The thermal properties of polypropylene are displayed in the table below. The MonoBlock™ is made of PP co-polymer. Housing details can be made of PP homopolymer and glassfibre reinforced PP.
Polypropylene
|
Unit |
PP co-polymer |
PP Glassfibre reinforced |
PP homopolymer | |
Coefficient of linear thermal expansion
|
alpha | °C 10-5 | 5,8-11,0 | 2,9-5,2 | 8,0-10,0 |
Specific heat
|
Cp | kJ/kg°C | 1,80-2,00 | 1,80-2,00 | 1,80-2,00 |
Thermal conductivity
| J/m s°C | 0,15-0,17 | 0,15-0,37 | 0,12 | |
Glass transition temperature
|
Tg | °C | -18 | -10 | |
Melting point
|
Tm | °C | 160-168 | 168 | |
Vicat softening point
|
Tv | °C | 146-150 | 155-165 | 150-158 |
Heat deflection temperature
|
THDT | °C | 50-60 | 60-145 | 50-70 |
Temperature index (UL)
|
TUL | °C | 80-115 | 105-115 | 50-115 |
Brittleness temperature
|
Tfs | °C | -40 | -10 | -10 |
max. continuous service temperature
|
Tml | °C | 90-120 | 90-120 | 80-120 |
max. continuous service temperature
|
Tmv | °C | 90-100 | 100 | 90-100 |