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@article{1642042,
author = {Kubena, Martin and Eliáš, Marek and Zajíčková, Lenka and Poduska, Jan and Kruml, Tomáš},
article_location = {LONDON},
article_number = {2019},
doi = {http://dx.doi.org/10.1155/2019/6598452},
keywords = {Electrical percolation},
language = {eng},
issn = {1687-8434},
journal = {Advances in Materials Science and Engineering},
title = {On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes},
url = {https://www.hindawi.com/journals/amse/2019/6598452/},
volume = {2019},
year = {2019}
}
TY - JOUR
ID - 1642042
AU - Kubena, Martin - Eliáš, Marek - Zajíčková, Lenka - Poduska, Jan - Kruml, Tomáš
PY - 2019
TI - On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes
JF - Advances in Materials Science and Engineering
VL - 2019
IS - 2019
SP - 1-8
EP - 1-8
PB - HINDAWI LTD
SN - 16878434
KW - Electrical percolation
UR - https://www.hindawi.com/journals/amse/2019/6598452/
L2 - https://www.hindawi.com/journals/amse/2019/6598452/
N2 - 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 (epsilon<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.
ER -
KUBENA, Martin, Marek ELIÁŠ, Lenka ZAJÍČKOVÁ, Jan PODUSKA a Tomáš KRUML. On the Tensile Tests of Polyurethane and Its Composites with Carbon Nanotubes. \textit{Advances in Materials Science and Engineering}. LONDON: HINDAWI LTD, 2019, roč.~2019, č.~2019, s.~1-8. ISSN~1687-8434. Dostupné z: https://dx.doi.org/10.1155/2019/6598452.
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