摘要
利用磷酸三苯酯(TPP)和五氯化钼(MoCl5)配位得到主催化剂(MoTPP),与苯酚取代的三异丁基铝(Al)组成催化体系(MoTPP-Al)催化制备1,2-聚丁二烯(1,2-PB)橡胶。通过对MoTPP-Al体系的动力学实验求得反应速率常数、反应活化能等。结果表明,含TPP体系在聚合反应初期属快引发、逐步增长、无终止的聚合反应体系,聚合速率对单体浓度呈一级动力学关系,表观活化能为Ea=44.5kJ/mol,与辛醇取代的MoCl5-Al体系(Ea=51.7kJ/mol)相比,前者的聚合活性高。
Polymeric kinetics of butadiene initiated with triphenyl phosphate（P）as a ligand to mod- ify MoCls-AI（OPh）（i-Bu）2 （MoP-A1）catalyst system were investigated. The kinetics constants such as reaction rate（K）and activation energy（Ea）, had also been derived. The results showed that the charac- ter of this polymerization rate was rapid initiation rate, step propagation and no termination at the ini- tial reaction stage of this polymerization. The rate of polymeriztion was found to be first order with re- spect to monomer concentration and the apparent activation energy was 44. 5 kJ/mol. The result showed that the polymerization activity of MOTpp-A1 catalyst system had been improved compared with that of MoC13 （OCsH17）2-A1 catalyst system.
出处
《弹性体》
CAS
2013年第1期1-4,共4页
China Elastomerics
基金
国家自然科学基金资助项目(50603009)
关键词
1
2-聚丁二烯
磷酸三苯酯
钼化合物
配位聚合
1,2-polybutadiene
triphenyl phosphate
molybdenum-base catalyst
coordination poly-merization
