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Micromechanical properties of UHMWPE´s with different molecular weights
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SYSNO ASEP 0495555 Document Type C - Proceedings Paper (int. conf.) R&D Document Type The record was not marked in the RIV Title Micromechanical properties of UHMWPE´s with different molecular weights Author(s) Šlouf, Miroslav (UMCH-V) RID, ORCID
Krejčíková, Sabina (UMCH-V)
Hromádková, Jiřina (UMCH-V) RID
Vlková, Helena (UMCH-V)Source Title Key Engineering Materials. Vol. 784. - Zurich : Trans Tech Publications Inc., 2018 / Lofaj F. ; Zubko P. - ISBN 1662-9795 Pages s. 33-37 Number of pages 5 s. Action Conference on Local Mechanical Properties /13./ Event date 06.11.2017 - 08.11.2017 VEvent location Košice Country SK - Slovakia Event type WRD Language eng - English Country CH - Switzerland Keywords vickers microhardness ; microindentation hardness testing ; semicrystalline polymers Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects NV15-31269A GA MZd - Ministry of Health (MZ) TE01020118 GA TA ČR - Technology Agency of the Czech Republic (TA ČR) LO1507 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support UMCH-V - RVO:61389013 DOI 10.4028/www.scientific.net/KEM.784.33 Annotation Ultrahigh molecular weight polyethylene (UHMWPE) is used as a key component of total joint replacements (TJR) and its mechanical performance is one of the factors influencing TJR lifetime. Micromechanical properties of three model UHMWPE samples with different molecular weights were evaluated from both non-instrumented and instrumented microindentation hardness testing. The properties were correlated with molecular and supermolecular structure of the samples. We have demonstrated that molecular weight influenced the final micromechanical properties mostly indirectly - it changed the overall crystallinity, which strongly correlated with microhardness, indentation modulus, and also with the elastic part of the indentation work. Only microcreep was influenced predominantly by amorphous phase, in which the higher molecular weight resulted in higher amount of entanglements and slightly higher creep resistance. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2019 Electronic address https://www.scientific.net/KEM.784.33
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