以n-BuLi/TMEDA(四甲基乙二胺)为金属化试剂,环己烷为溶剂,研究了1,2-结构和1,4-结构分别为98％和92％的聚丁二烯(PB)在70℃时的锂化反应动力学。结果表明,PB的初始锂化反应速度与[n-BuLi]和[PB]的一次幂成正比:对高1,2-结构PB,K_p=(αk_(0.5)+βk_1)×[PB][n-BuLi],k_(0.5)/k_1=0.78,反应活化能为54.0 kJ/mol;当两种结构PB存在,[TMEDA]/[n-BuLi]_0>1时,K_p(ak_(1.2)+b_(1.4))[PB][n-BuLi];1,4-结构PB的锂化反应活性高于1,2-结构PB。 Using n-BuLi / TMEDA (tetramethylethylenediamine) as the metalization reagent and cyclohexane as the solvent, the polybutadiene with 98% and 92% 1,4-structure and 1,2-structure (PB) at 70 ℃ lithiation reaction kinetics. The results show that the initial lithiation rate of PB is proportional to the first power of [n-BuLi] and [PB]: For the high 1,2 structure BP, Kp = (αk_ (0.5) + βk_1) × [PB] The reaction activation energy was 54.0 kJ / mol for the two structures PB [a-1], k_ (0.5) /k_1=0.78, + b_ (1.4)) [PB] [n-BuLi]; The 1,4-structure PB has higher lithiation reactivity than the 1,2-structure PB.