SBR Rubber Mixture — Dynamic-Mechanical Properties
The influence of frequency is demonstrated with the example of an SBR rubber mixture. As expected, with increasing frequency, the Tg (evaluated at 1 Hz) is shifted to a higher temperature and higher E' values are obtained (multi-frequency measurement in the dual cantilever bending at 2 K/min).
With a multi-frequency measurement, frequencies beyond the measurable range of the DMA can be achieved by using the superposition method. Employing the Williams-Landel-Ferry (WLF) equation, values such as E' and tanδ can be extrapolated to 100.000 Hz at a certain reference temperature (here -20°C). (measurment with DMA 242 E Artemis)
