Physical ageing studied by a device allowing for rapid thermal equilibration

摘要: Ageing of organic glasses to the equilibrium liquid state is studied by measuring dielectric loss utilizing a microregulator where temperature controlled means Peltier element. Compared conventional equipment new device adds almost two orders magnitude span observable ageing times. Data for five glass-forming liquids are presented. The existence an "inner clock" confirmed model-free test showing that structure same material time controls properties. At long times relaxation not stretched, but simple exponential, and there no "expansion gap" between limits rates following up down jumps temperature.