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Macro-, micro- and nanomechanical characterization of crosslinked polymers with very broad range of mechanical properties
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SYSNO ASEP 0536180 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Macro-, micro- and nanomechanical characterization of crosslinked polymers with very broad range of mechanical properties Author(s) Šlouf, Miroslav (UMCH-V) RID, ORCID
Strachota, Beata (UMCH-V) RID
Strachota, Adam (UMCH-V) RID, ORCID
Gajdošová, Veronika (UMCH-V) RID, ORCID
Bertschova, V. (CH)
Nohava, J. (CH)Article number 2951 Source Title Polymers. - : MDPI
Roč. 12, č. 12 (2020), s. 1-26Number of pages 26 s. Language eng - English Country CH - Switzerland Keywords microindentation ; nanoindentation ; depth-sensing indentation Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects TN01000008 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) GA19-04925S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UMCH-V - RVO:61389013 UT WOS 000602425800001 EID SCOPUS 85097640881 DOI 10.3390/polym12122951 Annotation This work is focused on the comparison of macro-, micro- and nanomechanical properties of a series of eleven highly homogeneous and chemically very similar polymer networks, consisting of diglycidyl ether of bisphenol A cured with diamine terminated polypropylene oxide. The main objective was to correlate the mechanical properties at multiple length scales, while using very well-defined polymeric materials. By means of synthesis parameters, the glass transition temperature (Tg) of the polymer networks was deliberately varied in a broad range and, as a result, the samples changed their mechanical behavior from very hard and stiff (elastic moduli 4 GPa), through semi-hard and ductile, to very soft and elastic (elastic moduli 0.006 GPa). The mechanical properties were characterized in macroscale (dynamic mechanical analysis, DMA), microscale (quasi-static microindentation hardness testing, MHI) and nanoscale (quasi-static and dynamic nanoindentation hardness testing, NHI). The stiffness-related properties (i.e., storage moduli, indentation moduli and indentation hardness at all length scales) showed strong and statistically significant mutual correlations (all Pearson′s correlation coefficients r > 0.9 and corresponding p-values < 0.001). Moreover, the relations among the stiffness-related properties were approximately linear, in agreement with the theoretical prediction. The viscosity-related properties (i.e., loss moduli, damping factors, indentation creep and elastic work of indentation at all length scales) reflected the stiff-ductile-elastic transitions. The fact that the macro-, micro- and nanomechanical properties exhibited the same trends and similar values indicated that not only dynamic, but also quasi-static indentation can be employed as an alternative to well-established DMA characterization of polymer networks. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2021 Electronic address https://www.mdpi.com/2073-4360/12/12/2951
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