Poly(arylene ether sulfone) containing diphenyl-biphthalazin-dione moieties with excellent thermal resistance

A series of novel poly(arylene ether sulfone)s containing diphenyl-biphthalazin-dione moieties (PPDESs) are synthesized from 4-(4-hydroxyphenyl)-2,3-phthalazin-1-one, 4,4'-dichlorodiphenyl sulfone and diphenylbiphthalazin-dione. Structural analyses such as NMR, FT-IR, instinct viscosity and XRD, as well as property tests including TGA, DSC, DMA, solubility and mechanical properties were carried out on PPDESs. The Tg of PPDESs is up to 388 degrees C, suggesting that PPDESs show excellent thermal resistance. The 5% mass loss temperature (Td5) of PPDESs is up to 513 degrees C. PPDESs possess excellent mechanic and thermo-mechanical performance which Young's modulus above 1.95 GPa, the tensile strength up to 107 MPa and the storage modulus retention up to 51.6% at 300 degrees C. Additionally, PPDESs exhibit an appropriate solubility in organic solvents such as chloroform, 1,1,2,2-tetrachloroethane, N-methyl pyrrolidone and so on. With the increasing introduction of the diphenylbiphthalazin-dione, the thermal resistance and mechanical properties of PPDES are improved, while the solubility is slightly reduced.

Automated summary

A series of novel poly(arylene ether sulfone)s containing diphenyl-biphthalazin-dione moieties (PPDESs) were synthesized. Structural analyses and property tests showed that PPDESs exhibit excellent thermal resistance, mechanical properties, and solubility in organic solvents.