Polyamide 4.6 (PA4.6) is a polycondensation product of tetramethylene diamine and adipic acid. Polyamides derived from diamines and dicarboxylic acids of the type H2N–(CH2)x–NH2 and HOOC–(CH2)y–COOH are designated PAZ1.Z2, where Z1 refers to the number of carbon atoms in the diamine and Z2 to the number of carbon atoms in the dicarboxylic acid (Z1 = x, Z2 = y + 2, see structural formula).
|DSC 204 F1 Phoenix®
|IsothermalTests at controlled and constant temperature are called isothermal.Isothermal Phase
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|N2 (50 ml/min)
In this example, an endothermal melting effect was observed with a peak temperature of 292°C (2nd heating, red) and an enthalpy of 91 J/g. The midpoint temperature of 58°C of the Glass Transition TemperatureThe glass transition is one of the most important properties of amorphous and semi-crystalline materials, e.g., inorganic glasses, amorphous metals, polymers, pharmaceuticals and food ingredients, etc., and describes the temperature region where the mechanical properties of the materials change from hard and brittle to more soft, deformable or rubbery.glass transition in the 1st heating (blue) increased to 74°C in the 2nd heating (red) as a result of water evaporation (small peak at 129°C with an enthalpy of 0.6 J/g) during the 1st heating. The shoulder at around 240°C prior to the main melting peak in the 1st heating is due to the thermomechanical history of the sample since it was absent in the 2nd heating.