Thermomechanical properties of fibers from copolymers of acrylonitrile and vinylic monomers

Property changes of powdery polyacrylonitrile synthesized by aqueous suspension polymerization during heat-treatment process under air atmosphere

“…Acidic comonomers such as acrylic acid (AA), methacrylic acid (MAA) and itaconic acid (IA) are usually copolymerized with acrylonitrile (AN) to synthesize polyacrylonitrile (PAN) copolymers, which can provide supplemental dye sites, modify the fiber morphology, increase the hydrophilicity and facilitate the cyclization of nitrile groups during thermo-oxidative stabilization of acrylic fibers prior to carbonization [1][2][3][4][5][6].…”