【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。更多还原

【Abstract】 Polymeric kinetics of butadiene initiated with triphenyl phosphate(P)as a ligand to modify MoCl5-Al(OPh)(i-Bu)2(MoP-Al)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 character of this polymerization rate was rapid initiation rate,step propagation and no termination at the initial reaction stage of this polymerization.The rate of polymeriztion was found to be first order with respect to monomer concentration and the apparent activation energy was 44.5 kJ/mol.The result showed that the polymerization activity of MoTPP-Al catalyst system had been improved compared with that of MoCl3(OC8H17)2-Al catalyst system.更多还原