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Doctoral Thesis
DOI
10.11606/T.3.2017.tde-07112017-145922
Document
Author
Full name
Marcos Gonzales Fernandes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2017
Supervisor
Committee
Wiebeck, Hélio (President)
Cortés, Guillermo Ruperto Martín
Diaz, Francisco Rolando Valenzuela
Esper, Fábio José
Silva, Leonardo Gondim de Andrade e
Title in Portuguese
Obtenção de nanocompósitos de borracha natural e organoargila com variação no processo de organofilização.
Keywords in Portuguese
Argilas
Borracha
Nanocompósitos
Abstract in Portuguese
Foi preparado o nanocompósito de borracha natural/argila chocolate B modificada por sodificação via seca com variação no processo, utilizando silicato de sódio ao invés de carbonato de sódio e tratada com sal quaternário de amônio, cloreto hexadecil trimetil amônio. A argila no seu estado natural, após sodificação e após quaternização foi caracterizada pelas técnicas de microscopia estereoscópica, análise térmica, infravermelho, difração de raios X e microscopia eletrônica de varredura. Outras cargas orgânicas foram adicionadas, como celulose e piaçava e comparadas com cargas tradicionais, como o negro de fumo. As placas obtidas, após vulcanização, tiveram medidas as suas propriedades mecânicas e foram analisadas por DRX e MEV. Os nanocompósitos obtidos mostraram melhoria nas suas propriedades mecânicas em comparação com as placas sem a adição de argila.
Title in English
Making natural rubber-organoclay nanocompósites with variation in the organophilization process.
Keywords in English
Nanocomposites
Natural rubber
Natural rubber nanocomposites
Organophilic clays
Abstract in English
The natural rubber/clay chocolate B nanocomposite modified by dry sodification process with variation processing was prepared using sodium silicate instead of sodium carbonate and treated with quaternary ammonium salt, hexadecyl trimethyl ammonium chloride. The clay in its natural state after sodification and after quaternization was characterized by the techniques of stereoscopic microscopy, thermal analysis, infrared, X-ray diffraction and scanning electron microscopy. Other organic fillers were added, such as cellulose and piaçava, and compared with traditional fillers such as carbon black. The plates obtained after vulcanization had their mechanical properties measured and were analyzed by XRD and SEM. The obtained nanocomposites showed improvement in their mechanical properties in comparison with the plates without the addition of clay.
 
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Publishing Date
2017-11-09
 
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