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R. Gałąź, T. Kiljański

Rheological properties of a silicone rubber evaluated at steady and oscillatory flow

Polimery 1995, No 9, 523

DOI: dx.doi.org/10.14314/polimery.1995.523


A general idea has been presented on how to study experimentally a silicone rubber and to carry out a numerical simulation of the flow in silicone rubber-filled buffers to predict the elasto-damping characteristics of the buffer at the design stage. The rheological properties of a silicone rubber Polastosil ABM, that strongly influence the elasto-damping characteristics of a buffer, were measured by using a Mechanical Spectrometer (Rheometrics) and a VDR Rheometer (Bohlin) at 20 to 60°C. The first normal stress difference and the shear stress were studied in relation to shear rate and of the Real and imaginary components of the complex modulus and viscosity in relation to frequency of oscillations. Oscillatory experiments were performed (i) by torsional oscillations between the cone and the plate and (ii) by means of eccentrically rotating discs. The two methods gave results consistent over the whole frequency range of 10-2—102 rad/s. The relationships obtained are typical of elastomers regardless of the significant quantitative differences occurring between the present and the former compositions of that type.

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