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Measurement of elongational viscosity of polymer melts using SER Universal Testing Platform

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    0376037 - ÚH 2013 RIV DE eng J - Journal Article
    Filip, Petr - Švrčinová, Petra
    Measurement of elongational viscosity of polymer melts using SER Universal Testing Platform.
    Applied Rheology. Roč. 22, č. 1 (2012), s. 14776. ISSN 1430-6395. E-ISSN 1617-8106
    R&D Projects: GA ČR GA103/08/1307; GA ČR GA103/09/2066
    Institutional research plan: CEZ:AV0Z20600510
    Keywords : elongational viscosity * SER Universal Testing Platform * polymer melts * LDPE
    Subject RIV: BK - Fluid Dynamics
    Impact factor: 1.226, year: 2012
    http://www.ar.ethz.ch/TMPPDF/23074299892.48/ApplRheol_22_14776.pdf

    The measurement of elongational viscosity still evokes a series of problems in comparison with the relatively well-established measurement of shear viscosity. Recently new techniques have appeared enabling measurement of elongational viscosity with the samples for which the aspect ratios of their geometrical shapes (i.e. length vs. width (diameter)) can attain moderate values, i.e. not necessarily of a longitudinal character as in the case of earlier techniques. The aim of this contribution is to experimentally demonstrate the invariantness of transient uniaxial elongational viscosity measured with respect to a rectangular shape and thickness of LDPE samples using a SER Universal Testing Platform fixed in an Anton Paar MCR 501 host system. The width of the samples was varied within the range 2.1-12.7 mm and thickness altered within 0.1-1 mm. An advantage of fixing polymer samples directly to both drums (if possible) over the application of clamps is documented.
    Permanent Link: http://hdl.handle.net/11104/0006939

     
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    Filip_Švrčinová_Measurement of elongational viscosity_2012.pdf0997 KBAuthor´s preprintrequire
     
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