The kinetic study of the anionic polymerization of isoprene is carried out
in tetrahydrofuran(TMF), using n-BuLi as initiator. Kinetic parameters are
obtained, which comprise chain propagation rate constant, k(p) and partial
rate constants, k(3) and k(4) + k(5), propagation orders with respect to mo
nomer and active species concentrations, alpha and-beta, real activation en
ergy, E, as well as partial activation energies, E-3 and E4+5 and so on. Th
e relationship between the microstructure of polyisoprene and the ratio of
[THF]/[n-BuLi] has been investigated. On the basis of the studies mentioned
above, a reasonable mechanism of the anionic polymerization of isoprene in
THF is proposed.