PVC-P vs. CAP

Both PVC-P and CAP are thermoplastics. There are 13 material properties with values for both materials. Properties with values for just one material (23, in this case) are not shown.

For each property being compared, the top bar is PVC-P and the bottom bar is CAP.

Plasticized (Flexible) Polyvinyl Chloride (PVC-P)Cellulose Acetate Propionate (CAP)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		180
Elongation at Break, %		35 to 50

Tensile Strength: Ultimate (UTS), MPa		16
Tensile Strength: Ultimate (UTS), MPa		28 to 45

Thermal Properties

Glass Transition Temperature, °C		75
Glass Transition Temperature, °C		190

Specific Heat Capacity, J/kg-K		1400
Specific Heat Capacity, J/kg-K		1480

Thermal Conductivity, W/m-K		0.17
Thermal Conductivity, W/m-K		0.25

Thermal Expansion, µm/m-K		160
Thermal Expansion, µm/m-K		14

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm		20
Dielectric Strength (Breakdown Potential), kV/mm		15

Electrical Resistivity Order of Magnitude, 10^x Ω-m		11
Electrical Resistivity Order of Magnitude, 10^x Ω-m		16

Otherwise Unclassified Properties

Density, g/cm³		1.4
Density, g/cm³		1.2

Water Absorption After 24 Hours, %		0.45
Water Absorption After 24 Hours, %		1.4 to 1.7

Common Calculations

Strength to Weight: Axial, points		3.2
Strength to Weight: Axial, points		6.5 to 10

Strength to Weight: Bending, points		10
Strength to Weight: Bending, points		17 to 23

Thermal Diffusivity, mm²/s		0.090
Thermal Diffusivity, mm²/s		0.14