A new device for in-line colorimetric quantification of polypropylene degradation under multiple extrusions

An in-line colorimeter that is able to quantify color changes in real time during extrusion was developed and validated. It is composed of LEDs emitting at three different wavelengths and a photocell that measures the intensity of the light transmitted through the polymer melt flow. The colorimeter...

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Bibliographic Details
Published in:Polymer testing 2015-02, Vol.41, p.117-123
Main Authors: Hamester, Letícia Sausen, Muñoz, Pablo Andrés Riveros, Canevarolo, Sebastião Vicente
Format: Article
Language:English
Subjects:
Colorimetry
Extrusion
In-line measurement
Optical detection
Thermo-mechanical degradation
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Description
Summary:An in-line colorimeter that is able to quantify color changes in real time during extrusion was developed and validated. It is composed of LEDs emitting at three different wavelengths and a photocell that measures the intensity of the light transmitted through the polymer melt flow. The colorimeter was validated at the bench by employing colored aqueous solutions and in-line during the extrusion of a colored polypropylene. Furthermore, it was used to in-line quantify the color changes in a polypropylene as generated over multiple extrusions due to thermo-mechanical degradation. The technique was proved to be fast and suitable to measure color changes in real time during extrusion.
ISSN:0142-9418
1873-2348
DOI:10.1016/j.polymertesting.2014.11.001