The present invention relates to a method of preparing poly(acrylonitrile) fibers comprising: (i) providing a solution of poly(acrylonitrile) and a polyazide compound; and (ii) electrospinning the solution of poly(acrylonitrile) and a polyazide compound to provide fibers. The poly(acrylonitrile) fibers which are obtainable by the method are also claimed.
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