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Effect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization

We previously reported that the dispersed rubber microparticles in ethylene-propylene-diene monomer (EPDM)/polypropylene (PP) thermoplastic vulcanizates (TPVs) are actually agglomerates of rubber nanoparticles. In this study, based on this new understanding of the microstructure of TPV, we further r...

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Detalles Bibliográficos
Autores principales: Wu, Hanguang, Tian, Ming, Zhang, Liqun, Tian, Hongchi, Wu, Youping, Ning, Nanying, Hu, Guo-Hua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432384/
https://www.ncbi.nlm.nih.gov/pubmed/30979235
http://dx.doi.org/10.3390/polym8040127
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author Wu, Hanguang
Tian, Ming
Zhang, Liqun
Tian, Hongchi
Wu, Youping
Ning, Nanying
Hu, Guo-Hua
author_facet Wu, Hanguang
Tian, Ming
Zhang, Liqun
Tian, Hongchi
Wu, Youping
Ning, Nanying
Hu, Guo-Hua
author_sort Wu, Hanguang
collection PubMed
description We previously reported that the dispersed rubber microparticles in ethylene-propylene-diene monomer (EPDM)/polypropylene (PP) thermoplastic vulcanizates (TPVs) are actually agglomerates of rubber nanoparticles. In this study, based on this new understanding of the microstructure of TPV, we further revealed the microstructure-properties relationship of EPDM/PP TPV during dynamic vulcanization, especially the effect of the size of rubber nanoparticle agglomerates (d(n)), the thicknesses of PP ligaments (ID(poly)) and the rubber network on the properties of EPDM/PP TPV. We were able to simultaneously obtain a high tensile strength, elongation at break, elastic modulus, and elasticity for the EPDM/PP TPV by the achievement of a smaller d(n), a thinner ID(poly) and a denser rubber network. Interestingly, the effect of d(n) and ID(poly) on the elastic modulus of EPDM/PP TPV composed of rubber nanoparticle agglomerates is different from that of EPDM/PP TPVs composed of rubber microparticles reported previously. The deformation behavior of the TPVs during stretching was studied to understand the mechanism for the achievement of good mechanical properties. Interestingly, the rubber nanoparticle agglomerates are oriented along the tensile direction during stretching. The TPV samples with smaller and more numerous rubber nanoparticle agglomerates can slow down the development of voids and cracks more effectively, thus leading to increase in tensile strength and elongation at break of the EPDM/PP TPV.
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spelling pubmed-64323842019-04-02 Effect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization Wu, Hanguang Tian, Ming Zhang, Liqun Tian, Hongchi Wu, Youping Ning, Nanying Hu, Guo-Hua Polymers (Basel) Article We previously reported that the dispersed rubber microparticles in ethylene-propylene-diene monomer (EPDM)/polypropylene (PP) thermoplastic vulcanizates (TPVs) are actually agglomerates of rubber nanoparticles. In this study, based on this new understanding of the microstructure of TPV, we further revealed the microstructure-properties relationship of EPDM/PP TPV during dynamic vulcanization, especially the effect of the size of rubber nanoparticle agglomerates (d(n)), the thicknesses of PP ligaments (ID(poly)) and the rubber network on the properties of EPDM/PP TPV. We were able to simultaneously obtain a high tensile strength, elongation at break, elastic modulus, and elasticity for the EPDM/PP TPV by the achievement of a smaller d(n), a thinner ID(poly) and a denser rubber network. Interestingly, the effect of d(n) and ID(poly) on the elastic modulus of EPDM/PP TPV composed of rubber nanoparticle agglomerates is different from that of EPDM/PP TPVs composed of rubber microparticles reported previously. The deformation behavior of the TPVs during stretching was studied to understand the mechanism for the achievement of good mechanical properties. Interestingly, the rubber nanoparticle agglomerates are oriented along the tensile direction during stretching. The TPV samples with smaller and more numerous rubber nanoparticle agglomerates can slow down the development of voids and cracks more effectively, thus leading to increase in tensile strength and elongation at break of the EPDM/PP TPV. MDPI 2016-04-15 /pmc/articles/PMC6432384/ /pubmed/30979235 http://dx.doi.org/10.3390/polym8040127 Text en © 2016 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wu, Hanguang
Tian, Ming
Zhang, Liqun
Tian, Hongchi
Wu, Youping
Ning, Nanying
Hu, Guo-Hua
Effect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization
title Effect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization
title_full Effect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization
title_fullStr Effect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization
title_full_unstemmed Effect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization
title_short Effect of Rubber Nanoparticle Agglomeration on Properties of Thermoplastic Vulcanizates during Dynamic Vulcanization
title_sort effect of rubber nanoparticle agglomeration on properties of thermoplastic vulcanizates during dynamic vulcanization
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6432384/
https://www.ncbi.nlm.nih.gov/pubmed/30979235
http://dx.doi.org/10.3390/polym8040127
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