Price, D.M.; Modulated-Temperature Thermomechanical Analysis. Journal of Thermal Analysis 51(1) (1998) 231-236
By employing a "modulated-temperature" heating programme composed of a series of heat-isotherm stages, it is possible to separate the change in dimensions of an oriented material during heating into two contributions: a thermally "reversing" component which is due to linear thermal expansion and a "non-reversing" part arising from relaxation to the disordered state on heating above Tg. Some preliminary results for biaxially drawn poly(ethylene terephthalate) film are presented.