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%0 Thesis %A Klie, Benjamin %T Bewertung der stofflichen Homogenität von Kautschukmischungen durch Einsatz der Laser Induced Breakdown Spectroscopy (LIBS) %I Rheinisch-Westfälische Technische Hochschule Aachen %V Dissertation %C Aachen %M RWTH-2016-06963 %P 1 Online-Ressource (219 Seiten) : Illustrationen, Diagramme %D 2016 %Z Veröffentlicht auf dem Publikationsserver der RWTH Aachen University %Z Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2016 %X A key sector of the rubber processing industry deals with improving mixing processes in silica/silane technology and with the discontinuous batch production of the corresponding rubber compounds in the rubber internal mixer compounding process. To achieve the desired material properties in the respective end product, both producers of technical rubber products and tire makers are in need of a mixing process that is effective (in terms of both dispersion and distributive mixing efficiency). Major differences in polarity between nonpolar rubber and highly polar silica impede the incorporation and dispersion of silica, the active filler. This effect also influences the quality of distributive mixing of other compound ingredients and thus the compound homogeneity that is to be attained.Whereas the reflected-light microscopy method, with image processing, has been tested and fully developed for industrial grade use in analyzing filler particle macrodispersion, employment of Laser Induced Breakdown Spectroscopy (LIBS) remains relatively unknown in rubber processing as a means of analyzing distributive mixing efficiency via determination of the homogeneous distribution of a specific marker across a batch volume.The results of this research activity have shown that under atmospheric conditions (with no vacuum), LIBS is a suitable method for analyzing the distributive mixing quality of components within a rubber compound batch. The method can be applied both in compounds free of carbon black fillers and in those containing carbon black fillers. Thanks to its very short measurement time (here: approx. 40 s for analysis of a roughly postage-stamp-sized specimen surface), it yields a statistically representative statement as to the distributive quality of a marker (like zinc) in the used compound. %F PUB:(DE-HGF)11 %9 Dissertation / PhD Thesis %U https://publications.rwth-aachen.de/record/668713