CELAZOLE® PBI (POLYBENZIMIDAZOLE)
Material Information
Celazole® is Dupont’s brand name for the high performance imidized thermoplastic called PBI. It is a very clean material in terms of ionic impurity and does not outgas with the exception of water. This makes Celazole® PBI ideal for semiconductor manufacturers and vacuum chamber applications. It is the highest performing engineering plastic available. Celazole® PBI has the highest heat resistance and mechanical property retention over 400º F of any unfilled plastic. It also has the best wear resistance and load carrying capacity than any other engineering plastic. Overall, it is an excellent thermal insulator, has excellent ultrasonic transparency, has good chemical resistance, and other plastics in melt do not stick to it. Cerlazole® PBI is available in the forms of sheet and rod.
Application
- High heat insulator bushings
- Electrical connectors
- Ball valve seats
- Wafer retaining rings for gas plasma etching
- Vacuum tips
- Wafer carriers
- Contact seals
- Thermal isolators
- Guide rollers
- Aerospace applications
- Automotive applications
- Chemical process
Properties
- The best heat resistance and mechanical retention over 400º F of any unfilled plastic
- High compressive and dimensional stability
- Best wear resistance and load carrying capacity of all engineering plastics
- Excellent electrical insulator
- No outgas (except water)
- High water absorption
- Soluble in aprotic solvents
- Very clean in terms of ionic impurity
- Excellent ultrasonic transparency
Physical |
Astm Test Method |
Celazole® (PBI) |
| Density (lb/in^3) | D792 | 0.047 |
| Specific Gravity | D792 | 1.3 |
| Water Absorption @ 24 hours (%) | D570 | 0.4 |
Mechanical |
||
| Tensile Strength (PSI) | D638 | 23,000 |
| Tensile Modulus (PSI) | D638 | 850,000 |
| Tensile Elongation at Break (%) | D638 | 3 |
| Flexural Strength (PSI) | D790 | 32,000 |
| Flexural Modulus (PSI) | D790 | 950,000 |
| Izod Impact (Notched), ft-lb/in | D256 | 0.5 |
| Rockwell Hardness |
D785 | E105 |
Thermal |
||
| Coefficient of Thermal Expansion, 10^-5/°F |
D696 | 1.3 |
| Heat Deflection Temperature 264 psi, ºF | D648 | 800 |
| Glass Transition Temperature, °F | D3418 | 750 |
| Continous Service Temp (Operating), °F | – | 650 |
| Flammability Rating | UL94 | V-0 |
Electrical |
||
| Dielectric Strength, Short Term, (Volts/Mil) @ .125″ Thick |
D149 | 550 |
| Volume Resistivity (ohm-cm) @ 50% RH | D257 | >10^13 |
| Dielectric Constant at 1 MHz | D150 | 4.2 |
| Dissipation Factor at 1 MHz | D150 | – |
NOTE:
The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.