Dissertações
URI permanente para esta coleçãohttps://rigalileo.itegam.org.br/handle/123456789/174
Dissertações produzidas oriundas de convênios
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Resultados da Pesquisa
Item Efeitos de Açúcares Extraídos de Raízes da Mandiocaba como Co-Plastificantes Glicerol/Mandioca e Glicerol/Mandiocaba(Instituto de Tecnologia, 2018) CHAVES, Lilia Eliza Monteiro; CUNHA, Edinaldo José de SousaThe effects of a Low Concentration Sugar Solution (SBCA), extracted from the mandiocaba bag in natura, as co-plasticizers in combination with glycerol were investigated for the production of thermoplastic starch (TPS) by the casting method, from the starch of mandiocaba and commercial cassava starch. The results were compared to the TPSs produced with water and glycerol, also investigated. Glycerol was reduced to 50% and 25%, substituting water for SBCA. Samples were analyzed by X-ray diffraction (XRD) after 15 days of aging, scanning electron microscopy (SEM), tensile strength (RT), elongation at break (ER), and water vapor permeability (PVA). The results showed that mandiocaba TPSs with SBCA decreased PVA to 90.2%; RT increased on average up to 7.72 times more; ER decreased by 13.4%; SEM showed voids caused by the reduction of glycerol and the use of SBCAItem Vantagens da Aplicação de Material Compósito em Substituição às Ligas Metálicas na Aviação(Universidade Federal do Pará, 2014) BARROS, Marcelo André Santiago; FUJIYAMA, Roberto TetsuoThis paper shows the advantages of applying composites in aircraft structures, mainly in reducing weight, operating costs, and environmental, social, and economic impact. Through documentary research and experimental comparison between composite and metallic alloy aircraft, the efficiency and performance gains are highlighted, along with the new applications of composite materials in air transport and their influence on the global economy.