In situ copolymerization of ethylene to linear low-density polyethylene (LLDPE) with calcosilicate (CAS-1) supported dual-functional catalytic system
作者： Hong Xu , Cun-Yue Guo , Mingge Zhang , Hai-Jian Yang , Jinxiang Dong
DOI: 10.1016/J.CATCOM.2007.04.030
关键词:
摘要: Calcosilicate (CAS-1) was used for the first time as an effective carrier simultaneous immobilization of a dual-functional catalytic system consisted iron-based bis(imino) pyridyl complex (O) and zirconocene compound (C) to form heterogeneous catalyst precursor (CAS-1/O/C). The a-olefins formed O-catalyzed ethylene oligomerization copolymerized in situ with linear low-density polyethylene (LLDPE) under catalysis C CAS-1/O/C upon addition cocatalysts described hereafter. Instead methylaluminoxane (MAO), triethylaluminum (TEA) employed activate copolymerization reaction high activities smooth kinetic process. Experimental results reflected that selectivity lower improved due confinement effect layered structures CAS-1, hence greatly increasing incorporation rate into LLDPE main chains branching degree accordingly during ethylene. structure CAS-1 endowed resultant thermal stability higher molecular weights (Mn). � 2007 Elsevier B.V. All rights reserved.
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sci-hub.se 参考文章(23)
Walter Kaminsky, Florian Renner, High melting polypropenes by silica‐supported zirconocene catalysts Die Makromolekulare Chemie, Rapid Communications. ,vol. 14, pp. 239- 243 ,(1993) , 10.1002/MARC.1993.030140404
George J. P. Britovsek, Vernon C. Gibson, Stuart J. McTavish, Gregory A. Solan, Andrew J. P. White, David J. Williams, George J. P. Britovsek, Brian S. Kimberley, Peter J. Maddox, Novel olefin polymerization catalysts based on iron and cobalt Chemical Communications. pp. 849- 850 ,(1998) , 10.1039/A801933I
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
Jun Wang, Zhongyang Liu, Cunyue Guo, Yongjun Chen, Dong Wang, Preparation of a PE/MT Composite by Copolymerization of Ethylene with In‐Situ Produced Ethylene Oligomers under a Dual Functional Catalyst System Intercalated into MT Layer Macromolecular Rapid Communications. ,vol. 22, pp. 1422- 1426 ,(2001) , 10.1002/1521-3927(20011101)22:17<1422::AID-MARC1422>3.0.CO;2-V
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
José Luis Jordá, Sinisa Prokic, Lynne B. McCusker, Christian Baerlocher, Chun Feng Xue, Jinxiang Dong, Synthesis and structure analysis of the potassium calcium silicate CAS-1. Application of a texture approach to structure solution using data collected in transmission mode Comptes Rendus Chimie. ,vol. 8, pp. 331- 339 ,(2005) , 10.1016/J.CRCI.2004.11.015
Adams Tidjani, Charles A. Wilkie, Photo-oxidation of polymeric-inorganic nanocomposites: chemical, thermal stability and fire retardancy investigations Polymer Degradation and Stability. ,vol. 74, pp. 33- 37 ,(2001) , 10.1016/S0141-3910(01)00061-1
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
Young Soo Ko, Taek Kyu Han, Je Woo Park, Seong Ihl Woo, Propene polymerization catalyzed over MCM-41 and VPI-5-supported Et(ind)2ZrCl2 catalysts Macromolecular Rapid Communications. ,vol. 17, pp. 749- 758 ,(1996) , 10.1002/MARC.1996.030171101