Large deformation in filled networks of different architecture and its interpretation in terms of the van der Waals network model

Abstract

Abstract:The first quasi-static stretch of the two limiting systems of filler loaded rubber have been investigated. One of them is found by filler to matrix contacts only, the other by crosslinking permanently the matrix. In this case filler-matrix contacts are made by adhesion. The experimental results were described in terms of an extended van der Waals approach. It is illuminated that different filler to matrix contact (permanent bonds or adhesion) lead to different deformation mechanism, substantially affecting the "reinforcement". Moreover, filler induced local "field-modifications" due to the boundary value problem can be understood with the Einstein-Smallwood approach independent of the kind of the filler to matrix contacts.

Direct observation of abrupt shape transition in ferrogels induced by nonuniform magnetic field

“…7 This takes into account the effect of finite chain extensibility of the network chains as well as the restricted fluctuation of junction points due to entanglements and colloidal filler particles. The van der Waals approach to cover the total region of strains is…”

“…͑3͒ cannot be used to fit the experimental data. Deviation from the Gaussian theory of rubber elasticity may be due to finite chain extensibility and entanglement effects [5][6][7] and often represented by the Mooney plot…”