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Master's Dissertation
DOI
10.11606/D.3.2009.tde-12082009-170258
Document
Author
Full name
Cláudio Alexander Vossen
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2009
Supervisor
Committee
Valenzuela Díaz, Francisco Rolando (President)
Silva, Leonardo Gondim de Andrade e
Wiebeck, Hélio
Title in Portuguese
Nanocompósitos de ABS/PA e argilas organofílicas.
Keywords in Portuguese
Argilas
Blendas
Difração por raio X
Microscopia eletrônica
Nanocompósitos
Abstract in Portuguese
Os nanocompósitos de polímero e argila têm sido foco de muitos estudos nos últimos 20 anos e existem algumas aplicações comerciais destes produtos. Existe um amplo potencial de desenvolvimento com aplicações em larga escala previstas para os próximos 5 a 10 anos. Estes nanocompósitos são obtidos em geral a partir de argilas esmectíticas submetidas a processos de quaternização, a fim de torná-las organofílicas. O polímero é intercalado entre as camadas lamelares da argila, formando estruturas intercaladas ou esfoliadas. As blendas poliméricas são materiais que reúnem as características de seus dois (ou mais) componentes melhorando as propriedades do material. Este trabalho tem por objetivo a obtenção de nanocompósito a partir de uma argila organofilizadas, e a blenda (ABS/PA). Para efeito de comparação é produzida uma mistura utilizando os mesmos equipamentos e métodos utilizando uma montmorilonita natural. É utilizado o método de intercalação no estado fundido com extrusão e injeção e caracterização deste material com DRX (Difração de raios-X), MEV (Microscopia eletrônica de transmissão) e verificação do desempenho mecânico e térmico.
Title in English
Nanocomposites of ABS/PA and organoclays.
Keywords in English
Clays (characteristics; applications)
Nanocomposites
Polymers
Abstract in English
In the last 20 years, polymer layered clay have been focus of many studies, and some commercial applications of these products are yet in place. A wide potential of development of large-scale production is foreseen to happen in the next 5 to 10 years exists. Nanocomposites obtained from clays, usually esmectites clays are modified by cationic modifiers in order to become organoclays. The polymer enters the galleries of the clay layers, producing intercalated or exfoliated structures. Polymeric blends are materials that congregate the characteristics of its two (or more) components improving the properties of the material. This work has objective to obtain a nanocomposite from an organoclay and a polymeric blend ABS/PA. To compare results is prepared a mixture using a sodium natural Montmorilonite, using same process conditions and equipments. The method used is direct melt intercalation using a melt extruder and injection molding. The characterization of this material is done by X-ray diffraction and Scanning Electron Microscope and verification of the mechanical and thermal performance.
 
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Vossen_Claudio.pdf (2.38 Mbytes)
Publishing Date
2009-08-18
 
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