Polyetheretherketone (PEEK) is a very popular high-performance plastic and belongs to the group of polaryletherketones.
|DSC 204 F1 Phoenix®
|IsothermalTests at controlled and constant temperature are called isothermal.Isothermal Phase
|3 min / 3 min / 5 min
|Al, pierced lid
|N2 (40 ml/min)
The peak Melting Temperatures and EnthalpiesThe enthalpy of fusion of a substance, also known as latent heat, is a measure of the energy input, typically heat, which is necessary to convert a substance from solid to liquid state. The melting point of a substance is the temperature at which it changes state from solid (crystalline) to liquid (isotropic melt).melting temperature of the PEEK sample of approx. 342°C was essentially the same in both heatings (1st heating, blue and 2nd heating, red). The melting transition in the 2nd heating was more complex than in the 1st heating. The melting enthalpy increased from 41 J/g in the 1st heating to approx. 57 J/g in the 2nd heating, an increase of almost 40%. 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 temperature, which characterizes the amorphous part, was 151°C (midpoint) in the 2nd heating (red).