Experimental separation of the onset of slip and sharkskin melt instabilities during the extrusion of silica‑filled, styrene–butadiene rubber compounds
[en] The flow curves of polymers often reveal the onset of melt instabilities such as sharkskin, stick–slip, or gross melt fracture, in order of increasing shear rates. The focus of this work lies in the application of the Göttfert sharkskin option to the investigation of flow curves of styrene-butadiene rubber (SBR) compounds. The sharkskin option consists of highly sensitive pressure transducers located inside a slit die of a capillary rheometer. This tool allows the detection of in-situ pressure fluctuation characteristics of different melt instabilities. It is shown that the change of slope of the transition region in the flow curves is only linked to slip. Dynamic Mechanical Analysis (DMA) measurements furthermore show that the shear rate at which the change of slope can be observed shows the same temperature dependency as the viscous and elastic properties of the compounds.
Disciplines :
Physics
Author, co-author :
Gansen, Alex ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
Řehoř, Martin; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Computer Science and Communications Research Unit (CSC) > Institute of Computational Engineering
Sill, Clemens; Goodyear Innovation Center Luxembourg
Polińska, Patricia; Goodyear Innovation Center Luxembourg
Westermann, Stephan ; Luxembourg Institute of Science & Technology - LIST > Functional Polymers Unit
Dheur, Jean; Goodyear Innovation Center Luxembourg
Jack S., Hale; University of Luxembourg, 6 Avenue de La Fonte, 4362, Esch-Sur-Alzette, Luxembourg > Institute of Computational Engineering
Baller, Jörg ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS)
External co-authors :
no
Language :
English
Title :
Experimental separation of the onset of slip and sharkskin melt instabilities during the extrusion of silica‑filled, styrene–butadiene rubber compounds
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