PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATION

Polyethylene nanocomposites were obtained by in situ polymerization using both montmorillonite (natural clay) and montmorillonite organically modified with octadecylamine (O-Clo). In this proposed methodology the clays were added directly in the reactor together with the catalytic system (metallocen...

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Autores principales:	ZAPATA,PAULA, QUIJADA,RAÚL, RETUER,JAIME, MONCADA,EDWIN
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2008
Materias:	Nanocomposites Montmorillonite Polyethylene Metallocene
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100006
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spelling	oai:scielo:S0717-970720080001000062008-07-03PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATIONZAPATA,PAULAQUIJADA,RAÚLRETUER,JAIMEMONCADA,EDWIN Nanocomposites Montmorillonite Polyethylene Metallocene Polyethylene nanocomposites were obtained by in situ polymerization using both montmorillonite (natural clay) and montmorillonite organically modified with octadecylamine (O-Clo). In this proposed methodology the clays were added directly in the reactor together with the catalytic system (metallocene catalyst and methylaluminoxane) and ethylene. The nanocomposites were characterized by gel permeation chromatography (GPC), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and transmission electron microscopy (TEM), and by tensile stress-strain tests. It was found that the catalytic activity increased around 20% when natural clay was used compared with the standard polymer. But when modified clay was used the catalytic activity did not show important changes. On the other hand, XRD and TEM showed that the clays are in a disordered state and well dispersed in the polyethylene matrix. Finally, the nanocomposites showed an increase of about 30% in Young's modulus compared with the standard polymerinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.53 n.1 20082008-03-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100006en10.4067/S0717-97072008000100006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Nanocomposites Montmorillonite Polyethylene Metallocene
spellingShingle	Nanocomposites Montmorillonite Polyethylene Metallocene ZAPATA,PAULA QUIJADA,RAÚL RETUER,JAIME MONCADA,EDWIN PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATION
description	Polyethylene nanocomposites were obtained by in situ polymerization using both montmorillonite (natural clay) and montmorillonite organically modified with octadecylamine (O-Clo). In this proposed methodology the clays were added directly in the reactor together with the catalytic system (metallocene catalyst and methylaluminoxane) and ethylene. The nanocomposites were characterized by gel permeation chromatography (GPC), differential scanning calorimetry (DSC), X-ray diffraction (XRD), and transmission electron microscopy (TEM), and by tensile stress-strain tests. It was found that the catalytic activity increased around 20% when natural clay was used compared with the standard polymer. But when modified clay was used the catalytic activity did not show important changes. On the other hand, XRD and TEM showed that the clays are in a disordered state and well dispersed in the polyethylene matrix. Finally, the nanocomposites showed an increase of about 30% in Young's modulus compared with the standard polymer
author	ZAPATA,PAULA QUIJADA,RAÚL RETUER,JAIME MONCADA,EDWIN
author_facet	ZAPATA,PAULA QUIJADA,RAÚL RETUER,JAIME MONCADA,EDWIN
author_sort	ZAPATA,PAULA
title	PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATION
title_short	PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATION
title_full	PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATION
title_fullStr	PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATION
title_full_unstemmed	PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATION
title_sort	preparation of nanocomposites by in situ polimerization
publisher	Sociedad Chilena de Química
publishDate	2008
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072008000100006
work_keys_str_mv	AT zapatapaula preparationofnanocompositesbyinsitupolimerization AT quijadaraul preparationofnanocompositesbyinsitupolimerization AT retuerjaime preparationofnanocompositesbyinsitupolimerization AT moncadaedwin preparationofnanocompositesbyinsitupolimerization
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PREPARATION OF NANOCOMPOSITES BY IN SITU POLIMERIZATION

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