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

Abstract

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 diphenyl-biphthalazin-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 °C, suggesting that PPDESs show excellent thermal resistance. The 5% mass loss temperature (Td5) of PPDESs is up to 513 °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 °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 diphenyl-biphthalazin-dione, the thermal resistance and mechanical properties of PPDES are improved, while the solubility is slightly reduced.