielectric and vibrational spectroscopies (IR and Raman), transmission electron microscopy, differential scanning calorimetry, and nuclear magnetic resonance. The presence of ceramic nanoparticles in core–shell composites slowed down the segmental dynamic of PMMA chains, increased glass transition temperature, and concurrently increased the thermal stability of the organic part. It was also evidenced that, in addition to segmental dynamics, local β relaxation was affected. The grafting density influenced the self-organization and interactions within the PMMA phase, affecting the organization on a smaller size scale of polymeric chains. This was explained by the interaction of the exposed surface of nanoparticles with polymer chains. MDPI 2022-09-27 /pmc/articles/PMC9571223/ /pubmed/36234912 http://dx.doi.org/10.3390/molecules27196372 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 Wypych-Puszkarz, Aleksandra Cetinkaya, Onur Yan, Jiajun Udovytska, Ruslana Jung, Jarosław Jenczyk, Jacek Nowaczyk, Grzegorz Jurga, Stefan Ulański, Jacek Matyjaszewski, Krzysztof Pietrasik, Joanna Kozanecki, Marcin Molecular Dynamics and Structure of Poly(Methyl Methacrylate) Chains Grafted from Barium Titanate Nanoparticles |
title | Molecular Dynamics and Structure of Poly(Methyl Methacrylate) Chains Grafted from Barium Titanate Nanoparticles |
title_full | Molecular Dynamics and Structure of Poly(Methyl Methacrylate) Chains Grafted from Barium Titanate Nanoparticles |
title_fullStr | Molecular Dynamics and Structure of Poly(Methyl Methacrylate) Chains Grafted from Barium Titanate Nanoparticles |
title_full_unstemmed | Molecular Dynamics and Structure of Poly(Methyl Methacrylate) Chains Grafted from Barium Titanate Nanoparticles |
title_short | Molecular Dynamics and Structure of Poly(Methyl Methacrylate) Chains Grafted from Barium Titanate Nanoparticles |
title_sort | molecular dynamics and structure of poly(methyl methacrylate) chains grafted from barium titanate nanoparticles |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9571223/ https://www.ncbi.nlm.nih.gov/pubmed/36234912 http://dx.doi.org/10.3390/molecules27196372 |
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