A preparation method for well-defined crystallites of Mgcl2-supported Ziegler-Natta catalysts and their observation by AFM and SEM

被引：49
作者：
Andoni, Adelaida
Chadwick, John C.
Niemantsverdriet, Hans J. W.
Thuene, Peter C.
机构：
[1] Eindhoven Univ Technol, Schuit Inst Catalysis, NL-5600 MB Eindhoven, Netherlands
[2] DPI, NL-5600 AX Eindhoven, Netherlands
[3] Eindhoven Univ Technol, Polymer Chem Lab, NL-5600 MB Eindhoven, Netherlands
来源：
MACROMOLECULAR RAPID COMMUNICATIONS | 2007年 / 28卷 / 14期
关键词：
atomic force microscopy (AFM); morphology; preparation method; scanning electron microscopy; Ziegler-Natta polymerization;
D O I：
10.1002/marc.200700222
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A method for the preparation of well-defined crystallites of MgCl2-supported Ziegler-Natta catalysts on Si wafers has been developed. This has been achieved by the spin-coating of a MgCl2 solution onto a flat Si wafer, followed by controlled crystal growth to give well-defined MgCl2 . nEtOH crystallites. The growth of the crystallites on the flat silica facilitates their characterization using electron and scanning probe microscopy. The relative proportions of 120 degrees and 90 degrees edge angles indicate the preference for the formation of a particular crystallite face for the MgCl2. Polyethylene has been identified to be formed on the lateral faces of the crystallite.
引用
收藏
页码：1466 / 1471
页数：6
相关论文
共 23 条
  • [1] Albizzati E., 2005, POLYPROPYLENE HDB
  • [2] Introducing a new surface science model for Ziegler-Natta catalysts:: Preparation, basic characterization and testing
    Andoni, Adelaida
    Chadwick, John C.
    Milani, Stefania
    Niemantsverdriet, Hans
    Thune, Peter C.
    [J]. JOURNAL OF CATALYSIS, 2007, 247 (02) : 129 - 136
  • [3] Experimental and calculated vibrational spectra and structure of Ziegler-Natta catalyst precursor:: 50/1 comilled MgCl2-TiCl4
    Brambilla, L
    Zerbi, G
    Nascetti, S
    Piemontesi, F
    Morini, G
    [J]. MACROMOLECULAR SYMPOSIA, 2004, 213 : 287 - 301
  • [4] Structure of MgCl2-TiCl4 complex in co-milled Ziegler-Natta catalyst precursors with different TiCl4 content:: Experimental and theoretical vibrational spectra
    Brambilla, Luigi
    Zerbi, Giuseppe
    Piemontesi, Fabrizio
    Nascetti, Stefano
    Morini, Giampiero
    [J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2007, 263 (1-2) : 103 - 111
  • [5] BUSICO V, 1985, MAKROMOL CHEM, V186, P1279
  • [6] CORRADINI P, 1988, TRANSITION METALS OR, P337
  • [7] Giannini U., 1981, MAKROMOL CHEM S, V5, P216
  • [8] Guttman J. Y., 1968, MACROMOLECULES, V1, P461
  • [9] MECHANISM OF PROPYLENE POLYMERIZATION ON SINGLE CRYSTALS OF ALPHA-TITANIUM TRICHLORIDE
    GUTTMAN, JY
    GUILLET, JE
    [J]. MACROMOLECULES, 1970, 3 (04) : 470 - &
  • [10] HARGITAY B, 1959, J POLYM SCI, V35, P359
123