Particles in model filled rubber: Dispersion and mechanical properties |
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Authors: | H Montes T Chaussée A Papon F Lequeux and L Guy |
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Institution: | 1.Physico-chimie des Polymères et Milieux Dispersés,ESPCI ParisTech,Paris Cedex 5,France;2.Rhodia Opérations,Collonges-au-Mont-d’Or,France |
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Abstract: | We have been able to design model filled rubbers with exactly the same chemical structure but different filler arrangements.
From these model systems, we show that the particle arrangement in the elastomeric matrix controls the strain softening at
small strain amplitude known as the Payne effect, as well as the elastic modulus dependence on the temperature. More precisely,
we observed that the Payne effect disappears and the elastic modulus only weakly depends on the temperature when the particles
are well separated. On the contrary, samples with the same interfacial physical chemistry but with aggregated particles show
large amplitudes of the Payne effect and their elastic modulus decreases significantly with the temperature. We discuss these
effects in terms of glassy bridge formation between filler particles. The observed effects provide evidence that glassy bridges
play a key role on the mechanical properties of filled rubbers. |
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