In this study, a series of fluorinated polyethersulfone (PES-6AF) copolymers with intrinsic low-dielectric-constants are prepared by the introduction of fluorine-containing group, which are derived from the polycondensation reaction of 4,4′-dichlorophenyl sulfone (DCS), bisphenol S (BPS) and six fluorine hexafluorobisphenolA (6AF) compounds by nucleophilic aromatic substitution. Different proportions of PES-6AF copolymers show high glass transition temperatures (T_g) ranging from 206 °C to 230 °C, and the thermal decomposition temperatures of PES-6AF copolymers are up to 500 °C under N₂ atmospheres. The PES-6AF copolymers display outstanding tensile strength (62–69 MPa). Added different proportions of 6AF into the PES-6AF copolymers could improve dielectric property and decrease dielectric constant (k) from 3.6 to 2.5 at 1 kHz. In addition, the dielectric properties were found to be relatively stable until the T_g, it is because that the 6AF units were existed in the molecular backbone. Furthermore, the PES-6AF copolymers were soluble in many common solvents and could be made the molten films using DMF as solvent.

在这项研究中，通过引入含氟基团制备了一系列具有固有低介电常数的氟化聚醚砜（PES-6AF）共聚物，该含氟基团是由4,4'-二氯苯基砜（DCS）的缩聚反应得到的。 ），双酚S（BPS）和六种氟六氟双酚A（6AF）化合物通过亲核芳族取代形成。不同比例的PES-6AF共聚物的玻璃化转变温度（T _g）为206°C至230°C，在N ₂下，PES-6AF共聚物的热分解温度高达500°C。气氛。PES-6AF共聚物显示出出色的拉伸强度（62-69 MPa）。在PES-6AF共聚物中添加不同比例的6AF可以改善介电性能，并在1 kHz时将介电常数（k）从3.6降低至2.5。另外，发现介电性能在T _g之前相对稳定，这是因为在分子主链中存在6AF单元。此外，PES-6AF共聚物可溶于许多普通溶剂，并且可以使用DMF作为溶剂制成熔融膜。