Sequence distribution oriented modeling of ethylene and 1-octene copolymerization process catalyzed by CGC

被引：0
|
作者：
Tian Z. [1 ]
Jiao D. [2 ]
Wang J. [2 ]
Liu B. [3 ]
机构：
[1] Key Laboratory of Advanced Control and Optimization for Chemical Processes, Ministry of Education, East China University of Science and Technology, Shanghai
[2] School of Chemical Engineering, East China University of Science and Technology, Shanghai
[3] School of College of Materials and Energy, South China Agricultural University, Guangzhou
来源：
Huagong Xuebao/CIESC Journal | 2020年 / 71卷 / 02期
关键词：
Kinetic modeling; Polymerization; Polyolefin elastomer; Prediction; Sequence distribution;
D O I：
10.11949/0438-1157.20190930
中图分类号：
学科分类号：
摘要：
Constrained geometry catalyst (CGC) is particularly suitable for the preparation of high performance polyolefin elastomer (POE) using ethylene and α-olefin solution polymerization process. Based on the reaction mechanism of ethylene copolymerization with 1-octene catalyzed by CGC, a kinetic model was established and its kinetic parameters were determined. The kinetic model was validated by the consumption rate of ethylene and catalyst activity. Based on the kinetic model and sequence structure oriented copolymerization mechanism, a sequence distribution model of ethylene and 1-octene copolymerization was established. The model can accurately predict the sequence distribution, the content of short branch chains and their changing trend with reaction conditions. The results show that with the increase of 1-octene concentration, the average sequence length of ethylene decreases gradually and linearly, while the average sequence length of 1-octene increases linearly. The model can provide a theoretical reference for regulating the structure of the POE chain from the perspective of polymerization process. © All Right Reserved.
引用
收藏
页码：651 / 659
页数：8
相关论文
共 30 条
  • [1] Stevens J.C., Neithamer D.R., Metal complex compounds
  • [2] Chum P.S., Swogger K.W., Olefin polymer technologies-history and recent progress at the Dow Chemical Company, Progress in Polymer Science, 33, 8, pp. 797-819, (2008)
  • [3] Li B.G., Zhang M.X., Liu W.F., Et al., Polyolefin elastomers - status and progress, Chemical Industry and Engineering Progress, 36, 9, pp. 3135-3144, (2017)
  • [4] Braunschweig H., Breitling F.M., Constrained geometry complexes-synthesis and applications, Coordination Chemistry Reviews, 250, 21-22, pp. 2691-2720, (2006)
  • [5] Li L.J., Research progress of polyolefin elastomers and their catalytic systems, Elastomers, 5, pp. 88-94, (2015)
  • [6] Tian S., Arredondo V.M., Stern C.L., Et al., Constrained geometry organolanthanide catalysts. synthesis, structural characterization, and enhanced aminoalkene hydroamination/cyclization activity, Organometallics, 18, 14, pp. 2568-2570, (1999)
  • [7] Resconi L., Camurati I., Grandini C., Et al., Indenyl-amido titanium and zirconium dimethyl complexes: improved synthesis and use in propylene polymerization, Journal of Organometallic Chemistry, 664, 1-2, pp. 5-26, (2002)
  • [8] Sakai S., Kojima Y., Theoretical studies on the role of bridging group of CGC type ligands for the Ziegler-Natta catalysis, Journal of Organometallic Chemistry, 694, 20, pp. 3276-3280, (2009)
  • [9] Young M.J., Ma C.-C.M., Polymerization kinetics and modeling of solution PE process with metallocene catalysts, Journal of Polymer Engineering, 22, 2, pp. 75-94, (2002)
  • [10] Wang W.J., Yan D., Zhu S.P., Et al., Kinetics of long chain branching in continuous solution polymerization of ethylene using constrained geometry metallocene, Macromolecules, 31, 25, pp. 8677-8683, (1998)
123