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The ammonia curing behavior of a novel poly[(alkylamino)borazine] fiber and the effect of curing temperature, holding time and heating rate were studied. The results revealed that temperature had a great impact on gel content. With increasing of temperature and holding time, the gel content, weight loss and reduction of carbon content increased. While with elevation of heating rate, the above indexes...
Nearly stoichiometric boron nitride (BN) fiber with low dielectric constant was prepared by curing, pyrolysis of a novel poly[(alkylamino)borazine] (PAAB) under NH 3 up to 1200°C in a ceramic yield of 60wt.%. Based on IR, XRD, XPS and elemental analysis (EA), the fiber with a composition of BN 1.09 shows a characteristic of turbostratic BN (t-BN). The tensile strength is approximately...
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