UPVC vs. PFA

Both uPVC and PFA are thermoplastics. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is uPVC and the bottom bar is PFA.

Unplasticized (Rigid) Polyvinyl Chloride (uPVC, PVC-U)Perfluoroalkoxy (PFA)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		58
Elongation at Break, %		300

Flexural Modulus, GPa		3.5
Flexural Modulus, GPa		0.7

Tensile Strength: Ultimate (UTS), MPa		47
Tensile Strength: Ultimate (UTS), MPa		30

Thermal Properties

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		69
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		50

Heat Deflection Temperature At 455 kPa (66 psi), °C		90
Heat Deflection Temperature At 455 kPa (66 psi), °C		75

Maximum Temperature: Mechanical, °C		95
Maximum Temperature: Mechanical, °C		260

Melting Onset (Solidus), °C		180
Melting Onset (Solidus), °C		300

Specific Heat Capacity, J/kg-K		880
Specific Heat Capacity, J/kg-K		1000

Thermal Conductivity, W/m-K		0.16
Thermal Conductivity, W/m-K		0.25

Thermal Expansion, µm/m-K		61
Thermal Expansion, µm/m-K		120

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz		3.4
Dielectric Constant (Relative Permittivity) At 1 Hz		2.1

Dielectric Strength (Breakdown Potential), kV/mm		19
Dielectric Strength (Breakdown Potential), kV/mm		22

Electrical Resistivity Order of Magnitude, 10^x Ω-m		15
Electrical Resistivity Order of Magnitude, 10^x Ω-m		16

Otherwise Unclassified Properties

Density, g/cm³		1.4
Density, g/cm³		2.2

Limiting Oxygen Index (LOI), %		42
Limiting Oxygen Index (LOI), %		80

Water Absorption After 24 Hours, %		0.24
Water Absorption After 24 Hours, %		0

Common Calculations

Strength to Weight: Axial, points		9.1
Strength to Weight: Axial, points		3.9

Strength to Weight: Bending, points		20
Strength to Weight: Bending, points		10

Thermal Diffusivity, mm²/s		0.13
Thermal Diffusivity, mm²/s		0.12