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Silicone Rubber (PMQ, PVMQ, VMQ)

PMQ rubber is a thermoset elastomer or rubber material. It has a fairly low tensile strength and a moderately high ductility among rubber materials. The graph bars on the material properties cards below compare PMQ rubber to other rubber materials (top) 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

Elongation at Break

480 %

Tensile Strength: Ultimate (UTS)

8.0 MPa 1.2 x 103 psi

Thermal Properties

Glass Transition Temperature

-130 °C -200 °F

Maximum Temperature: Autoignition

410 °C 760 °F

Maximum Temperature: Decomposition

460 °C 850 °F

Maximum Temperature: Mechanical

220 °C 430 °F

Specific Heat Capacity

1590 J/kg-K 0.38 BTU/lb-°F

Thermal Conductivity

0.23 W/m-K 0.13 BTU/h-ft-°F

Otherwise Unclassified Properties

Density

1.2 g/cm3 75 lb/ft3

Limiting Oxygen Index (LOI)

32 %

Common Calculations

Strength to Weight: Axial

1.9 points

Strength to Weight: Bending

7.4 points

Thermal Diffusivity

0.12 m2/s

Followup Questions

Further Reading

Rubber Formulary, The, Peter A. Ciullo and Norman Hewitt, 1999