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A comparative study of ethylene polymerization by bis(aminotropone) Ti catalysts

✍ Scribed by Mohammad Taghi Goldani; Reza Sandaroos; Ali Mohmmadi; Maryam Goharjoo


Publisher
Springer
Year
2011
Tongue
English
Weight
569 KB
Volume
68
Category
Article
ISSN
0170-0839

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## Abstract Summary: The number of active centers (__C__~P~) and propagation rate constants (__k__~P~) for polymerization of ethylene with supported catalysts LFeCl~2~/SiO~2~, LFeCl~2~/Al~2~O~3~ and LFeCl~2~/MgCl~2~ (L = 2,6‐(2,6‐(Me)~2~C~6~H~3~Nο£ΎCMe)~2~C~5~H~3~N), activated by an Al(__i__‐Bu)~3~ c

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X-ray photoelectron spectroscopy (XPS) has been applied to the study of a series of metaliocene catalysts, containing Zr, Ti or Hf. for the polymerization of ethylene. Surface atomic compositions, binding energies and valence band (VB) spectra have been measured. Surface compositions were found to b