On the (ir)reproducibility of measurements of elongational viscosity using an SER universal testing platform

0394846 - ÚH 2014 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Filip, Petr - Pivokonský, Radek
On the (ir)reproducibility of measurements of elongational viscosity using an SER universal testing platform.
Novel Trends in Rheology V. AIP Conference Proceedings 1526. New York: AIP Publishing, 2013 - (Zatloukal, M.), s. 209-215. ISBN 978-0-7354-1151-7. ISSN 0094-243X.
[Novel Trends in Rheology /5./. Zlín (CZ), 30.07.2013-31.07.2013]
Grant CEP: GA ČR GA103/09/2066
Institucionální podpora: RVO:67985874
Klíčová slova: elangational viscosity * SER Universal Testing Platform * SER * filament stretching rheometer * polymer melts * extensional viscosity * rheology
Kód oboru RIV: BK - Mechanika tekutin

An SER Universal Testing Platform represents a widely used instrument determined for the measurement of elongational viscosity of various materials. Apart from an initial pre-selection of materials and an a priori range of extension strain for which this method can be applied, there is a series of other factors substantially influencing quality and reproducibility of the obtained results. They are prevailingly connected with the preparation of the samples and their fixing to the elongation rheometer. Among them it is possible to name an unevenness of sample thickness, appearance of air bubbles within the material studied, slant of fixed sample with respect to the rheometer drums axes. The aim of this contribution is to show the reasons of possible bad reproducibility of elongation measurements and visually determine the ranges of selected parameters within which the measurements are acceptable.
Trvalý link: http://hdl.handle.net/11104/0223017