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Evolution of morphology and of chemical conversion along the screw in a corotating twin-screw extruder

✍ Scribed by A. V. Machado; J. A. Covas; M. Van Duin

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
298 KB
Volume
71
Category
Article
ISSN
0021-8995

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✦ Synopsis

A new sampling device is used to perform near-real-time investigations of physical and chemical processes occurring inside a laboratory twin-screw extruder. Polyamide-6 -ethylene propylene rubber (PA-6 -EPM) blending and styrene-maleic anhydride (SMA) imidation experiments are reported in terms of morphology development and evolution of the chemical conversion along the extruder, respectively. Comparison of the results obtained using this new technique with those of classical screwpulling experiments evidenced the potential erroneous conclusions than can be drawn from the latter.

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## Abstract This article reports an experimental and theoretical study of the peroxide‐induced degradation of polypropylene in a corotating twin‐screw extruder. Experiments were performed with different peroxide concentrations and different operating conditions. The evolution of the chemical reacti