Online measured electrical conductance
The properties of filler containing polymer materials depend in a high manner on dipersion and distribution of the filler in the polymer matrix. The characterization of macro- and micro-dispersion usually is performed on the final product. For carbon black containing rubber compounds a method on the basis of online measured electrical conductance is developed, which enables the analysis of dispersion and distribution of carbon black during the mixing process in the internal mixer. Correlations between online conductance, offline measured electrical conductivity and mechanical properties have been found.
The findings for singular rubber compounds could be transfered to binary rubber blends and dynamic vulcanizates and to the continuous processing in extruder.
The method is applicable in carbon nanotubes and organoclay containing systems.
Online measured electrical conductance and dispersion index measured by optical microscopy and calculated for samples taken at different mixing times for natural rubber with 50 phr N 220
Related publications:
H.H. Le, G. Kasaliwal, S. Ilisch, H.-J. Radusch: Online measured electrical conductance - In-process characterization of the dispersion behavior of carbon nanotubes in rubber compounds, Kautschuk Gummi Kunststoffe 62 (2009) 326-333
Z. Ali, H.H. Le, S. Ilisch, K. Busse, H.-J. Radusch: Nanoclay exfoliation in rubber compounds characterized by online measurements of electrical conductance, Journal of Applied Polymer Science 113 (2009) 667-677
H.H. Le, S. Ilisch, H. Steinberger, H.-J. Radusch: Macro- and microdispersion of carbon black in liquid silicone rubbers, Plastics, Rubber Composites: Macromolecular Engineering 37 (2008) 367-375
H.H. Le, S. Ilisch, A. Wutzler, H.-J. Radusch
Im Extruder und Kneter online gemessener elektrischer Leitwert - Messgröße für die Überwachung der Produkteigenschaften rußgefüllter Polymerwerkstoffe
Kautsch. Gummi Kunstst. 60 (2007) 295-302
H.H. Le, Z. Qamer, S. Ilisch, H.-J. Radusch
Carbon black distribution in the components of rubber blends monitored by online measured electrical conductance
Rubber Chem. Technol. 79 (2006) 621-630
H.H. Le, M. Tiwari, S. Ilisch, H.-J. Radusch
Online method for characterization of the homogeneity of rubber compounds filled with non-conductive carbon black
Rubber Chem. Technol. 79 (2006) 610-620
Le, H.H.; Tiwari, M.; Ilisch, S.: Radusch, H.-J.
Elastomeric and electrically conductive materials on the basis of thermoplastic elastomers and their controlled manufacturing
Plastics Rubber Composites 35 (2006) 10, 410-417
Le, H.H.; Tiwari, M.; Ilisch, S.; Radusch, H.-J.
Effect of molecular structure on carbon black dispersion in rubber compounds
Kautschuk Gummi Kunststoffe 58 (2005) 11, 575-580
Le, H.H.; Prodanova, I.; Ilisch, S.; Radusch, H.-J.
Online Electrical Conductivity as a Measure to Characterize the Carbon Black Dispersion in Oil Containing Rubber Compounds with a Different Polarity of the Rubber
Rubber Chem. Technol. 77 (2004) 11/12, 815-830
Le, H. H.; Ilisch, S.; Prodanova, I.; Radusch, H.-J.
Rußdispersion in Kautschukmischungen in Anwesenheit von Weichmacherölen. Nutzung der online gemessenen elektrischen Leitfähigkeit zur Charakterisierung rheologischer und thermodynamischer Effekte
Kautschuk Gummi Kunststoffe 57 (2004) 7/8, 355-362
Le, H. H.; Ilisch, S.; Jakob, B.; Radusch, H.-J.
Online Characterization of the Effect of Mixing Parameters on Carbon Black Dispersion in Rubber Compounds Using Electrical Conductivity
Rubber Chem. Technol. 77 (2004) 1, 147-160
Le, H.H.; Ilisch, S.; Jakob, B.; Radusch, H.-J
Online Charakterisierung der Füllstoffdispersion rußgefüllter Kautschuke während des Mischprozesses unter Nutzung der elektrischen Leitfähigkeit
Kautschuk Gummi Kunststoffe 56 (2003) 388-395