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Apexazole® Polybenzimidazole PBI Resin
Apexazole® PBI is a fully aromatic heterocyclic high-performance thermoplastic polymer that, thanks to its exceptional thermodynamic properties, sets an industry‑leading benchmark for engineering plastics. With a glass transition temperature as high as 427°C, it remains non‑flammable, non‑melting, and non‑shrinkable even under severe high‑temperature combustion conditions. At the same time, it exhibits outstanding mechanical strength, excellent resistance to strong acids and bases, and superior electrical insulation, enabling it to withstand extreme service conditions that other specialty engineering plastics cannot endure. As such, it ranks among the highest‑performing specialty engineering plastics available today.
In terms of molding and processing, PBI powder can be used to produce AU‑60‑grade profiles via compression molding, offering optimal overall performance and suitable for precision machining into various structural components. Composite materials modified by blending with polyether ether ketone (PEEK) or polyetherketoneketone (PEKK) are supplied as AT‑series pellets, ideal for injection molding and extrusion. Furthermore, PBI material solutions can also be employed to fabricate hollow fiber membranes, flat‑sheet membranes, cast films, and metallic coatings.
| Performance | Parameter | Performance | Parameter |
|---|---|---|---|
| Thermal decomposition temperature | >600℃ | Hot deformation temperature | 435℃ |
| Glass transition temperature | 427℃ | Instantaneous temperature tolerance | 760℃ |
| Maximum short-term operating temperature: 2 hours | 500℃ | Thermal conductivity at 23°C | 0.4 W/(K·m) |
| Linear thermal expansion coefficient, 23–150°C | 25 (10⁻⁶ 1/K) | Linear thermal expansion coefficient >150°C | 35 (10⁻⁶ 1/K) |
| UL Rating (1.5/3.0 mm) | V-0 | Limiting Oxygen Index | 58 |
| Weightlessness | 30% weight loss at 900℃ | - | - |
Mechanical Performance Parameters
| Performance | Parameter | Performance | Parameter |
|---|---|---|---|
| Tensile strength | 174MPa | Flexural strength | 227MPa |
| Coefficient of friction with steel | 0.27 | Compressive strength | 410MPa |
| Yield strength / Tensile strength | NYP/130 (MPa) | Ball indentation hardness | 375MPa |
| Elongation at break of resin | 30% | Elastic modulus | 6000 |
| Fiber elongation at break | 15% | Density | 1.3 g/cm³ |
Electrical Performance Parameters
| Performance | Parameter | Performance | Parameter |
|---|---|---|---|
| Dielectric strength | 28kV/mm | Dielectric constant | 3.3 |
| Body surface resistance | >10*13Ω | Volume resistivity | >10*14Ω·cm |
| Conductivity at 100 Hz | 0.001 | Conductivity at 1 MHz | 0.002 |
| Dielectric loss tan δ – 100 Hz | 0.001 | - | - |
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