Process for the solvent-induced crystallization of amorphous poly(etheretherketone)-type polymers and the article formed thereby

摘要

The present invention relates to a process for the solvent- induced crystallization of amorphous poly(etheretherketone)-type polymer to produce an article, which process comprises:PPA. contacting a preformed article of a polymer comprising amorphous poly(etheretherketone)-type polymer with at least one organic compound in its liquid state which consists essentially of atoms of carbon and hydrogen, optionally with oxygen, nitrogen, sulfur, halogen or mixtures thereof having a molecular weight of between about 160 and 320 daltons at a temperature of between about 85° C. and 145° C. for a time effective to crystallize the poly(etheretherketone)-type polymer, PPB. removing the organic compound, andPPC. recovering the article comprising crystallized poly(etheretherketone)- type polymer. Poly(etheretherketone), poly(phenylenesulfide) or mixtures thereof are preferred polymer systems. This process requires a much lower temperature than those necessary to prepare crystallized polymers by thermal annealing procedures. The polymers are useful in dialysis and ultrafiltration. The polymer article having a trace of the organic compound is also described.