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Resinas de fenol-formaldehído modificadas con ligninas: sintesis, caracterización y modelado matemático
(2016-10-14)
Las ligninas son polímeros polifenólicos naturales obtenidos principalmente como subproducto en la industria papelera.
En la actualidad, las ligninas se utilizan como reemplazo parcial de fenol que es un recurso no ...
Microestrutura e resistência da zircônia parcialmente estabilizada
(Universidade Estadual Paulista (Unesp), 2022-06-29)
O objetivo deste estudo foi desenvolver um vidro termicamente compatível
ao ser infiltrado em uma zircônia parcialmente estabilizada por óxido de ítrio (5YPSZ), caracteriza-la, avaliar sua confiabilidade estrutural e ...
Mechanical Evaluation of Laminates Based on Phenolic Resins using Lignins as Partial Substitutes for Phenol
(North Carolina State University. Department Of Wood And Paper Science, 2015-10)
Reducing the consumption of phenol during synthesis of phenolic resins is of great technological and scientific interest because of its economic and environmental implications. In this work, the use of hydroxymethylated ...
Otimização de pilares de concreto armado com seções retangulares e circulares submetidos à flexão composta oblíqua
(Universidade Tecnológica Federal do ParanáGuarapuavaBrasilEngenharia CivilUTFPR, 2019-12-06)
This work presents a computational algorithm, called “PFOC”, for optimization of reinforced concrete columns of rectangular and circular cross sections subjected to axial forces and biaxial bending. Columns with a slenderness ...
Vitrocerâmica altamente bioativa, de boa resistência mecânica e baixo módulo elástico
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMCâmpus São Carlos, 2019-09-03)
Bioactive glass and glass-ceramics have the property of binding directly to living tissue. However, from mechanical performance, these materials have some disadvantages such as low fracture resistance. Some properties ...
Efecto del sembrado y reforzamiento in situ en la síntesis y procesamiento de biocerámicos hidroxiapatita/alúmina
(Universidad Michoacana de San Nicolás de Hidalgo, 2007-08)
In this work, it was studied the effect of adding in situ α-Al2O3 (as part booster) and HA commercial seeds for the synthesis of hydroxyapatite (HA) to from inorganic precursors Ca(NO3)2 and (NH4)2 HPO4. The precipitate ...
Dynamics of confined liquid crystals
(Medellín - Minas - Doctorado en Ingeniería - Ciencia y Tecnología de MaterialesDepartamento de Materiales y MineralesUniversidad Nacional de Colombia - Sede Medellín, 2020-09-07)
Thermotropic nematic liquid crystals in contact with surfaces at the nanoscale were studied by means of beyond equilibrium thermodynamics and computational simulations. In particular, nanoparticles of different geometries ...
Sign change of Poisson's ratio for carbon nanotube sheets
(Amer Assoc Advancement ScienceWashingtonEUA, 2008)