Comparison and evaluation of different analytical methods to predict the in-rubber dispersibility of silica

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The aim of the present investigation was to find a correlation between one single analytical parameter of precipitated silica and its in-rubber dispersibility. Therefore, 25 different types of silica with a variety of analytical parameters and dosage forms were investigated by means of standard analytical methods (CTAB, BET, DOA, pH and moisture content) as well as t*wo new methods, the sedimentation test and the in-situ cluster fragmentation. Moreover, all types of silica *were mixed inside a typical Green Tire formulation filled with 80 phr of silica. The macro-dispersion quality was evaluated by means of two dispersion measurement systems, the Topography where the surface roughness of a rubber sample is scanned mechanically by a probe and the Dispertester where the sample is investigated by an optical light microscope. No significant linear correlation between the standard analytical parameter and the macro-dispersion quality could be found whereas the sedimentation method and in-situ cluster fragmentation provides promising approaches. However, it was not possible to directly predict the in-rubber dispersibility of silica by means of one single analytical parameter with a very high correlation coefficient. Finally, different aspects which limit the general approach were discussed. Taking all these facts into account it becomes obvious that a linear correlation of one single analytical parameter with the dispersion quality cannot be found.

Original languageEnglish
Pages (from-to)25-34
Number of pages10
JournalKGK Kautschuk Gummi Kunststoffe
Volume72
Issue number5
Publication statusPublished - 1 Jan 2019

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Rubber
Silicon Dioxide
Silica
Sedimentation
Macros
Dosage Forms
Tires
Topography
Microscopes
Moisture
Surface roughness

Cite this

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title = "Comparison and evaluation of different analytical methods to predict the in-rubber dispersibility of silica",
abstract = "The aim of the present investigation was to find a correlation between one single analytical parameter of precipitated silica and its in-rubber dispersibility. Therefore, 25 different types of silica with a variety of analytical parameters and dosage forms were investigated by means of standard analytical methods (CTAB, BET, DOA, pH and moisture content) as well as t*wo new methods, the sedimentation test and the in-situ cluster fragmentation. Moreover, all types of silica *were mixed inside a typical Green Tire formulation filled with 80 phr of silica. The macro-dispersion quality was evaluated by means of two dispersion measurement systems, the Topography where the surface roughness of a rubber sample is scanned mechanically by a probe and the Dispertester where the sample is investigated by an optical light microscope. No significant linear correlation between the standard analytical parameter and the macro-dispersion quality could be found whereas the sedimentation method and in-situ cluster fragmentation provides promising approaches. However, it was not possible to directly predict the in-rubber dispersibility of silica by means of one single analytical parameter with a very high correlation coefficient. Finally, different aspects which limit the general approach were discussed. Taking all these facts into account it becomes obvious that a linear correlation of one single analytical parameter with the dispersion quality cannot be found.",
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Comparison and evaluation of different analytical methods to predict the in-rubber dispersibility of silica. / Grunert, Fabian; Dierkes, Wilma K.; Blume, Anke; Wehmeier, André.

In: KGK Kautschuk Gummi Kunststoffe, Vol. 72, No. 5, 01.01.2019, p. 25-34.

Research output: Contribution to journalArticleAcademicpeer-review

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