MEASUREMENT OF DYNAMIC PROPERTIES OF SILICONE RUBBERS

Abstract

The application of silicone rubbers is not new in precision engineering and in the medical practice. However, the role of them has increased lately, so they are often applied as structural materials. The load of the mechanical constructions is often of dynamical type. To analyse exactly the constructions we have to know the dynamic behaviour of the material of the construction. The behaviour of the analysed material, of the silicone rubbers can be written only with complex quantities. The dynamic characteristic data depend on the frequency and temperature. This article presents two methods to define the dynamic properties of silicone rubbers. Firstly the classical dynamic mechanical analysis (DMA) is demonstrated then a direct measurement is shown to determine the frequency-dependent dynamical characteristic data. As a conclusion it can be proposed that the direct measurement gives the more reliable result in case of silicone rubbers.