Poly(para-phenylene) fibers – Characterization and preliminary data for conversion to carbon fiber

Given the exceptionally high thermal stability of poly (para-phenylene) (PPP) among linear polyaromatics, it is expected that PPP fibers will have myriad applications. In this study, were obtained starting from enzymatic dihydroxylation/reduction benzene to 5,6-cis-dihydroxycyclohexa-1,3-diene, followed by esterification, polymerization, and aromatization. Polymer precursor was characterized in terms its rheological properties. High levels aromatization achieved, mostly para-linked. Carbonization pyrolysis studied at different temperatures (600–1500 °C). Fourier transform infrared Raman spectroscopy results showed transformed into disordered carbon above 800 °C, similarly commercial fiber (CF). Scanning electron microscopy analysis CFs had smooth surfaces, nonporous, retained their original shape during carbonization steps. Our research highlights potential using as an alternate CF.