| 摘要 |
PURPOSE:To obtain an easily washable and dryable polymer having particle size suitable for handling by adding a poor solvent to a solution containing a polymer to form an incompletely coagulated material and adding the material to a poor solvent to complete the coagulation. CONSTITUTION:A poor solvent (e.g. water or methanol) is added to a solution containing a polymer preferably under stirring to form an incompletely coagulated material. The pre-coagulation slurry liquid containing the incompletely coagulated material is added to a poor solvent preferably under stirring to complete the coagulation and precipitation of the polymer, which is separated from the liquid by filtration, centrifugal separation, etc. The polymer used in the present process is preferably a high-polymer composed of aromatic rings bonded with each other through linking groups (e.g. polyaryl sulfone and polycarbonate) and having an intrinsic viscosity of >=0.2. |
