| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing a polycarbonate excellent in thermal stability substantially free from a residual solvent. SOLUTION: In a method for producing a polycarbonate by solid-phase polymerization using a polycarbonate prepolymer, the method for producing the polycarbonate is specified by that after the polycarbonate prepolymer is crystallized by contacting it with liquid, subcritical or supercritical state carbon dioxide. The polycarbonate is produced by solid-phase polymerization of the prepolymer.</p> |
