CAP vs. DAP

CAP belongs to the thermoplastics classification, while DAP belongs to the thermoset plastics. There are 14 material properties with values for both materials. Properties with values for just one material (15, in this case) are not shown.

For each property being compared, the top bar is CAP and the bottom bar is DAP.

Cellulose Acetate Propionate (CAP)Diallyl Phthalate (DAP)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		35 to 50
Elongation at Break, %		31

Flexural Strength, MPa		29 to 56
Flexural Strength, MPa		62

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

Thermal Properties

Glass Transition Temperature, °C		190
Glass Transition Temperature, °C		150

Heat Deflection Temperature At 1.82 MPa (264 psi), °C		65 to 80
Heat Deflection Temperature At 1.82 MPa (264 psi), °C		160

Specific Heat Capacity, J/kg-K		1480
Specific Heat Capacity, J/kg-K		1450

Thermal Conductivity, W/m-K		0.25
Thermal Conductivity, W/m-K		0.6

Thermal Expansion, µm/m-K		14
Thermal Expansion, µm/m-K		25

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm		15
Dielectric Strength (Breakdown Potential), kV/mm		40

Electrical Resistivity Order of Magnitude, 10^x Ω-m		16
Electrical Resistivity Order of Magnitude, 10^x Ω-m		13

Otherwise Unclassified Properties

Density, g/cm³		1.2
Density, g/cm³		1.7

Common Calculations

Strength to Weight: Axial, points		6.5 to 10
Strength to Weight: Axial, points		4.5

Strength to Weight: Bending, points		17 to 23
Strength to Weight: Bending, points		12

Thermal Diffusivity, mm²/s		0.14
Thermal Diffusivity, mm²/s		0.24