| Publication Type |
Journal Article |
| Title |
Ethylene polymerisation with zirconocene supported in Al-modified MCM-41: Catalytic behaviour and polymer properties |
| Authors |
Joao M. Campos M R Ribeiro João P. Lourenço A Fernandes |
| Groups |
CATHPRO |
| Journal |
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL |
| Year |
2007 |
| Month |
November |
| Volume |
277 |
| Number |
1 |
| Pages |
93-101 |
| Abstract |
Heterogeneous olefin polymerisation catalysts were prepared by combining zirconocene with a series of purely siliceous and Al-containing MCM-41 supports with different Si/AI ratios, using simplified and improved versions of the well-known direct impregnation and MAO pre-treatment methods. The catalysts were tested in ethylene polymerisation. Analysis of polymerisation activities and kinetic profiles led to a rationalisation on the effect of support Si/Al ratios and methods used for catalyst preparation over the catalytic behaviour for ethylene polymerisations. Polymers were characterised by scanning electron microscopy and differential scanning calorimetry. A mechanism is proposed to associate the formation or absence of fibrous morphology with polymerisation activities. (c) 2007 Elsevier B.V. All rights reserved. |
| DOI |
http://dx.doi.org/10.1016/j.molcata.2007.07.026 |
| ISBN |
|
| Publisher |
|
| Book Title |
|
| ISSN |
1381-1169 |
| EISSN |
|
| Conference Name |
|
| Bibtex ID |
ISI:000250983200012 |
| Observations |
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