A rheokinetic study of bulk free radical polymerization performed with a helical barrel rheometer

The Trommsdorff effect is a non‐linear autoacceleration phenomenon in bulk free radical polymerizations. It is undesired in processes on industrial scale, as is causes hot spots and erratic behavior. In this paper a rheokinetic investigation of the Trommsdorff effect is performed with a helical barr...

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Bibliographic Details
Published in:Polymer engineering and science 2004-01, Vol.44 (1), p.179-185
Main Authors: Cioffi, M., Ganzeveld, K. J., Hoffmann, A. C., Janssen, L. P. B. M.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Free radicals
Organic polymers
Physicochemistry of polymers
Polymerization
Polymers
Preparation, kinetics, thermodynamics, mechanism and catalysts
Rheology
Viscometers
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Summary:The Trommsdorff effect is a non‐linear autoacceleration phenomenon in bulk free radical polymerizations. It is undesired in processes on industrial scale, as is causes hot spots and erratic behavior. In this paper a rheokinetic investigation of the Trommsdorff effect is performed with a helical barrel rheometer. This rheometer can be considered a small‐scale model of large reactors, particularly extruders. The rheokinetic measurements show that the Trommsdorff effect can be reduced when the polymerization is performed at a high rotational velocity of the screw. This confirms a previous study performed with a cone and plate rheometer and is encouraging with a view to designing better‐controlled bulk free radical polymerization processes on industrial scale.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.20016