Volume 12, Issue 2, 2003

Thermoelastic Behaviour of Synthetic Rubber/ Organoclay Nanocomposites at Low Elongations

V.P. Privalko1, S.M. Ponomarenko1, E.G. Privalko1, F. Schon2, W. Gronski2

1Institute of Macromolecular Chemistry, National Academy of Sciences of Ukraine,
Kharkiv Chaussee 48, 02160 Kyiv, UKRAINE
2Institut fur Makromolekulare Chemie, Universitat Freiburg, Stefan-Meier-Str. 31,
D-79104 Freiburg, GERMANY

(Received 7/02; accepted 4/03)

ABSTRACT

Melt-compounded nanocomposites of synthetic styrene-co-butadiene rubber (BUNA SL18) and clay particles pretreated with three different modifiers were characterised by stretching calorimetry in the range of relative elongations λ < 1.3. In contrast to the pristine rubber, all nanocomposites exhibited irreversibility of both mechanical work and heat effects in stretching/contraction cycles at fairly low elongations. The observed irreversibility was considered as evidence for chain slippage effects.

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