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Borosilicate Glass vs. NBR Rubber

Borosilicate glass and NBR rubber belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while NBR rubber is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 8 material properties with values for both materials. Properties with values for just one material (22, in this case) are not shown.

For each property being compared, the top bar is borosilicate glass and the bottom bar is NBR rubber.

Metric UnitsUS Customary Units

Material Properties

Density, g/cm3 2.2 to 2.6
1.3
Maximum Temperature: Mechanical, °C 360
110
Specific Heat Capacity, J/kg-K 830
1350
Strength to Weight: Axial, points 30 to 35
3.9
Strength to Weight: Bending, points 36 to 43
12
Tensile Strength: Ultimate (UTS), MPa 280
18
Thermal Conductivity, W/m-K 1.2
0.25
Thermal Diffusivity, mm2/s 0.54 to 0.63
0.15