A rheological method for selecting nano-kaolin powder as filler in SBR rubber--颗粒学报PARTICUOLOGY

Lagazzo, A., Lenzi, S., Botter, R., Cirillo, P., Demicheli, F., & Beruto, D. T. (2010). A rheological method for selecting nano-kaolin powder as filler in SBR rubber. Particuology, 8(3), 245-250. https://doi.org/10.1016/j.partic.2010.03.014

A rheological method for selecting nano-kaolin powder as filler in SBR rubber

Alberto Lagazzo ^a, Sergio Lenzi ^b, Rodolfo Botter ^a, Paolo Cirillo ^a, Fabrizio Demicheli ^b, Dario T. Beruto ^a *

a Department of Civil, Environmental and Architectural Engineering (DICAT), University of Genoa, P.le Kennedy (Fiera del Mare), Pad. D, 16129 Genoa, Italy
b Artigo S.p.A., loc. Carpeneto, 17014 Cairo Montenotte (SV), Italy

10.1016/j.partic.2010.03.014

Volume 8, Issue 3, June 2010, Pages 245-250

Received 25 July 2009, Revised 15 October 2009, Accepted 9 March 2010, Available online 4 April 2010.

E-mail: dabe@unige.it

Highlights

Abstract

This paper shows that the stiffness of styrene–butadiene solid rubber with added kaolin powder is related to the yield stress of kaolin dispersion in liquid polybutadiene rubber up to the percolation threshold. For five kinds of kaolin powder, the value of τ° spans the range of 100–430 Pa, while the corresponding compressive elastic constant of SBR varies from 12 to 21 MPa. A relationship between τ° and is proposed. Critical examination of these data infers that kaolin powder dispersed in solid rubber matrix acts as an additive which decreases the random movement of the polybutadiene chains. Consequently, dispersions of nano-particles in liquid and in solid SBR are considered to be related, thus leading to a rheological method for selecting nano-particles as fillers in solid SBR.

Graphical abstract

Keywords

Yield stress; Kaolin; Filler dispersion; Stiffness; Styrene–butadiene rubber (SBR); Liquid polybutadiene; Rheology

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