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A novel online rheometer for elongational viscosity measurement of polymer melts.

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Title: A novel online rheometer for elongational viscosity measurement of polymer melts.
Authors: Köpplmayr, Thomas1,2 thomas.koepplmayr@profactor.at, Luger, Hans-Jürgen1, Burzic, Ivana1,3, Battisti, Markus G.4,5, Perko, Leonhard4,6, Friesenbichler, Walter4, Miethlinger, Jürgen1
Source: Polymer Testing. Apr2016, Vol. 50, p208-215. 8p.
Subjects: Rheometers, Measurement of viscosity, Polymer melting, Extrusion process, Shear (Mechanics), Pressure transducers
Abstract: This paper focuses on the measurement of elongational viscosity of polymer melts and filled compounds using a novel online rheometer. We developed a device with two slit sections and a hyperbolic contraction part in between, which allows for constant monitoring of both shear and elongational viscosity during an extrusion process. Due to the favorable design of the hyperbolic contraction, pressure transducers can be incorporated directly into the flow channels, which prevents material accumulation in pressure holes. The results of a pipe-grade polypropylene random copolymer melt are in good accordance with Sentmanat Extensional Rheometer (SER) measurements, in contrast to other methods such as Cogswell analysis of High Pressure Capillary Rheometer (HPCR) data or measurement on a wedge-shaped slit die, which fail to predict the true non-Newtonian behavior of the melt. In addition, we present the results of a polypropylene homopolymer intended for thermoformed packaging applications, a glass fiber and a talc compound, which could all be successfully characterized using our rheometer. [ABSTRACT FROM AUTHOR]
Copyright of Polymer Testing is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 113478718
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: A novel online rheometer for elongational viscosity measurement of polymer melts.
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  Data: <searchLink fieldCode="JN" term="%22Polymer+Testing%22">Polymer Testing</searchLink>. Apr2016, Vol. 50, p208-215. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Rheometers%22">Rheometers</searchLink><br /><searchLink fieldCode="DE" term="%22Measurement+of+viscosity%22">Measurement of viscosity</searchLink><br /><searchLink fieldCode="DE" term="%22Polymer+melting%22">Polymer melting</searchLink><br /><searchLink fieldCode="DE" term="%22Extrusion+process%22">Extrusion process</searchLink><br /><searchLink fieldCode="DE" term="%22Shear+%28Mechanics%29%22">Shear (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Pressure+transducers%22">Pressure transducers</searchLink>
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  Data: This paper focuses on the measurement of elongational viscosity of polymer melts and filled compounds using a novel online rheometer. We developed a device with two slit sections and a hyperbolic contraction part in between, which allows for constant monitoring of both shear and elongational viscosity during an extrusion process. Due to the favorable design of the hyperbolic contraction, pressure transducers can be incorporated directly into the flow channels, which prevents material accumulation in pressure holes. The results of a pipe-grade polypropylene random copolymer melt are in good accordance with Sentmanat Extensional Rheometer (SER) measurements, in contrast to other methods such as Cogswell analysis of High Pressure Capillary Rheometer (HPCR) data or measurement on a wedge-shaped slit die, which fail to predict the true non-Newtonian behavior of the melt. In addition, we present the results of a polypropylene homopolymer intended for thermoformed packaging applications, a glass fiber and a talc compound, which could all be successfully characterized using our rheometer. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Polymer Testing is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.polymertesting.2016.01.012
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 208
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      – SubjectFull: Rheometers
        Type: general
      – SubjectFull: Measurement of viscosity
        Type: general
      – SubjectFull: Polymer melting
        Type: general
      – SubjectFull: Extrusion process
        Type: general
      – SubjectFull: Shear (Mechanics)
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      – SubjectFull: Pressure transducers
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      – TitleFull: A novel online rheometer for elongational viscosity measurement of polymer melts.
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              Text: Apr2016
              Type: published
              Y: 2016
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              Value: 50
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