| 摘要 |
<p>A method for producing polytrimethylene terephthalate which comp rises polycondensation of 1,3-propane diol and dimethylterephthalate or terephthalic acid followed by solid state polymerization of the polycondensation reaction product to increase the intrinsic viscosity, which comprises quenching the solid state polymerization product in water at a temperature of from 0 to 18°C followed by pelletization of the quenched product.</p> |
