“…Polymers with long hydrocarbon chains are commonly used as precursors in carbon fiber synthesis. Several polymers, including poly(acrylonitrile), PAN, [ 4 ], poly(furfuryl alcohol) [ 5 ], poly(vinylidene fluoride), PVDF, [ 6 ], poly(vinyl alcohol) [ 7 ], poly(amic acid), PAA, [ 8 ], poly(p-xylene tetrahydrothiophenium chloride),PXTC, [ 9 ], poly(vinylidene chloride),PVDC, [ 6 ], and phenolic resin [ 10 ], resulted in over 50% carbon yield when synthesized with acrylonitrile in cyanide acid (HCN) [ 11 ]. With high carbon content, up to 54.5%, for polyvinyl alcohol (PVA), this polymer is considered appropriate as a precursor, and, moreover, it has high solubility in water, it is non-toxic, and acts as a reduction agent [ 12 , 13 , 14 ].…”