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The chemical and structural transformations which result from the pyrolisis of Kevlar (poly[p-phenyleneterephthalamide]) fibres in argon, and from subsequent activations to differing levels of burn-off, under differing activation conditions in CO 2 , have been investigated using XPS, SEM and XRD. XPS indicates a marked decrease in surface oxygen after pyrolysis followed by the formation of...
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