Synthesis and properties of random polysulfone/polyethersulfone copolymers as high-performance polymers

摘要

A series of random polysulfone/polyethersulfone (PSF/PES) copolymers were synthesized by the poly condensation of 4,4'-isopropylidenediphenol, 4,4'-dihydroxyldiphenylsulfone, and 4,4'-dichlorodiphenylsulfone in the presence of potassium carbonate. The resulting copolymers displayed similar solubility with PSF and PES. The glass transition temperature and the 5% weight loss temperature of these copolymers varied in the range of 199℃-299℃ and 467℃-498℃, respectively, which showed excellent thermal stability. Moreover, the elongation at break of these copolymers was much higher than that of PES, whereas the tensile strength was a little lower.