Structure of Oxidized Polyacrylonitrile


CURRENT commercial methods for converting polyacrylonitrile based textile fibre to high elastic modulus carbon fibre usually1 but not essentially2 involve a first stage of heating to a temperature between 200 and 300° C in air. During this so-called preoxidation stage, a proportion of oxygen is taken into the modified polymer structure to produce a black… (More)
DOI: 10.1038/224688a0


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