A survey of the use of cyclo- and poly(phosphazenes) in fire resis tant applications is presented. Where appropriate, synthesis and commercial availability will be indicated. Two fundamentally different approaches, phosphazenes as additives or as intrinsically flame resistant materials, will be discussed. While the former category is limited to cyclophosphazenes, the lat ter involves linear poly(phosphazenes), cyclolinear and cyclomatrix materials and carbon chain polymers with cyclophosphazenes as substituents.
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