| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved process for manufacturing poly(aryl ether ketone)polymer by an aromatic nucleophilic substitution reaction using high purity diphenyl sulfone.SOLUTION: There is provided a method for identifying impurities in diphenyl sulfone having adverse effects on properties of manufactured poly(aryl ether ketone) (for example, one or a plurality of color, melting stability, molecular weight, crystallinity degree and the like) and removing such impurities. There is provided a manufacturing method adapting to at least one of monomethyl diphenyl sulfone content of less than 0.2 area%, monochloro diphenyl sulfone content of less than 0.08 area, Na content of less than 55 ppm, K content of less than 15 ppm, Fe content of less than 5 ppm, diphenyl sulfide content of less than 2.0 wt.%, residual acid content of less than 2.0 μeq/g, water content of less than 0.1 wt.%, total chlorine content of less than 120 ppm, and APHA (25°C) of 20 wt.% solution in acetone of less than 50. |
