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Cellulose Acetate (CA)
Material Properties
Density: 1.3 g/cm3 (81 lb/ft3)
Dielectric Constant (Relative Permittivity): 3.6
Dielectric Strength (Breakdown Potential): 15 kV/mm (0.6 V/mil)
Electrical Resistivity Order of Magnitude: 16 10x Ω-m
Elongation at Break: 25 to 30 %
Flexural Modulus: 1.7 to 2.1 GPa (0.25 to 0.30 x 106 psi)
Flexural Strength: 40 to 55 MPa (5.8 to 8.0 x 103 psi)
Glass Transition Temperature: 230 °C (450 °F)
Heat Deflection Temperature: At 1.82 MPa (264 psi): 65 to 75 °C (150 to 170 °F)
Heat Deflection Temperature: At 455 kPa (66 psi): 75 to 85 °C (170 to 190 °F)
Limiting Oxygen Index (LOI): 17 %
Refractive Index: 1.48
Specific Heat Capacity: 1500 J/kg-K
Strength to Weight Ratio: 23 to 28 kN-m/kg
Tensile Strength: Ultimate (UTS): 30 to 37 MPa (4.4 to 5.4 x 103 psi)
Tensile Strength: Yield (Proof): 26 to 33 MPa (3.8 to 4.8 x 103 psi)
Thermal Conductivity: 0.25 W/m-K
Thermal Expansion: 14 µm/m-K
Vicat Softening Temperature: 100 to 110 °C (210 to 230 °F)
Water Absorption: After 24 Hours: 2.3 %
See Also
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
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