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Morphology and Viscoelastic Behaviour of a Silica Filled Styrene/Butadiene Random Copolymer

✍ Scribed by Lucia Conzatti; Giovanna Costa; Maila Castellano; Antonio Turturro; Fabio Michele Negroni; Jean François Gérard

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
311 KB
Volume
293
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

An investigation into styrene‐butadiene rubber and styrene‐butadiene rubber/butadiene rubber composites was conducted, aimed at investigating the influence of surface modification of silica on polymer‐filler interactions. Two silanes, bis‐triethoxysilylpropyltetrasulfane and octadecyltriethoxysilane, were used as surface modifiers. A morphological investigation by transmission electron microscopy and automated image analysis provided a quantitative evaluation of the filler distribution in the rubber matrix by using morphometric descriptors, such as projected area, perimeter and area/perimeter ratio. The better dispersion of the surface‐modified silica nicely relates with the improved dynamic‐mechanical and tensile properties and accounts for the higher critical concentration necessary to the formation of the secondary network, thus confirming that the surface modification reduces filler‐filler and enhances polymer‐filler interactions.

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