Structure and Thermoelasticity of Synthetic Rubber/Silica Composites

Autor:	Wolfram Gronski, Valery P. Privalko, Eleonora G. Privalko, S. M. Ponomarenko, F. Schön
Rok vydání:	2004
Předmět:	Nanocomposite Materials science Polymers and Plastics Nanoparticle General Chemistry Calorimetry Condensed Matter Physics Synthetic rubber Natural rubber Heat generation visual_art Materials Chemistry visual_art.visual_art_medium Stress relaxation Organoclay Composite material
Zdroj:	Journal of Macromolecular Science, Part B. 43:1231-1242
ISSN:	1525-609X 0022-2348
DOI:	10.1081/mb-200036793
Popis:	Melt‐compounded composites of synthetic styrene‐co‐butadiene rubber (BUNA SL18) and silica particles (Silica VN3, Degussa) were characterized by wide‐angle and small‐angle x‐ray diffraction and stretching calorimetry. At low elongations, silica particles provided a considerably weaker reinforcement effect of the rubber matrix when compared to organoclay nanoparticles. The overall thermoelastic behavior of both the rubber/silica composites and the rubber/organoclay nanocomposites could be quantitatively accounted for by a model that explicitly assumed the contributions of local strain amplification for the rubber matrix and of successive decay of a spatial network of filler particles with increasing strain, generating the exothermal effects of external friction between particles. Significantly more intensive heat generation, concomitant to higher amplitudes of stress relaxation in the rubber/silica composites at high uniaxial extensions as compared to the rubber/organoclay nanocomposites, was rega...
Databáze:	OpenAIRE
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