| http://www.w3.org/ns/prov#value | - A further embodiment of the present invention is a solution comprising polyethersulfone and a mixture of two or more compositions selected from the group consisting of acetoacetamides, acetoacetates, lactones, guanidines, piperidones, organic carbonates, phthalates, sulfolane, diones, isophorone, and phosphates.
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