[1] Luo Zhenghong, Huang Kai, Cao Zhikai,. Study on kinetics of propylene polymerizationat different temperatures via Monte Carlo simulation [J]. Journal of Southeast University (English Edition), 2006, 22 (1): 117-120. [doi:10.3969/j.issn.1003-7985.2006.01.025]

Copy

Study on kinetics of propylene polymerizationat different temperatures via Monte Carlo simulation()

Share：

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

22

Issue:

2006 1

Page:

117-120

Research Field:

Chemistry and Chemical Engineering

Publishing date:

2006-03-20

Info

Title:

Study on kinetics of propylene polymerizationat different temperatures via Monte Carlo simulation

Author(s):

Luo Zhenghong¹;  Huang Kai²;  Cao Zhikai¹

¹Department of Chemical and Biochemical Engineering, Xiamen University, Xiamen 361005, China
²Department of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, China

Keywords:

Monte Carlo simulation;  propylene polymerization;  kinetics;  polymerization temperature

PACS:

TQ316.3

DOI:

10.3969/j.issn.1003-7985.2006.01.025

Abstract:

The elementary reactions of propylene polymerization catalyzed by conventional Ziegler-Natta catalysts was proposed according to the comprehensive view and without considering the effect of any impurity in the material on propylene polymerization.The Monte Carlo simulation technique was employed to investigate the kinetics of propylene polymerization in order to determine the validity of the stationary state assumption and the effects of the polymerization temperature on the polymerization.The simulated total amount of active species, which only increases quickly at the beginning of the polymerization, indicates that the stationary state assumption in the studied system is valid.Moreover, significant effects of polymerization temperature on the polymerization conversion, and the molecular weight and its distribution were also analyzed.The simulated results show that the consumption rate of propylene increases with the increase of polymerization temperature;the maximum values of the number-average degree of polymerization are constant at different polymerization temperatures, however, the peak appears earlier with the higher temperature;as the polymerization temperature increases, the average molecular weight decreases and the molecular weight distribution changes greatly.

References:

[1] Matos V, Neto A G M, Pinto J C.Method for quantitative evaluation of kinetic constants in olefin polymerizations.Ⅰ.Kinetic study of a conventional Ziegler-Natta catalyst used for propylene polymerizations [J].Journal of Applied Polymer Science, 2001, 79(11):2076-2108.
[2] Matos V, Neto A G M, Nele M, et al.Method for quantitative evaluation of kinetic constants in olefin polymerizations.Ⅱ.Kinetic study of a high-activity Ziegler-Natta catalyst used for bulk propylene polymerizations [J].Journal of Applied Polymer Science, 2002, 86(13):3226-3245.
[3] Zacca J J, Debling J A, Ray W H.Reactor residence-time distribution effects on the multistage polymerization of olefins.2.Polymer properties:bimodal polypropylene and linear low-density polyethylene [J].Chemical Engineering Science, 1997, 52(12):1941-1967.
[4] Zacca J J, Debling J A, Ray W H.Reactor residence-time distribution effects on the multistage polymerization of olefins.3.Multi layered products: impact polypropylene [J].Chemical Engineering Science, 1997, 52(12):1969-2001.
[5] Zacca J J, Ray W H.Modelling of the liquid phase polymerization of olefins in loop reactors [J].Chemical Engineering Science, 1993, 48(22):3743-3765.
[6] Chaves E G, Marques M F V.Effect of experimental conditions on propylene polymerization with ethylene(fluorenyl)(cyclopentadienyl)zirconium dichloride/methylaluminoxane catalyst system [J].European Polymer Journal, 2001, 37(6):1175-1180.
[7] Luo Z H, Li J, Zhan X L, et al.Monte Carlo simulation of solid phase graft polymerization of acrylic acid onto polypropylene [J].Journal of Chemical Engineering of Japan, 2004, 37(6):737-743.
[8] Ling J, Zhang Y F, Shen Z Q, et al.Kinetics simulation of high viscous styrene bulk polymerization system [J].European Polymer Journal, 2001, 37(12):2407-2411.
[9] Liang H J, Li F H, He X H, et al.Monte Carlo simulation for the modification of polymer via grafting [J].European Polymer Journal, 2000, 36(8):1613-1617.
[10] Choi K H, Ray W H.Polymerization of olefins through heterogeneous catalysis.Ⅱ.Kinetics of gas phase propylene polymerization with Ziegler-Natta catalysts [J].Journal of Applied Polymer Science, 1985, 30(3):1065-1081.

Memo

Memo:

Biography: Luo Zhenghong(1972—), male, doctor, luozh@xmu.edu.cn.

Common functions