Effect of Glass Fibres and Fire Retardant on the Combustion Behaviour of Composites, Glass Fibres-Poly(butylene terephthalate)

摘要

The oxygen index (OI) of poly (butylene terephthalate) (PBT) tends to decrease when it is combined with milled-glass fibres either with or without the sizing treatment. This show that the previously found apparent increase of flammability of PBT glass fibre composities (GFPBT) as compared to PBT is not due to the introduction of the flammable sizing together with the glass fibres in the polymer which was one suggested explanation in the literature, but rather to the wick and anti-dripping effects of glass fibres. The effectiveness of a typical brominated organic compound-antimony trioxide fire retardant system (FR), as measured by OI, is found to be larger in GFPBT as compared to PBT.