On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes
Neat polyurethane (PU) specimens and composites of polyurethane with variable amounts of multiwalled carbon nanotubes (MWCNTs) were subjected to tensile tests, stress relaxation tests, and strain rate jumps. Since the already published data about the effect of carbon nanotubes addition to polymer ma...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/6598452 |
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| author | Martin Kuběna Marek Eliáš Lenka Zajíčková Jan Poduška Tomáš Kruml |
| author_facet | Martin Kuběna Marek Eliáš Lenka Zajíčková Jan Poduška Tomáš Kruml |
| author_sort | Martin Kuběna |
| collection | DOAJ |
| description | Neat polyurethane (PU) specimens and composites of polyurethane with variable amounts of multiwalled carbon nanotubes (MWCNTs) were subjected to tensile tests, stress relaxation tests, and strain rate jumps. Since the already published data about the effect of carbon nanotubes addition to polymer matrix are somewhat contradictory, great care was taken to understand the mechanical properties of neat PU specimens. The studies revealed that the tensile curves of neat PU are substantially influenced by several factors, such as strain rate, age, and thickness of the specimens. The addition of MWCNTs into the PU matrix had a negligible effect on the mechanical properties of composites at low strains (ε < 0.2). With increasing strain, the MWCNTs addition augmented the strength of the composites, and at high local deformations, as in the previously reported indentation experiments, the adhesion strength between functionalized carbon nanotubes and PU matrix substantially influences the mechanical behavior. The material response to the transient mechanical test showed an Arrhenius-type behavior and was analyzed accordingly. The magnitude of the activation volume scaled with the average length of the free segment of the polymer molecules. |
| format | Article |
| id | doaj-art-3f6b56b3866e4e77963a75a8955af35e |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-3f6b56b3866e4e77963a75a8955af35e2025-08-20T03:35:51ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/65984526598452On the Tensile Tests of Polyurethane and Its Composites with Carbon NanotubesMartin Kuběna0Marek Eliáš1Lenka Zajíčková2Jan Poduška3Tomáš Kruml4Institute of Physics of Materials, Žižkova 22, Brno, Czech RepublicCEITEC Masaryk University, Kamenice 5, Brno, Czech RepublicCEITEC Masaryk University, Kamenice 5, Brno, Czech RepublicInstitute of Physics of Materials, Žižkova 22, Brno, Czech RepublicCEITEC IPM, Žižkova 22, Brno, Czech RepublicNeat polyurethane (PU) specimens and composites of polyurethane with variable amounts of multiwalled carbon nanotubes (MWCNTs) were subjected to tensile tests, stress relaxation tests, and strain rate jumps. Since the already published data about the effect of carbon nanotubes addition to polymer matrix are somewhat contradictory, great care was taken to understand the mechanical properties of neat PU specimens. The studies revealed that the tensile curves of neat PU are substantially influenced by several factors, such as strain rate, age, and thickness of the specimens. The addition of MWCNTs into the PU matrix had a negligible effect on the mechanical properties of composites at low strains (ε < 0.2). With increasing strain, the MWCNTs addition augmented the strength of the composites, and at high local deformations, as in the previously reported indentation experiments, the adhesion strength between functionalized carbon nanotubes and PU matrix substantially influences the mechanical behavior. The material response to the transient mechanical test showed an Arrhenius-type behavior and was analyzed accordingly. The magnitude of the activation volume scaled with the average length of the free segment of the polymer molecules.http://dx.doi.org/10.1155/2019/6598452 |
| spellingShingle | Martin Kuběna Marek Eliáš Lenka Zajíčková Jan Poduška Tomáš Kruml On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes Advances in Materials Science and Engineering |
| title | On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes |
| title_full | On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes |
| title_fullStr | On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes |
| title_full_unstemmed | On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes |
| title_short | On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes |
| title_sort | on the tensile tests of polyurethane and its composites with carbon nanotubes |
| url | http://dx.doi.org/10.1155/2019/6598452 |
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