Influence of Organoboron Compounds on Ethylene Polymerization Using Cp2ZrCl2/MAO as Catalyst System

Organoboron compounds of nonionic and ionic nature, tris(pentafluorophenyl)borane, and N,N-dimethylanilinium tetra(pentafluorophenyl)borate were evaluated to act in conjunction with MAO as activators on ethylene polymerization by using the catalyst Cp2ZrCl2. A decrease on the catalytic activity was...

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Bibliographic Details
Published inInternational journal of polymer science Vol. 2014; no. 2014; pp. 1 - 8
Main Authors Castañeda Facio, Adali, Soriano Corral, Florentino, Mendoza Carrizales, Ricardo, Enríquez-Medrano, Francisco Javier, Valencia López, Luis Alexandro, Díaz de León Gómez, Ramón Enrique
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 01.01.2014
Hindawi Limited
Wiley
Subjects
Boron
Impact strength
Molecular weight
Polyethylene
Polymerization
Polymers
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Summary:Organoboron compounds of nonionic and ionic nature, tris(pentafluorophenyl)borane, and N,N-dimethylanilinium tetra(pentafluorophenyl)borate were evaluated to act in conjunction with MAO as activators on ethylene polymerization by using the catalyst Cp2ZrCl2. A decrease on the catalytic activity was observed in both cases in relation with a reference polyethylene which was synthesized in absence of any organoboron compound. An increase on the crystallinity degree and molecular weight, as well as an improvement in thermal and dynamic-mechanical properties, was observed in polyethylenes synthetized in presence of tris(pentafluorophenyl)borane. A low density polyethylene with improved thermal stability was obtained when N,N-dimethylanilinium tetra(pentafluorophenyl)borate was employed as activator.
ISSN:1687-9422
1687-9430
DOI:10.1155/2014/519203