PRODUCTION OF POLY(ARYLENE SULFIDE) POLYMERS CONTAINING REDUCED AMOUNTS OF OLIGOMERS

摘要

A method for removing oligomers and non-polymeric impunities from poly(arylene sulfide) polymers is provided in which a poly(arylene sulfide) polymer associated with oligomers and non-polymeric impunities is contacted with a solvent at a sufficient temperature to substantially dissolve the polymer, oligomers and impurities, then the solution is cooled to a temperature at which the poly(arylene sulfide) precipitates while oligomers and impurities remain in solution, then the precipitated polymer is separated from the solution containing the oligomers and impurities. A polymer product produced by this method is also disclosed.