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.

Automated summary

A series of poly(bisphthalazinone ether sulfone ketone)s with pendant phenyl groups (POPESKs) were synthesized and their thermal degradation mechanism was investigated. The POPESKs showed good solubility in various organic solvents and exhibited excellent film-forming property. The polymer films had high transparency and water contact angles in the range of 82.3-94.3 degrees. The overall performance of POPESKs indicated great potential in aerospace, petrochemical, and energy applications.