PFA: Perfluoroalkoxy

General Properties

Short Name:

Name: 

PFA

Perfluoroalkoxy


Perfluoroalkoxy polymers (PFA in short) are entirely fluorinated plastics with a high-molecular structure. In contrast to PTFE, PFA has side chains of perfluorinated alkoxy groups.

Structural Formula


Properties

Glass Transition Temperature-
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 Temperature285 to 305°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 Enthalpy20 to 30 J/g
Decomposition Temperature353 to 550°C
Young's Modulus800 MPa
Coefficient of Linear Thermal Expansion120 *10-6/K
Specific Heat Capacity-
Thermal Conductivity-
Density2.14 to 2.16 g/cm³
MorphologySemi-crystalline polymer
General propertiesLow friction value. High chemical resistance. Extremely low adhesion. Non-inflammability
ProcessingExtrusion, injection molding
ApplicationsHoses and fittings. Construction of chemical plants (corrosion-resistant lining). Nonstick coating, corrosion protection

NETZSCH Measurement

InstrumentDSC 204 F1 Phoenix®
Sample Mass16.07 mg
Isothermal Phase5 min
Heating/Colling Rates10 K/min
CrucibleAl, pierced lid
AtmosphereN2 (40 ml/min)

Evaluation

Although PFA belongs to semi-crystalline materials, in the present example only the melting transition is evident in the DSC curve with peak temperatures of 289°C (1st heating, blue) and 290°C (2nd heating, red). The absence of a Temperatura di transizione vetrosaLa transizione vetrosa è una delle più importanti proprietà chimico-fisiche dei materiali amorfi e semi-cristallini, come, ad esempio, vetri, metalli (amorfi), polimeri, ingredienti farmaceutici e alimentari e definisce l’intervallo di temperatura in cui le proprietà meccaniche die materiali variano da duro e fragile a più morbido, malleabile o gommoso.glass transition signal indicates that the change in specific heat Δcp associated with the transition from the hard, brittle into the flexible state, is too small to be detected by DSC.