Polypropylene obtained through zeolite supported catalysts
Propylene polymerizations were carried out with f2C(Flu)(Cp)ZrCl2 and SiMe2(Ind)2ZrCl2 catalysts supported on silica, zeolite sodic mordenite (NaM) and acid mordenite (HM). The polymerizations were performed at different temperatures and varying aluminium/zirconium molar ratios ([Al]/[Zr]). The effe...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Polímeros
2004-01-01
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| Series: | Polímeros |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000400010 |
| _version_ | 1818115393503363072 |
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| author | Queli C. Bastos Maria de Fátima V. Marques |
| author_facet | Queli C. Bastos Maria de Fátima V. Marques |
| author_sort | Queli C. Bastos |
| collection | DOAJ |
| description | Propylene polymerizations were carried out with f2C(Flu)(Cp)ZrCl2 and SiMe2(Ind)2ZrCl2 catalysts supported on silica, zeolite sodic mordenite (NaM) and acid mordenite (HM). The polymerizations were performed at different temperatures and varying aluminium/zirconium molar ratios ([Al]/[Zr]). The effect of these reaction parameters on the catalyst activity was investigated using a proposed statistical experimental planning. In the case of f2C(Flu)(Cp)ZrCl2, SiO2 and NaM were used as support and the catalyst performance evaluated using toluene and pentane as polymerization solvent. The molecular weight, molecular weight distribution, melting point and crystallinity of the polymers were examined. The results indicate very high activities for the syndiospecific heterogeneous system. Also, the polymers obtained had superior Mw and stereoregularity. |
| first_indexed | 2024-12-11T04:05:55Z |
| format | Article |
| id | doaj.art-0a566464fe9442bc9608edd54e9e034f |
| institution | Directory Open Access Journal |
| issn | 0104-1428 1678-5169 |
| language | English |
| last_indexed | 2024-12-11T04:05:55Z |
| publishDate | 2004-01-01 |
| publisher | Associação Brasileira de Polímeros |
| record_format | Article |
| series | Polímeros |
| spelling | doaj.art-0a566464fe9442bc9608edd54e9e034f2022-12-22T01:21:31ZengAssociação Brasileira de PolímerosPolímeros0104-14281678-51692004-01-0114425126010.1590/S0104-14282004000400010Polypropylene obtained through zeolite supported catalystsQueli C. BastosMaria de Fátima V. MarquesPropylene polymerizations were carried out with f2C(Flu)(Cp)ZrCl2 and SiMe2(Ind)2ZrCl2 catalysts supported on silica, zeolite sodic mordenite (NaM) and acid mordenite (HM). The polymerizations were performed at different temperatures and varying aluminium/zirconium molar ratios ([Al]/[Zr]). The effect of these reaction parameters on the catalyst activity was investigated using a proposed statistical experimental planning. In the case of f2C(Flu)(Cp)ZrCl2, SiO2 and NaM were used as support and the catalyst performance evaluated using toluene and pentane as polymerization solvent. The molecular weight, molecular weight distribution, melting point and crystallinity of the polymers were examined. The results indicate very high activities for the syndiospecific heterogeneous system. Also, the polymers obtained had superior Mw and stereoregularity.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000400010Isotactic polypropylenesyndiotactic polypropylenemetallocene catalystsupports |
| spellingShingle | Queli C. Bastos Maria de Fátima V. Marques Polypropylene obtained through zeolite supported catalysts Polímeros Isotactic polypropylene syndiotactic polypropylene metallocene catalyst supports |
| title | Polypropylene obtained through zeolite supported catalysts |
| title_full | Polypropylene obtained through zeolite supported catalysts |
| title_fullStr | Polypropylene obtained through zeolite supported catalysts |
| title_full_unstemmed | Polypropylene obtained through zeolite supported catalysts |
| title_short | Polypropylene obtained through zeolite supported catalysts |
| title_sort | polypropylene obtained through zeolite supported catalysts |
| topic | Isotactic polypropylene syndiotactic polypropylene metallocene catalyst supports |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-14282004000400010 |
| work_keys_str_mv | AT quelicbastos polypropyleneobtainedthroughzeolitesupportedcatalysts AT mariadefatimavmarques polypropyleneobtainedthroughzeolitesupportedcatalysts |