TPI (Thermoplastic Polyimide)
TPI polymer is an amorphous when it is made by injection molding. Amorphous polymer shows better dimensional stability than crystalline or semi-crystalline polymer.
On the other hand, special treatment for amorphous TPI makes the crystallinity increasing. When the crystallinity of TPI increases, the thermal property is largely improved: the heat deflection temperature of natural TPI shows 315°C.
It is possible for PBI Advanced Materials to make an amorphous TPI by injection molding and a highly crystallized TPI by compression molding.
Typical properties of TPI
|Glass transition temperature: Tg||-||DSC||°C||~250|
|Tensile strength||23°C||ISO 527||MPa||90|
|Tensile strain at break
|Flexural strength||23°C||ISO 178||MPa||135|
|Flexural modulus||23°C||ISO 178||GPa||2.9|
|Charpy notched impact strength
||23°C||ISO 179||kJ m-2||-|