| 摘要 |
PURPOSE: Provided is a method for polymerization of polyethylene terephthalate, which reduces the amount of residual metal catalyst in polymerized chips, and thus gives improved chip qualities and excellent processability in a following spinning step. etc. CONSTITUTION: The method for polymerization of polyethylene terephthalate comprises a step of polycondensation of dimethyl terephthalate with ethylene glycol. In the method, two metal catalyst electrodes formed of metal catalyst components are disposed in a transesterification reactor, wherein each of the electrodes is connected to each of (+) and (-) electric potentials to form metal ions by redox reactions. The metal ions are used as a reaction catalyst. Particularly, the metal catalyst components include Zn, Na, Mn, Mg, Co and Sb.
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