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Modificação por nitretação a plasma das superfícies dos aços AISI-4140, AISI-420C e DIN16MnCr5
(Universidade Federal de São Carlos, 2011-05-26)
Plasma nitriding is a surface modification technique used for improving hardness, wear resistance, and fatigue. In this work, samples of AISI-4140, DIN16MnCr, and AISI-420C steels were heat treated, forming martensitic ...
Deformação da fase dispersa e degradação de blendas poliméricas em extrusora dupla-rosca aberta e fechada
(Universidade Federal de São Carlos, 2011-09-05)
In order to obtain flexibility of the processing in a twin-screw extruder and operate it as an internal mixer, the second phase dispersion and deformation and degradation were analyzed during processing in an open and ...
Desenvolvimento de um colorímetro in-line para o monitoramento da extrusão de polímeros
(Universidade Federal de São Carlos, 2014-01-30)
This work shows the development, construction, validation and application of an in-line colorimeter used for real time color quantification of the melted flow during polymer processing in the extruder. The device uses a ...
Reutilização de fibras de para-aramida como reforço mecânico em poliamida 6,6
(Universidade Federal de São Carlos, 2016-06-09)
Aramid fibers are very known by their excellent combination of tensile strength and elastic modulus with low density. On the other hand, aramids do not melt which difficult the recycling process. This property is an important ...
Tenacificação de poli(ftalamida) (PPA) através de nanocompósitos com carbonato de cálcio e de blendas com copolímero estireno/etileno-butileno/estireno (SEBS)
(Universidade Federal de São Carlos, 2010-05-20)
This project aims the toughening of a high performance thermoplastic polyphthalamide (PPA). PPA resins is a good choice for special applications where the conditions are more severe than the ones an engineering thermoplastic ...
Caracterização de poli(hexametileno biguanida) e suas blendas com poli(álcool vinílico)
(Universidade Federal de São Carlos, 2012-07-31)
In this study, the physical-chemical characterization of poly(hexamethylene biguanide) hydrochloride, PHMB, was performed. It is a low molecular weight synthetic polymer with a broad-spectrum biocidal activity, widely used ...
Desvulcanização termomecânica contínua de borracha natural da banda de rodagem de pneus automotivos por meio do processo de extrusão em rosca dupla
(Universidade Federal de São Carlos, 2015-09-10)
The Natural rubber is a renewable source material widely used in the manufacture of automotive tire tread. The vulcanization results in a high thermodynamic stability and wide working range materials. However, after the ...
Avaliação da resistência à corrosão e das propriedades mecânicas da junta soldada de aço inoxidável duplex
(Universidade Federal de São Carlos, 2015-12-16)
The corrosion resistance and mechanical properties of hardness and toughness of a welded joint multipass duplex stainless steel have been evaluated under the condition with post-weld heat treatment and as-welded. The ...
Avaliação da correlação entre o trabalho essencial de fratura (EWF) e o grau de gelificação de compostos de PVC rígido
(Universidade Federal de São Carlos, 2011-07-14)
Poly(vinyl chloride) or PVC is among the most consumed thermoplastics in the world and has great versatility: A wide range of products, from pipes and rigid window frames to flexible foams, various types of materials such ...
Estudo comparativo entre as tecnologias via úmida e via seca para a preparação de massas de porcelanatos
(Universidade Federal de São Carlos, 2011-09-20)
Considering the growth of the Brazilian ceramic tiles sector and its expressivity in the global setting, the present work has been developed in order to evaluate the main differences related to the preparation of bodies ...