Modulated-temperature Thermomechanical Analysis
نویسنده
چکیده
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 “nonreversing” part arising from relaxation to the disordered state on heating above Tg . Some preliminary results for biaxially drawn poly(ethylene terephthalate) film are presented.
منابع مشابه
Novel methods of modulated-temperature thermal analysis
Two novel methods of Modulated-Temperature Thermal Analysis are described. These are loosely-termed `̀ Constrained Rate DSC'' and `̀ Modulated-Temperature TMA''. In the ®rst, the sample response is used to control the temperature program of a DSC in a method analogous to Controlled Rate Thermal Analysis. This results in a temperature modulation which is variable in period, amplitude and underlyin...
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