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Breakup of silica agglomerates in corotating twin screw extruder Modeling and experiment

October 19, 2015
Extensive experimental studies on silica agglomerate breakup during compounding with polymer melts of varied viscosities and polarities on a modular corotating twin-screw extruder were conducted. In order to avoid a subjectivity of the total result, because of small size particles involved, silica agglomerates were characterized by measuring their mass average ideals. Increasing the screw rate, melt viscosity, and silica concentration were found to improve the silica agglomerate breakup. The effect of the parameters on agglomerate mixer extruder breakup was rated as follows: silica focus > polymer viscosity

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