A series of copoly(aryl ether sulfone)s containing double-decker-shaped silsesquioxane (DDSQ) in the main chain was prepared. Toward this end, a novel diphenol polyhedral oligomeric silsesquioxane macromer was synthesized by hydrosilylation between 3,13-dihydro octaphenyl double-decker silsesquioxane (denoted dihydro DDSQ) and eugenol. The poly(aryl ether sulfone)s were synthesized from diphenol DDSQ, bisphenol A (BPA), and 4-fluorophenyl sulfone using a onestep high-temperature solution method. By adjusting the ratio of diphenol DDSQ to BPA, copolymers with variable DDSQ content in the main chains were obtained. With increased DDSQ content in the main chain, the glass transition temperature decreased based on differential scanning calorimetry, and anti-degradation was enhanced based on thermogravimetric analysis. Moreover, the dielectric constant j of pure polymer (3.19 at 1 MHz) initially increased to 4.04 (DDSQ molar ratio 5 10%), and then decreased to 2.68 at 1 MHz (DDSQ molar ratio 5 100%). Crystallization behavior, solubility, and surface hydrophobicity were also investigated. V C 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 780-788

A series of phosphorus-containing polyimide–POSS nanocomposites were synthesized, phosphorus and POSS synthetic self-passivating layers were formed to protect the underlying material from AO attack.