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LAReferencia - Red Federada de Repositorios Institucionales de Publicaciones Científicas Latinoamericanas
Article . 2011
Data sources: LAReferencia - Red Federada de Repositorios Institucionales de Publicaciones Científicas Latinoamericanas
Claim

Obtencao de polietileno linear de baixa densidade utilizando catalisadores ziegler-natta homogeneos e 1-hexeno como comonomero

descriptionPublicationkeyboard_double_arrow_right Article 07 May 2011 Portuguese
Authors: Scipioni, Rosangela Breda; Mauler, Raquel Santos; Galland, Griselda Ligia Barrera; Quijada, Raul;

handle: 10183/28884

Obtencao de polietileno linear de baixa densidade utilizando catalisadores ziegler-natta homogeneos e 1-hexeno como comonomero

Abstract

A homopolimerização de etileno e sua copolimerização com 1-hexeno foram investigadas utilizando-se os catalisadores liegler-Natta homogêneos Et[Ind]2ZrCl2 [Ind]2ZrCl2, Cp2ZrCl2 e Me2SiCpZrCl2. Os catalisadores Me2SiCpZrCl2 e Et[Ind]2ZrCl2 apresentaram maior atividade catalítica na homopolimerização de etileno e mostraramse mais sensíveis à influência da concentração do comonômero. As técnicas de ressonância magnética nuclear de 13C (RMN 13C), viscosidade, análises térmicas e cromatografia de permeação em gel (GPC) foram utilizadas para analisar as propriedades dos copolímeros obtidos. Uma maior incorporação de 1-hexeno no copolímero causou um decréscimo do peso molecular do produto final. As análises de RMN 13C mostraram que os copolímeros com baixos teores de 1hexeno incorporado possuem unidades isoladas de comonômero em sua cadeia principal.

Keywords

Polietileno linear de baixa densidade, Catalisadores ziegler-natta, Complexos metalocenos

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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Average
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