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Rheologica Acta

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07.12.2017 | Original Contribution

Application of the GIMP software in the analysis of birefringence images obtained in a multipass rheometer

verfasst von: André M. Castro, Juliana O. Pereira, Thais M. Farias, Argimiro R. Secchi, Nilo Sérgio M. Cardozo

Erschienen in: Rheologica Acta | Ausgabe 2/2018

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Abstract

Flow-induced birefringence is a technique with numerous potential applications in polymers, because the bright and dark fringe patterns of the birefringence images can be related to principal stress difference (PSD) profile along the flow centerline. In this work, we developed an easy-to-use methodology for birefringence image processing using the GIMP open-source software. In order to illustrate its application, images obtained in previous work during the flow of two grades of general purpose polystyrene through the slit-die geometry in the multipass rheometer MPR4, located at the University of Cambridge, UK, were reprocessed. The results showed that the PSD module profile along the flow centerline obtained with the proposed methodology is more accurate than the manual technique and is obtained with shorter processing time.

Vorheriger Artikel Formulation, characterisation and flexographic printing of novel Boger fluids to assess the effects of ink elasticity on print uniformity

Nächster Artikel A numerical study on nonlinear dynamics of three-dimensional time-depended viscoelastic Taylor-Couette flow

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Titel: Application of the GIMP software in the analysis of birefringence images obtained in a multipass rheometer
verfasst von: André M. Castro
Juliana O. Pereira
Thais M. Farias
Argimiro R. Secchi
Nilo Sérgio M. Cardozo
Publikationsdatum: 07.12.2017
Verlag: Springer Berlin Heidelberg
Erschienen in: Rheologica Acta / Ausgabe 2/2018
Print ISSN: 0035-4511
Elektronische ISSN: 1435-1528
DOI: https://doi.org/10.1007/s00397-017-1063-7

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