Dry PPA
Dry PPA is a grade of PPA. The graph bars on the material properties cards below compare dry PPA to: polyamide plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
2.2 GPa 0.32 x 106 psi
Elongation at Break
30 %
Flexural Modulus
2.4 GPa 0.35 x 106 psi
Flexural Strength
110 MPa 17 x 103 psi
Poisson's Ratio
0.4
Tensile Strength: Ultimate (UTS)
69 MPa 10 x 103 psi
Thermal Properties
Glass Transition Temperature
130 °C 260 °F
Heat Deflection Temperature At 1.82 MPa (264 psi)
120 °C 250 °F
Maximum Temperature: Decomposition
450 °C 830 °F
Melting Onset (Solidus)
310 °C 590 °F
Specific Heat Capacity
1400 J/kg-K 0.33 BTU/lb-°F
Thermal Conductivity
0.15 W/m-K 0.087 BTU/h-ft-°F
Otherwise Unclassified Properties
Density
1.1 g/cm3 71 lb/ft3
Water Absorption After 24 Hours
0.7 %
Common Calculations
Stiffness to Weight: Axial
1.1 points
Stiffness to Weight: Bending
38 points
Strength to Weight: Axial
17 points
Strength to Weight: Bending
33 points
Thermal Diffusivity
0.095 mm2/s
Followup Questions
Further Reading
ASTM D883: Standard Terminology Relating to Plastics
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999