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Non-Halogenated, Flame Retarded Polycarbonate.

pdf icon Non-Halogenated, Flame Retarded Polycarbonate. (903 K)
Kashiwagi, T.; Cleary, T. G.; Davis, G. C.; Lupinski, J. H.

DOT/FAA/CT-93/3; DOT/FAA/93/3;

Federal Aviation Administration (FAA). International Conference for the Promotion of Advanced Fire Resistant Aircraft Interior Materials. February 9-11, 1993, Atlantic City, NJ, 175-187 pp, 1993.

Available from:

National Technical Information Service


aircraft interiors; fire resistant materials; test methods; fire safety; polycarbonates; cone calorimeters; flame spread; furniture calorimeters; siloxanes; heat release rate; ignition delay; char; char depth


Various flammability properties of a siloxane-containing bisphenol-A polycarbonate sample, with the siloxane as an additive or as a copolymer, were measured and compared with those of a pure polycarbonate sample. The results show that the peak heat release rate for the siloxane-containing polycarbonate sample is significantly reduced (less than half) compared to that for the pure polycarbonate sample with two different sizes of sample, 10cmx10cm and 40cmx40cm. However, the ignition delay time for the siloxane-containing sample is shorter than that for the pure polycarbonate sample. Also, the flame spread rate under an external radiant flux becomes faster for the siloxane-containing sample than that for the pure polycarbonate sample. The observed char behavior, such as char depth, physical nature and apparent combustibility, and its impact on flammability properties are discussed.