Mean coefficient of linear expansion a
20/300 acc. to DIN 52328 |
3.3 · 10-6 K-1 |
Transformation temperature Tg |
525 ºC |
Temperature fixed points at viscosity h
in dPa · s: |
1013
upper annealing point |
560 ºC |
107.6 softening point |
825 ºC |
104 working point |
1260 ºC |
Maximum short-time working temperature |
500 ºC |
Density r |
2.23 g · cm-3 |
Modulus of elasticity E, Young's modulus |
64 · 103 N · mm-2 |
Poisson's ratio m |
0.20 |
Thermal conductivity lw at
90 ºC |
1.2 W · m-1 · K-1 |
Temperature for the specific electrical resistance of 108
W · cm tk 100 |
250 ºC |
Logarithm of the electric volume resistance (W
· cm) |
at 250 ºC |
8 |
at 350 ºC |
6.5 |
Dielectric properties (1MHz, 25 ºC) |
Dielectric figure e |
4,6 |
Dielectric loss factor tan d |
37 · 10-4 |
Refractive index nd (l
= 587,6 nm) |
1.473 |
Stress-optical constant ( DIN 52314) K |
4.0 · 10-6 mm2 · N-1 |