含氮杂环聚芳醚砜酮羟基化改性及性能

Hydroxylation of poly(phthalazinone ether sulfone ketone) containing phthalazinone moiety and properties

以 Na BH4 为还原剂对含有二氮杂萘酮结构的聚芳醚砜酮 ( PPESK)进行羟基化改性 ,并用 FT-IR和 1H-NMR对还原后的聚芳醚砜酮 ( PPESK— OH)的结构进行表征 .通过测定玻璃化转变温度 ( Tg)、水接触角和溶解性 ,研究还原后聚合物的性能变化 .结果表明 ,随还原程度加深 ,PPESK— OH的 Tg逐渐升高 ,由 52 9.6K升至 571 .3 K,耐热性能有所改善 ;亲水性能增强 ,当还原率为 54.8%时 PPESK— OH的水接触角为 52 .6°;

Poly(phthalazinone ether sulfone ketone) (PPESK) containing the phthalazinone moiety copolymer can be hydroxylated with NaBH 4 in DMAc. The reductive PPESK(PPESK—OH) is fully characterized by FT IR and 1H NMR.The properties of PPESK—OH are shown with the measuring inherent viscosity, contact angle (water), glass transition temperature ( T g ) and solubility in different solvents. The results indicate that the presence of the hydroxyl group significantly enhances the PPESK—OH film wettability; and its T g becomes higher than PPESK′s, which gives it good thermal stability. Nevertheless, the solubility of PPESK—OH has also been changed. It can be soluble in DMAc, NMP, DMF and m cresol, not soluble in chloroform, NB, TCE solvent.