A Comparison between Rheological and Viscoelastic Properties of non-Filled and Fumed Silica Filled Polydimethylsiloxane (PDMS) at VariousCure States

The rheological and viscoelastic properties of cured and semi-cured silicone rubber were investigated using a Rubber Process Analyzer (RPA 2000). The semi-cured PDMS were prepared according to the maximum torque of fully cured samples. Rhgeological investigations indicated that the presence of fumed silica resulted in a large enhancement in properties. Minor changes in Power-law index were observed for silica filled PDMS samples compared to corresponding non-filled ones. Stress relaxation tests indicated that at a similar cure state, the reinforced PDMS offered an improved and more stable behavior

کلیدواژه ها:

rheology ، PDMS ، fumed silica ، stress relaxation