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Borosilicate Glass vs. PP Copolymer

Borosilicate glass and PP copolymer belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while PP copolymer is polymeric. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 12 material properties with values for both materials. Properties with values for just one material (21, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is borosilicate glass and the bottom bar is PP copolymer.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
0.9 to 1.1
Flexural Strength, MPa 34 to 69
31
Tensile Strength: Ultimate (UTS), MPa 280
23 to 33

Thermal Properties

Maximum Temperature: Mechanical, °C 360
80
Melting Onset (Solidus), °C 560
150

Electrical Properties

Dielectric Constant (Relative Permittivity) At 1 Hz 4.8 to 5.5
2.2 to 2.3
Dielectric Strength (Breakdown Potential), kV/mm 5.0 to 34
21 to 22

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
0.9

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
0.56 to 0.68
Stiffness to Weight: Bending, points 55 to 61
36 to 38
Strength to Weight: Axial, points 30 to 35
7.1 to 10
Strength to Weight: Bending, points 36 to 43
20 to 25