Jabil Inc.
SEMICRYSTALLINE PULVERULENT POLYARYLETHERSULFONES AND METHOD TO MAKE THEM

Abstract:

A semicrystalline polyarylethersulfone (PAES) useful for additive manufacturing may be made by a method comprising: dissolving an amorphous polyarylethersulfone in a polar aprotic halogenated hydrocarbon solvent at a temperature adequate to effectively form a solution, and subsequently and spontaneously bring about reprecipitation of a semicrystalline polyarylethersulfone from the solution. The semicrystalline polyarylethersulfone may have a crystallinity of at least 30% by weight. The semicrystalline PAES, upon being heated, melting and uniting together in layers during additive manufacturing cools without substantially recrystallizing, allows for deformation-free articles to be formed having low residual stress.