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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...

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Autores principales: 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
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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.
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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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