Synthesis of novel heat-resistant and soluble poly(aryl ether sulfone ketone) s containing ether-type bisphthalazinone moiety

A series of poly(bisphthalazinone ether sulfone ketone)s with pendant phenyl groups (POPESKs) were synthesized via aromatic nucleophilic substitution polycondensation. The thermal degradation mechanism of POPESKs was determined investigated by TG-FTIR. The Tgs of POPESKs range from 296 to 326 degrees C and the storage modulus retention is up to 46.1 % at 290 degrees C. POPESKs have good solubility in dichloroethane, chloroform, tetrachloroethane, N-methyl-2-pyrrolidone and pyridine, and exhibit good film-forming property. The tensile strength, tensile modulus, and tensile elongation of POPESK films are 85-96 MPa, 1.34-1.86 GPa, and 8.9-11.6 %, respectively. Meanwhile, the polymer films exhibit the high light transmittance of up to 83 % at 800 nm and its water contact angle are in the range of 82.3-94.3 degrees. Its superior overall performance shows great potential in aerospace, petrochemical and energy applications.