Nesse trabalho, materiais compósitos à base de polipropileno (PP) carregados com nanopartículas de alumina (Al2O3) e reforçados com fibras de carbono curtas (FC), foram desenvolvidos, visando a obtenção de materiais leves, com alta rigidez, resistência mecânica e estabilidade térmica, passíveis de serem processados em equipamentos comumente usados nas indústrias de polímeros e automotiva. Com essa finalidade, polipropileno foi processado com alumina, em teores definidos através de metodologia de superfície de resposta inserida no software Minitab, de forma a se avaliar o efeito da incorporação de alumina e do polipropileno graftizado com anidrido maleico (PP-g-AM) usado como compatibilizante em algumas amostras. Os compósitos que apresentaram as melhores propriedades mecânicas, no caso, compósitos híbridos PP/PP-g-AM/Al2O3 foram usados como matriz e preparados utilizando teor de alumina de 6% m/m e teores de fibras de carbono variáveis, entre 10% m/m e 15% m/m. As propriedades dos materiais obtidos foram avaliadas através de diversas técnicas de caracterização como: ensaios mecânicos em tração, termogravimetria (TGA), calorimetria diferencial exploratória (DSC) e microscopia eletrônica de varredura (MEV). No presente artigo serão apresentados os resultados do ensaio mecânico em tração. Foi obtido nesse trabalho materiais à base de polipropileno com rigidez e resistência mecânica superiores as apresentadas pelo polipropileno.
The good properties and high productivity obtained through injection molding have enabled the use of composites reinforced with short carbon fibers for the production of automobile components. Their low strength and stiffness, however, have limited the use of these materials in some applications. The incorporation of inorganic nanoparticles such as alumina (Al 2 O 3 ) is a proposed solution to this problem. There is evidence that nanoparticles promote better interfacial interaction between the polymer and short carbon fibers, improving the mechanical performance of composites. The aim of this work was to develop polypropylene (PP) composites reinforced with alumina nanoparticles and short carbon fibers for the automotive industry. The composites were processed in a twin-screw extruder. The response surface methodology was used to define the content of nanoparticles in the composites and to evaluate the effect of the incorporation of the alumina and polypropylene-grafted maleic anhydride (PP-g-MA) on the properties obtained. The hybrid composite that showed the best tensile properties was used as a matrix for reinforcement with different levels of short carbon fiber. The tensile properties were determined by the standard techniques. The results showed that the materials obtained can be used in applications that require low density along with high productivity, rigidity and resistance.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.