On September 30, 2020, Xia, Jialing; Pu, Zejun; Zheng, Xiaoyi; Hu, Linqing; Zeng, Xianguang; Zhong, Jiachun published an article.HPLC of Formula: 80-07-9 The title of the article was Dielectric properties of polyethersulfone copolymers containing bisphenol S and six fluorine hexafluorobisphenolA (6AF) segments. And the article contained the following:
In this study, a series of fluorinated polyethersulfone (PES-6AF) copolymers with intrinsic low-dielec.-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 (Tg) 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 dielec. property and decrease dielec. constant (k) from 3.6 to 2.5 at 1 kHz. In addition, the dielec. properties were found to be relatively stable until the Tg, it is because that the 6AF units were existed in the mol. backbone. Furthermore, the PES-6AF copolymers were soluble in many common solvents and could be made the molten films using DMF as solvent. The experimental process involved the reaction of 4,4′-Sulfonylbis(chlorobenzene)(cas: 80-07-9).HPLC of Formula: 80-07-9
The Article related to hexafluorobisphenol polyethersulfone copolymer polycondensation thermal dielec property, Chemistry of Synthetic High Polymers: Organic Condensation and Step Polymerization and other aspects.HPLC of Formula: 80-07-9
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