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Now showing items 21-30 of 52
Estudo das propriedades de transporte de água e íons em tintas de acabamento à base de poliuretana alifática e poliuretana acrílica, novas e após envelhecimento sob radiação UV.
(Universidade Federal de São Carlos, 2005-08-26)
The present work has as objective the comparative study between anticorrosive painting systems with two types of vehicle - aliphatic polyurethane and acrylic polyurethane - loaded with different concentrations of iron oxide ...
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 ...
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 ...
Caracterização experimental e simulação computacional das deformações induzidas na fusão e cristalização do PTFE
(Universidade Federal de São Carlos, 2016-03-07)
Polytetrafluoroethylene (PTFE) has excellent properties such as chemical inertness
and useful mechanical properties at high and low temperatures. After melt,
the PTFE viscosity is so high that the extrusion and injection ...
Desenvolvimento de perfis extrudados de compósitos de polietileno de alta densidade com farinha de madeira
(Universidade Federal de São Carlos, 2009-12-17)
Polymer profiles extrusion shows some peculiarity due to the flow behavior of these materials during the processing. On the other hand, the profile die design and tooling has been more a result of professional s expertise ...
Desenvolvimento e caracterização de blendas PHBV/Ecoflex® e suas modificações com amidos
(Universidade Federal de São Carlos, 2008-05-30)
Plastics materials produced from petrochemicals are widely used due to
their versatility, mechanical properties and low cost, but they cause environmental
impact as a consequence of the accumulation of great amount of ...
Obtenção de nanocompósitos de poliamida 6 / argila nacional com diferentes agentes compatibilizantes
(Universidade Federal de São Carlos, 2005-09-01)
The formation of nanocomposites well exfoliated is dependent of several factors, like organic treatment with appropriate ammonium quaternary salts to promote adequate interaction between polymer and clay. The objective of ...
Estudo da tenacidade à fratura por meio do método do trabalho essencial de fratura (EWF) da blenda PBT/ABS, reforçada com fibra de vidro
(Universidade Federal de São Carlos, 2008-06-05)
High rubber content acrylonitrile-butadiene-styrene terpolymer (ABS) has been used to tough PBT. As a result, super tough PBT/ABS blends under notched Izod impact have been obtained. However, there has been a significant ...
Influência do negro de fumo na absorção da radiação na região do infravermelho para o reaquecimento do copolímero de poli(tereftalato de etileno) - PET.
(Universidade Federal de São Carlos, 2005-08-06)
The objective of this work was to study the influence of the use of carbon
black as infrared absorber to improve the PET resin heat-up during the
stretching blow molding of bottles. It was investigated the correlation ...
Modificação do Poli(hidroxibutirato) PHB com nucleantes e com o copolímero (etileno-co-acetato de vinila) - EVA
(Universidade Federal de São Carlos, 2008-03-19)
In this work, we sought to modify PHB, processing it in the melted state, and to
evaluate the effect of the modifications on its mechanical properties and
biodegradation characteristics. The following systems were therefore ...