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 |
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Publisher |
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Book Title |
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ISSN |
1381-1169 |
EISSN |
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Conference Name |
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Bibtex ID |
ISI:000250983200012 |
Observations |
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