METHOD FOR PRODUCING CYCLIC POLYARYLENE SULFIDE MIXTURE

摘要

PROBLEM TO BE SOLVED: To provide a method for efficiently producing a cyclic polyarylene sulfide mixture from a mixture of a linear polyarylene sulfide with a cyclic polyarylene sulfide.

SOLUTION: The cyclic polyarylene sulfide mixture is efficiently obtained in high purity by bringing the polyarylene sulfide mixture containing at least (a) the linear polyarylene sulfide and (b) the cyclic polyarylene sulfide into contact with a solvent dissolving the cyclic polyarylene sulfide, preparing a solution containing the cyclic polyarylene sulfide and then removing the solvent from the solution. The resultant cyclic polyarylene sulfide is a mixture having 4-50 number of repeating units of the arylene sulfides.

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