Synthesis of branched polyethylene from ethylene stock by an interference-free tandem catalysis of TiCl4/MgCl2 and iron catalyst
作者： Zhicheng Zhang , Zhanxia Lu , Shangtao Chen , Huayi Li , Xiaofan Zhang
DOI: 10.1016/J.MOLCATA.2005.03.046
关键词: Polymerization 、 Polymer chemistry 、 Chemical engineering 、 Branching (polymer chemistry) 、 Ziegler–Natta catalyst 、 Chemistry 、 Polyethylene 、 Side reaction 、 Concurrent tandem catalysis 、 Catalysis 、 Ethylene 、 Physical and Theoretical Chemistry 、 Process Chemistry and Technology
摘要: Abstract An interference-free tandem catalysis based on iron catalyst and TiCl 4 /MgCl 2 , activated by MAO, was used to prepare branched polyethylene polymerization of ethylene. No obvious deactivation due the side reaction catalysts cocatalysts detected during process, which commonly existed in catalytic systems conventional Ziegler–Natta catalysts. A series with different properties have been prepared adjusting temperature, Fe/Ti molar ratio amount MAO used. The alteration oligomers concentration system, changing conditions, led products branching degrees, thus thermal molecular weight. obtained toluene at lower ratios exhibited better morphology than those higher ratios.
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sci-hub.se 参考文章(18)
Zhicheng Zhang, Nannan Cui, Yingying Lu, Yucai Ke, Youliang Hu, Preparation of linear low‐density polyethylene by the in situ copolymerization of ethylene with an iron oligomerization catalyst and rac‐ethylene bis(indenyl) zirconium (IV) dichloride Journal of Polymer Science Part A. ,vol. 43, pp. 984- 993 ,(2005) , 10.1002/POLA.20560
Hang Wang, Zhi Ma, Yucai Ke, Youliang Hu, Synthesis of linear low density polyethylene (LLDPE) by in situ copolymerization with novel cobalt and zirconium catalysts Polymer International. ,vol. 52, pp. 1546- 1552 ,(2003) , 10.1002/PI.1282
Zhibin Ye, Fahad AlObaidi, Shiping Zhu, A Tandem Catalytic System for the Synthesis of Ethylene-Hex-1-ene Copolymers from Ethylene Stock Macromolecular Rapid Communications. ,vol. 25, pp. 647- 652 ,(2004) , 10.1002/MARC.200300162
Yury V. Kissin, David L. Beach, Dual‐functional catalysis for ethylene polymerization to branched polyethylene. II. Kinetics of ethylene polymerization with a mixed homogeneous–heterogeneous Ziegler–Natta catalyst system Journal of Polymer Science Part A. ,vol. 24, pp. 1069- 1084 ,(1986) , 10.1002/POLA.1986.080240601
Zhicheng Zhang, Shangtao Chen, Xiaofan Zhang, Huayi Li, Yucai Ke, Yingying Lu, Youliang Hu, A series of novel 2,6-bis(imino)pyridyl iron catalysts: synthesis, characterization and ethylene oligomerization Journal of Molecular Catalysis A: Chemical. ,vol. 230, pp. 1- 8 ,(2005) , 10.1016/J.MOLCATA.2004.11.028
Liu Zhongyang, Xu Demin, Guo Cunyue, Wang Jun, He Dawei, Hu Youliang, Lldpe prepared byin situ polymerization using a dualfunctional catalytic system of Ti(On-Bu)4 /ALEt3-Et(Ind)2-ZrCl2/MAO Chinese Science Bulletin. ,vol. 46, pp. 2051- 2053 ,(2001) , 10.1007/BF02901130
Zhicheng Zhang, Cunyue Guo, Nannan Cui, Yucai Ke, Youliang Hu, Preparation of linear low‐density polyethylene by in situ copolymerization of ethylene with Zr supported on montmorillonite/Fe/methylaluminoxane catalyst system Journal of Applied Polymer Science. ,vol. 94, pp. 1690- 1696 ,(2004) , 10.1002/APP.21066
Zachary J. A. Komon, Gary M. Diamond, Margarete K. Leclerc, Vince Murphy, Miho Okazaki, Guillermo C. Bazan, Triple tandem catalyst mixtures for the synthesis of polyethylenes with varying structures. Journal of the American Chemical Society. ,vol. 124, pp. 15280- 15285 ,(2002) , 10.1021/JA0283551
Kittichote Musikabhumma, Thomas P. Spaniol, Jun Okuda, Synthesis of branched polyethylenes by the tandem catalysis of silica‐supported linked cyclopentadienyl‐amido titanium catalysts and a homogeneous dibromo nickel catalyst having a pyridylimine ligand Journal of Polymer Science Part A. ,vol. 41, pp. 528- 544 ,(2003) , 10.1002/POLA.10597
Luciano G Furlan, Fábio A Kunrath, Raquel S Mauler, Roberto F de Souza, Osvaldo L Casagrande, Linear low density polyethylene (LLDPE) from ethylene using TpMsNiCl (TpMs = hydridotris(3-mesitylpyrazol-1-yl)) and Cp2ZrCl2 as a tandem catalyst system Journal of Molecular Catalysis A: Chemical. ,vol. 214, pp. 207- 211 ,(2004) , 10.1016/J.MOLCATA.2004.01.002