钛系聚酯催化剂催化活性的影响因素研究  

Influential factors on catalytic activity of titanium catalyst for polyester

作　　者：章瑛虹[1] 

机构地区：[1]上海石油化工研究院,上海201208

出　　处：《合成纤维工业》2012年第4期8-11,共4页China Synthetic Fiber Industry

基　　金：中国石油化工集团公司项目(207020)

摘　　要：以二氧化钛(TiO2)为消光剂,采用钛系催化剂STiC-01或锑系催化剂乙二醇锑,在2 L间歇式聚合反应釜中制备半消光PET切片。根据PET切片的特性黏数和色度(L值及b值),比较了催化剂的催化活性,并研究了催化活性的影响因素。结果表明:在相同的聚合工艺条件下,STiC-01的钛用量为5μg/g(相对于PET质量)时的催化活性与乙二醇锑的锑用量为250μg/g(相对于PET质量)时的相当,PET切片的特性黏数达0.676 dL/g,钛系PET切片的L值高于锑系PET的,b值相当;磷化合物和镁化合物的用量应适当控制;催化剂在酯化前加入,TiO2在酯化后加入,STiC-01的催化活性不受TiO2的影响;相比乙二醇锑,STiC-01的催化活性受原料质量的影响小。Using titanium catalyst STiC-01 or an antimony catalyst of ethylene glycol antimony, a semi-dull PET chip was produced on a 2 L batch polymerization reactor with titanium dioxide （TiO2 ） as a flatting agent. The catalytic activity of these two catalysts were compared according to polyester chips with different intrinsic viscosity and brightness （ L value and b value）. The influential factors on the catalytic activity were studied. The results showed that the catalytic activity of STiC- 01 with 5 p.g/g titanium based on polyester mass was equal to that of ethylene glycol antimony with 250 μg/g antimony based on polyester mass under the same polymerization conditions, the intrinsic viscosity of polyester chips reached 0. 676 dL/g, and titanium catalyst contributed higher L value and equal b value as compared with antimony catalyst; the amount of phosphorus and magnesium compounds should be rationally controlled; the catalysts should be added before esterificatian, but TiO2 after esteification, and the catalytic activity of STiC-01 was not influenced by TiO2 ; as compared with ethylene glycol antimony, STiC-01 had the catalytic activity less affected by raw material quality.

关 键 词：聚酯 二氧化钛 钛系催化剂 乙二醇锑 催化活性 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]