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PPSU vs. CPVC

Both PPSU and CPVC are thermoplastics. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is PPSU and the bottom bar is CPVC.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 140
70
Elastic (Young's, Tensile) Modulus, GPa 3.6
2.8
Elongation at Break, % 26
4.0
Flexural Modulus, GPa 4.7
2.5
Flexural Strength, MPa 130
100
Impact Strength: Notched Izod, J/m 80
510
Rockwell R Hardness 130
120
Tensile Strength: Ultimate (UTS), MPa 95
50

Thermal Properties

Glass Transition Temperature, °C 220
100
Heat Deflection Temperature At 1.82 MPa (264 psi), °C 210
91
Maximum Temperature: Autoignition, °C 580
640
Maximum Temperature: Mechanical, °C 160
80
Specific Heat Capacity, J/kg-K 970
780
Thermal Conductivity, W/m-K 0.24
0.31
Thermal Expansion, µm/m-K 45
65

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 3.8
3.7
Dielectric Strength (Breakdown Potential), kV/mm 16
49
Electrical Resistivity Order of Magnitude, 10x Ω-m 14
13

Otherwise Unclassified Properties

Density, g/cm3 1.4
1.5
Limiting Oxygen Index (LOI), % 38
57
Water Absorption After 24 Hours, % 0.44
0.030

Common Calculations

Stiffness to Weight: Axial, points 1.4
1.0
Stiffness to Weight: Bending, points 36
32
Strength to Weight: Axial, points 19
9.4
Strength to Weight: Bending, points 33
20
Thermal Diffusivity, mm2/s 0.17
0.27
Thermal Shock Resistance, points 42
20