PEKEKK: Polyacryletherketoneetherketoneketone

General Properties

Structural Formula


Properties

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 Temperature165 to 175°C
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 Temperature380 to 390°C
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 Enthalpy60 J/g
Decomposition Temperature580 to 600°C
Young's Modulus4300 MPa
Coefficient of Linear Thermal Expansion45 *10-6/K
Specific Heat Capacity-
Thermal ConductivityThermal conductivity (λ with the unit W/(m•K)) describes the transport of energy – in the form of heat – through a body of mass as the result of a temperature gradient (see fig. 1). According to the second law of thermodynamics, heat always flows in the direction of the lower temperature.Thermal Conductivity0.29 W/(m*K)
Density1.3 g/cm³
MorphologySemi-crystalline thermoplastic
General propertiesGood mechanical properties. High temperature and heat resistance. Good chemical resistance. Low humidity absorption. Good electrical insulation. Good dimensional stability
ProcessingExtrusion, injection molding
ApplicationsMechanical engineering. Transportation and conveyor technique. Automobile industry. Chemical plant construction

NETZSCH Measurement

InstrumentDSC 204 F1 Phoenix®
Sample Mass10.69 mg
IsothermalTests at controlled and constant temperature are called isothermal.Isothermal Phase3 min / 5 min
Heating/Colling Rates10 K/min
CrucibleAl, pierced lid
AtmosphereN2 (40 ml/min)

Evaluation

Since the polymer is semi-crystalline, it exhibits both a melting transition and a 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. 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 for the example occurred at approx. 168°C (2nd heating, red, midpoint), and the melting transition at 387°C (peak temperature, 2nd heating). The melting enthalpy increased from 47 J/g in the 1st heating (blue) to approx. 59 J/g in the 2nd heating, reflecting an increase in the crystalline content of the polymer. The height 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 step (Δcp), normally a measure of the amorphous content in the sample, remained nearly constant. The small shift of the 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 (peak temperature) between the 1st and 2nd heatings of nearly 2 K is due to the better contact between the sample and crucible bottom after the first melting.