Heat and Solvent Resistant Electrospun Polybenzoxazole Nanofibers from Methoxy‐Containing Polyaramide

Abstract

Polybenzoxazole (PBO) nanofibers were prepared via electrospinning and thermal conversion from its precursor, methoxy‐containing polyaramide (MeO‐PA). The MeO‐PA was synthesized from low‐cost monomers. The structures and properties of polymers (MeO‐PA and PBO) were characterized by FT‐IR, TGA, DSC, OPM, SEM, and so forth. It was found that the PBO nanofibers had a diameter ranging from 300 nm to 350 nm. The PBO nanofiber mats with high porosity provided a promising prospect in high‐temperature filter materials, heat insulation materials, and high‐temperature protection materials for its outstanding heat and solvent resistance and in preparing carbon nanofibers for its high char yield percentage.