摘要
合成了几个系列的无毒无污染环境友好的新型无锑催化剂,并应用于聚酯合成反应动力学的研究,衡量其催化效果.研究发现,新型无锑催化剂在PET的合成中,无论对酯化反应还是缩聚反应,均表现出较高的反应活性,可大大加速PET合成反应的进行.在同样的反应条件下,就酯化反应而言,加入自制催化剂的反应与不加催化剂的反应(并不是没有催化剂参与反应,应该是体系中的H^+自催化)相比,酯化反应时间可缩短20％～50％,酯化反应的活化能有较大幅度的降低;而就缩聚反应而言,加入自制催化剂的反应与加入常规催化剂Sb_2O_3的反应相比,所得产物不仅粘度高,而且缩聚反应速度常数大多数可提高2倍以上,缩聚反应时间亦可缩短40％～70％.
Prepared a series of new nontoxic and unpolluted antimony-free catalysts and evaluated
the catalytic effectiveness by the reaction kinetics of PET. The kinetics results show that the new
antimony-free catalysts exhibit high effectiveness both in esterification and polycondensation.
Compared to that without catalyst, the esterification time with self-made catalysts is shortened by
20 %～50 %, the activation energy decreases significantly. And the polycondensation reaction rate
constant with self-made catalysts is 2～3 times of that with traditional Sb_2O_3 catalyst, the poly-
condensation time is shortened by 40 %～70 %.
出处
《北京服装学院学报（自然科学版）》
CAS
2004年第2期22-28,共7页
Journal of Beijing Institute of Fashion Technology：Natural Science Edition
关键词
聚酯
酯化
缩聚
反应动力学
催化剂
polyester
esterification
polycondensation
reaction kinetics
catalysts
