聚酯熔体输送过程中齐聚物含量的变化

Change of oligomer content during polyester melt transfer course

研究了聚酯熔体在螺杆输送、管道输送过程中及静态高温状态下齐聚物含量的变化。结果表明:时间和温度是影响齐聚物生成的主要因素。在一定的螺杆转速下,温度越高,停留时间越长,聚酯熔体输送过程中齐聚物含量越高。生产中可调节熔体停留时间和温度控制聚酯熔体中的齐聚物含量。

The change of oligomer content was analyzed at static high-pressure state during polyester melt transfer course in screw extruder and pipes. The results showed that time and temperature was the crucial factors affecting the oligomer formation. The higher the temperature and the longer the resident time was, the higher the oligomer content was during polyester melt transfer course at a fixed screw rotation speed. The oligomer content can be controlled by moderating the melt resident time and temperature during the production.