KINETIC STUDY ON THE POLYMERIZATION OF BUTADIENE WITH LnCl3-C2H5OH-AlR3 CATALYSTS Ⅱ.Determination of the Chain Transfer Rate Constants and the Mechanism of Deaetivation
PAN En-li, ZHOU Chang-yu, HU Jing-yu. KINETIC STUDY ON THE POLYMERIZATION OF BUTADIENE WITH LnCl3-C2H5OH-AlR3 CATALYSTS Ⅱ.Determination of the Chain Transfer Rate Constants and the Mechanism of Deaetivation[J]. Acta Polymerica Sinica, 1985,(3):161-166.
PAN En-li, ZHOU Chang-yu, HU Jing-yu. KINETIC STUDY ON THE POLYMERIZATION OF BUTADIENE WITH LnCl3-C2H5OH-AlR3 CATALYSTS Ⅱ.Determination of the Chain Transfer Rate Constants and the Mechanism of Deaetivation[J]. Acta Polymerica Sinica, 1985,(3):161-166.DOI:
The rate constants of chain transfer in the polymerization of butadiene with LnCl3-C2H5OH-AlR3 catalysts (Ln=La
Nd
Sm
Gd
Dy
Ho or Y; AlR3 =AT(C2H5)3 or Al(i-C4H9)3) Were evaluated. Analogous to the propagation rate constants described in the early paper these rate constants varies also with the rare earth element used in the catalysts and decreases in the same order. The kinetic study showed that the deactivation of active center initiated with Sm-catalyst was second order. Besides
the mechanism of deactivation of active center has been proposed for the present polyme-rization system.