Epoxy vs. PPO

Epoxy belongs to the thermoset plastics classification, while PPO belongs to the thermoplastics. There are 11 material properties with values for both materials. Properties with values for just one material (19, in this case) are not shown.

For each property being compared, the top bar is epoxy and the bottom bar is PPO.

Epoxy Polyphenylene Oxide (PPO)

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, %		4.5
Elongation at Break, %		3.5 to 28

Tensile Strength: Ultimate (UTS), MPa		67
Tensile Strength: Ultimate (UTS), MPa		63 to 140

Thermal Properties

Maximum Temperature: Mechanical, °C		130
Maximum Temperature: Mechanical, °C		100 to 110

Specific Heat Capacity, J/kg-K		1500
Specific Heat Capacity, J/kg-K		1020 to 1250

Thermal Expansion, µm/m-K		100
Thermal Expansion, µm/m-K		25 to 60

Electrical Properties

Dielectric Strength (Breakdown Potential), kV/mm		16
Dielectric Strength (Breakdown Potential), kV/mm		19 to 21

Electrical Resistivity Order of Magnitude, 10^x Ω-m		13
Electrical Resistivity Order of Magnitude, 10^x Ω-m		15

Otherwise Unclassified Properties

Density, g/cm³		1.3
Density, g/cm³		1.1 to 1.4

Limiting Oxygen Index (LOI), %		20
Limiting Oxygen Index (LOI), %		32

Common Calculations

Strength to Weight: Axial, points		14
Strength to Weight: Axial, points		16 to 27

Strength to Weight: Bending, points		28
Strength to Weight: Bending, points		33 to 42