Ageing effects around the glass and melting transitions in   poly(dimethylsiloxane) visualized by resistance measurements
  The process of ageing in rubbers requires monitoring over long periods (days to years). To do so in non-conducting rubbers, small amounts of carbon-black particles were dispersed in a fractal network through the rubber matrix, to make the rubber conducting without modifying its properties. Continuous monitoring of the resistance reveals the structural changes around the glass and melting transitions and especially details about the hysteresis and ageing processes. We illustrate the method for the semicrystalline polymer poly(dimethylsiloxane) (PDMS). 
H. B. Brom, I. G. Romijn, J. G. Magis, M. van der Vleuten, M. A. J.   Michels