Generic PBI-B15 PBI-B25 PBI-B45 Copolymer Membrane (MW 120,000) for Fuel Cells (PBI-B15 (MW120,000), 10×10cm)

Polybenzimidazole (PBI) is a high-performance aromatic polymer with benzimidazole groups as repeating units. With a rigid backbone and nitrogen-rich heteroaromatic rings, PBI demonstrates exceptional thermal stability, chemical resistance, and mechanical strength. It is recognized as the most thermally stable, processable engineering plastic currently available.

• ✅ Extreme Thermal Endurance: Decomposition temperature >600 °C, glass transition temperature (Tg) 427 °C, short-term stability up to 760 °C
• ✅ Flame-Resistant & Non-Melting: UL V-0 rating, limiting oxygen index (LOI) 58, non-dripping, low smoke, and low toxicity
• ✅ Acid, Alkali & Oxidation Resistant: Stable in harsh chemical environments
• ✅ Electrical Insulation: Low dielectric constant, volume resistivity >10¹⁴ Ω·cm
• ✅ Outstanding Mechanical Performance: Tensile strength 174 MPa, compressive strength 410 MPa