METHOD FOR PREPARING POLY (DIPHENYL ETHER SULFONE) AND POLY (DIPHENYL ETHER DIPHENYL SULFONE) TERNARY POLYMER

摘要

A method for preparing poly(diphenyl ether sulfone) and poly(diphenyl ether diphenyl sulfone) ternary polymer comprises: adding high temperature organic solvent, stirring and heating; sequentially adding 4,4'-dihydroxydiphenyl, 4,4'-dichlorodiphenyl sulfone and 4,4'-dichlorophenyl diphenyl sulfone; after all the monomers are completely dissolved, heating to 100℃ and adding alkali metal carbonate salt-forming agent which is 5-10 mol % more than the amount of 4,4'-dihydroxy diphenyl added, and subsequently adding xylene; continuously heating and salt-forming reaction begins, and controlling the temperature at 190~210℃; then heating to 230~236℃, maintaining for 3-4 hours, finishing polymerization reaction and obtaining polymer viscous liquid; refining and obtaining the ternary polymer.