FIRE RESISTANCE OF FLUOROPOLYMERS

摘要

ECTFE coated exhaust duct installed in CPI and semi-conductor factories requires flame resistance for fire protection and chemical resistance for corrosion protection. Among partially fluorinated polymers, ECTFE has the highest flame resistance from the pointof view of oxygen index, ignition resistance and fire spray. It has the highest critical heat flux, ignition time, and self-ignition temperature among partially fluorinated polymers. The flammability of ECTFE has a very low sensitivity to coating thickness change. In addition, it also provides a very smooth surface better than other fluorinated polymers and as a result of its crystallization morphology. ECTFE has a relative bulkier chlorine atom along its polymer segment to give a higher rigidity than other partially fluorinated polymers. In general, this contributes to its higher hardness, lower expansion coefficient and lower chemical permeability. The fire resistance of ECTFE will be compared to other fluoropolymers, especially ETFE.