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- Title
Influence of Organoboron Compounds on Ethylene Polymerization Using Cp<sub>2</sub>ZrCl<sub>2</sub>/MAO as Catalyst System.
- Authors
Valencia López, Luis Alexandro; Enríquez-Medrano, Francisco Javier; Mendoza Carrizales, Ricardo; Soriano Corral, Florentino; Castañeda Facio, Adali; de León Gómez, Ramón Enrique Díaz
- Abstract
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.
- Subjects
ZIRCONIUM chlorides; ORGANOBORON compounds; ETHYLENE; POLYMERIZATION; NONIONIC surfactants; CATALYTIC activity
- Publication
International Journal of Polymer Science, 2014, p1
- ISSN
1687-9422
- Publication type
Article
- DOI
10.1155/2014/519203