论文部分内容阅读
在聚对苯二甲酸乙二酯(以下简称PET-译者)成乙醛和醚(二甘醇)的过程,以及聚酯的热降解,这两种过程对聚合物和纤维的质量都是有害的。乙醛和二甘醇的生成从图1可看出,加热纯乙二醇时,在较高的温度条件下会生成水。在乙二醇中加入合成聚酯的催化剂,能促使生成更多的水。在280℃、反应时间6小时、催化剂用量为5×10~(-4)克分子/克分子乙二醇的条件合成时所发生的副反应中,主要是生
In polyethylene terephthalate (PET-translator) into acetaldehyde and ether (diethylene glycol) process, as well as polyester thermal degradation, both of the quality of the polymer and fiber are Harmful. Formation of Acetaldehyde and Diethylene Glycol As can be seen from Figure 1, heating of pure ethylene glycol produces water at higher temperatures. The addition of a synthetic polyester catalyst to ethylene glycol can encourage the production of more water. In the side reaction at 280 ° C, the reaction time of 6 hours and the catalyst amount of 5 × 10 -4 mol / mol of ethylene glycol,