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Cyclic Olefin Copolymer (COC)

COC is an otherwise-unclassified thermoplastic material. It has a moderately low ductility and a moderately low density among thermoplastics. The graph bars on the material properties cards below compare COC to: otherwise unclassified thermoplastics (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

3.0 GPa 0.44 x 106 psi

Elongation at Break

2.5 %

Tensile Strength: Ultimate (UTS)

60 MPa 8.7 x 103 psi

Thermal Properties

Heat Deflection Temperature At 455 kPa (66 psi)

130 °C 270 °F

Thermal Expansion

60 µm/m-K

Other Material Properties


1.0 g/cm3 62 lb/ft3

Electrical Resistivity Order of Magnitude

14 10x Ω-m

Refractive Index


Water Absorption After 24 Hours

0 %

Common Calculations

Stiffness to Weight: Axial

1.7 points

Stiffness to Weight: Bending

48 points

Strength to Weight: Axial

17 points

Strength to Weight: Bending

34 points

Thermal Shock Resistance

24 points

Followup Questions

Further Reading

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