Choice of polymer samples geometry for measurement of elongational viscosity using ser universal testing platform

0342967 - ÚH 2011 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Filip, Petr - Švrčinová, Petra
Choice of polymer samples geometry for measurement of elongational viscosity using ser universal testing platform.
Engineering Mechanics 2010. Prague: Institute of Thermomechanics AS CR, v. v. i., 2010 - (Zolotarev, I.), Article no. 034. ISBN 978-80-87012-26-0.
[Engineering Mechanics 2010. Svratka (CZ), 10.05.2010-13.05.2010]
Grant CEP: GA ČR GA103/08/1307
Výzkumný záměr: CEZ:AV0Z20600510
Klíčová slova: uniaxial elongational flow * planar flow * polymer melts * uniaxial elongational viscosity * SER Universal Testing Platform * LDPE
Kód oboru RIV: BK - Mechanika tekutin

Generation of purely uniaxial elongational flow of polymer melts is very uneasy problem. It seems that each hitherto developed device for measurement of uniaxial elongational viscosity also produces - to some extent - a planar flow. During the last period there has been questioned - based on this reasoning - the applicability of a SER Universal Testing Platform and was recommended the range of rectangular dimensions of polymer samples for which measurements of uniaxial elongational viscosity is possible to take into account. The aim of this contribution consists in verification of invariantness of uniaxial elongational measurements using the SER Universal Testing Platform with respect to the dimensions of polymer samples applied. There is shown that for sufficiently broad region of admissible widths and thicknesses the results are identical. For these measurements there was used LDPE Escorene (Exxon, U.S.A.).
Trvalý link: http://hdl.handle.net/11104/0185563