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Doctoral Thesis
DOI
10.11606/T.3.2016.tde-20062016-083922
Document
Author
Full name
Danilo Marin Fermino
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2015
Supervisor
Committee
Diaz, Francisco Rolando Valenzuela (President)
Brant, Antônio Jedson Caldeira
Dweck, Jo
Parra, Duclerc Fernandes
Wiebeck, Hélio
Title in Portuguese
Propriedades mecânicas e térmicas de nanocompósito híbrido de polipropileno com adição de argila e celulose proveniente de papel descartado.
Keywords in Portuguese
Argila
Celulose
Nanocompósito híbrido
Polipropileno
Abstract in Portuguese
Este trabalho aborda o estudo do comportamento mecânico e térmico do nanocompósito híbrido de polipropileno com uma argila brasileira bentonítica do Estado da Paraíba (PB), conhecida como "chocolate" com concentração de 1, 2 e 5 % em massa com a adição de 1 e 2 % em massa de celulose proveniente de papel descartado. Foi utilizado nesse nanocompósito o agente compatibilizante polipropileno graftizado com anidrido maleico PP-g-AM com 3 % de concentração em massa, através da técnica de intercalação do fundido utilizando uma extrusora de dupla-rosca e, em seguida, os corpos de prova foram confeccionados em uma injetora. O comportamento mecânico foi avaliado pelos ensaios de tração, flexão e impacto. O comportamento térmico foi avaliado pelas técnicas de calorimetria exploratória diferencial (DSC) e termogravimetria (TGA). A morfologia dos nanocompósitos foi estudada pela técnica de microscopia eletrônica de varredura (MEV). A argila, a celulose e os nanocompósitos híbridos foram caracterizados por difração de raios X (DRX), fluorescência de raios X (FRX) e espectroscopia no infravermelho (FTIR). Nos ensaios mecânicos de tração houve um aumento de 11 % na tensão máxima em tração e 15 % no módulo de Young, para o nanocompósito com argila, PPA 5 %. No ensaio de impacto Izod, o nanocompósito com argila, PPA 2 % obteve um aumento de 63 % na resistência ao impacto. Para o nanocompósito híbrido PPAC 1 % houve aumento de 8 % na tensão máxima em tração e para o nanocompósito híbrido PPAC 2 % houve aumento de 14 % na resistência ao impacto.
Title in English
Mechanical and thermal properties of hybrid polypropylene nanocomposite with addiction of organoclay and discarded bond paper.
Keywords in English
Cellulose
Clay
Hybrid nanocomposite
Polypropylene
Abstract in English
This work concerns to the study of the mechanical and thermal behavior of the hybrid polypropylene nanocomposite with a Brazilian bentonite clay from State of Paraíba (PB), known as "Chocolate" in concentrations of 1, 2 and 5 % by weight with addition of 1 and 2 % in weight cellulose discarded bond paper. The compatibilizer agent based on maleic anhydride grafted polypropylene, known as PP-g-MA, was added at 3 % weight concentration through the melt intercalation technique using a twin-screw extruder, and afterwards, the specimens were prepared by injection process. The mechanical behavior was evaluated by strength, flexural strength and impact tests. The thermal behavior was evaluated by the differential scanning calorimetry (DSC) and thermogravimetry (TGA). The morphology of the nanocomposites was studied by the technique of scanning electron microscopy (SEM). The clay, cellulose and the hybrid nanocomposites were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF) and infrared spectroscopy (FTIR). Results of mechanical tests showed an 11 % and 14 % increase in the tensile strength and Young's modulus, respectively, for the nanocomposite PPA 5 % with clay. The nanocomposite PPA 2 % with clay obtained a 63 % increase in strength Izod impact test. The hybrid nanocomposite PPAC 1 % obtained an 8 % increase in tensile strength. In the Izod impact test, the hybrid nanocomposite PPAC 2 % obtained 14 % increased in the impact strength.
 
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Publishing Date
2016-06-20
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • FERMINO, D.M., et al. HMSPP nanocomposite and Brazilian bentonite properties after gamma radiation exposure [doi:10.1016/j.radphyschem.2012.06.021]. Radiation Physics and Chemistry (1993) [online], 2013, vol. 84, p. 176-184.
  • FERMINO, D., et al. Preparation and Characterization of Polypropylene Nanocomposites with Organoclay and Discarded Bond. In TMS 2014 143 Annual Meeting & Exibition, San Diego, 2014. Characterization of Minerals, Metals and Materials 2014.New Jersey : Wiley TMS, 2014. Available from: http://file:///C:/Users/Francisco/Downloads/Characterization2014.pdf.
  • GOMEZ, L.V.R., et al. Polypropylene Nanocomposites Reinforced with Organophilic Clay and Brazilian Nut Fibers. In TMS 2014 143 Annual Meeting & Exibition, San Diego, 2014. Characterization of Minerals, Metals and Materials 2014.New Jersey : TMS, 2014. Available from: http://file:///C:/Users/Francisco/Downloads/Characterization2014.pdf.
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