User menu

Accès à distance ? S'identifier sur le proxy UCLouvain

Characterization of a model Phillips catalyst by mass spectrometry.

Primary tabs

Di Croce, Pascal Gabriel Aubriet, Frédéric Chéty-Gimondo, Rachel Muller, Jean-François Grange, Paul

A model Phillips catalyst for ethylene polymerization, prepared by spin coating a Cr(III)(Cr(acac)3) precursor on a silicon wafer, was submitted to an oxidative activation. Laser ablation Fourier transform mass spectrometry provided direct information on molecular species at the silicon wafer surface during activation. At 350 degrees C the chromium precursor was degraded, while chromium oxide species were formed. The chromium concentration decreased with temperature. The activated model catalyst was active for ethylene polymerization. Using complementary techniques (Fourier transform infrared spectroscopy, laser desorption/ionization mass spectrometry), the polymer was identified as crystalline polyethylene. After 1 h of polymerization at 160 degrees C, dome-like structures were observed by atomic force microscopy. Their morphologies were constituted of regions of parallel aligned lamellae of polymer.

Document type Article de périodique (Journal article) – Journal Article, Research Support, Non-U.S. Gov't
Publication date 2004
Journal information "Rapid communications in mass spectrometry : RCM" - Vol. 18, no. 6, p. 601-8 (2004)
Peer reviewed yes
issn 0951-4198
Publication status Publié
Affiliation UCL
MESH Subject Catalysis ; Crystallization ; Ethylenes - analysis - chemistry ; Microscopy, Atomic Force - methods ; Models, Chemical ; Polyethylene - analysis ; Polymers - analysis - chemistry ; Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization - methods ; Spectroscopy, Fourier Transform Infrared - methods ; Surface Properties
Links
  1. Niemantsverdriet, Appl. Surf. Sc., 144/145, 366 (1999)
  2. Gunter, Catal. Rev. Sci. Eng., 39, 77 (1997)
  3. Somorjai, J. Phys. Chem. B, 104, 2969 (2000)
  4. Somorjai, Surf. Sci., 345, 1 (1996)
  5. Kim, J. Catal., 193, 171 (2000)
  6. de Jong, J. Phys. Chem., 97, 6477 (1993)
  7. Weckhuysen, Chem. Rev., 96, 3327 (1996)
  8. McDaniel, Adv. Catal., 33, 47 (1985)
  9. Hogan, J. Polym. Sci. Part A: Polym. Chem., 8, 2637 (1970)
  10. McDaniel, J. Catal., 82, 98 (1983)
  11. McDaniel, J. Catal., 67, 71 (1981)
  12. Myers, J. Catal., 92, 260 (1985)
  13. Weckhuysen, Catal. Today, 51, 215 (1999)
  14. Weist, Macromolecules, 20, 689 (1987)
  15. Krauss, J. Mol. Catal., 46, 97 (1988)
  16. Thüne, J. Phys. Chem. B, 101, 8559 (1997)
  17. Thüne, J. Catal., 183, 1 (1999)
  18. Thüne, J. Phys. Chem. B, 105, 3073 (2001)
  19. Loos, Macromolecules, 32, 8910 (1999)
  20. Di Croce, Stud. Surf. Sci., 143, 823 (2002)
  21. Struyf, J. Am. Soc. Mass Spectrom., 9, 482 (1998)
  22. Aubriet, J. Phys. Chem. A, 106, 6053 (2002)
  23. Hachimi, Int. J. Mass Spectrom. Ion Processes, 144, 23 (1995)
  24. Aubriet, Int. J. Mass Spectrom., 198, 189 (2000)
  25. Lafargue, J. Mass Spectrom., 31, 623 (1996)
  26. Watanabe, J. Appl. Polym. Sci., 64, 1203 (1997)
  27. Dobney, Anal. Chim. Acta, 423, 9 (2000)
  28. Chen, J. Am. Soc. Mass Spectrom., 12, 1186 (2001)
  29. Chen, J. Am. Soc. Mass Spectrom., 12, 367 (2001)
  30. Kahr, J. Am. Soc. Mass Spectrom., 4, 453 (1993)
  31. Aubriet, Int. J. Mass Spectrom., 219, 717 (2002)
  32. Aubriet, Int. J. Mass Spectrom., 209, 5 (2001)
  33. Ghiotti, J. Mol. Catal., 46, 61 (1988)
  34. Zielinski, J. Catal., 137, 368 (1992)
  35. Kantcheva, J. Catal., 154, 329 (1995)
  36. Matsumoto, Rapid Commun. Mass Spectrom., 17, 678 (2003)
  37. Babich, J. Coll. Interf. Sci., 189, 144 (1997)
  38. Plyuto, Appl. Surf. Sci., 140, 176 (1999)
  39. Hakuli, Phys. Chem. Chem. Phys., 1, 1607 (1999)
  40. Liu, J. Mol. Catal A: Chem., 172, 227 (2001)
  41. Fouad Nasr E., Knözinger Helmut, Zaki Mohamed I., Chromia on Silica and Alumina Catalysts: Temperature-Programmed Reduction and Structure of Surface Chromates, 10.1524/zpch.1994.186.part_2.231
  42. Harrison, Phys. Chem. B, 102, 10672 (1998)
  43. Chen, J. Am. Soc. Mass Spectrom., 12, 1186 (2001)
  44. Srinivasan, Chem. Rev., 89, 1303 (1989)
  45. Ruddick, J. Phys. Chem. B, 102, 2991 (1998)
Bibliographic reference Di Croce, Pascal Gabriel ; Aubriet, Frédéric ; Chéty-Gimondo, Rachel ; Muller, Jean-François ; Grange, Paul. Characterization of a model Phillips catalyst by mass spectrometry.. In: Rapid communications in mass spectrometry : RCM, Vol. 18, no. 6, p. 601-8 (2004)
Permanent URL http://hdl.handle.net/2078.1/9782