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Mostrando ítems 11-20 de 27
Influence of the Type of Quaternary Ammonium Salt Used in the Organic Treatment of Montmorillonite on the Properties of Poly(Styrene-co-Butyl Acrylate)/Layered Silicate Nanocomposites Prepared by In Situ Miniemulsion Polymerization
(JOHN WILEY & SONS INC, 2011)
Hybrid latices of poly(styrene-co-butyl acrylate) were synthesized via in situ miniemulsion polymerization in the presence of 3 and 6 wt % organically modified montmorillonite (OMMT). Three different ammonium salts: cetyl ...
Optimization of N, N, N-trimethylchitosan synthesis by factorial design
(Wiley-blackwellMaldenEUA, 2011)
Removal of Te and Se anions in alkaline media in presence of cyanide by quaternary ammonium salts
(Shahrood University of Technology, 2018)
Precious metals are currently associated with selenium (naumannite, Ag2Se) and tellurium (calaverite, AuTe2; sylvanite, (Au,Ag)2Te4) to form species refractory to cyanidation. The aim of this preliminary work was to study ...
Catalytic Transformation of Triglycerides to Biodiesel with SiO2-SO3 H and Quaternary Ammonium Salts in Toluene or DMSO
(2022-02-01)
SiO2-SO3 H, with a surface area of 115 m2·g−1, pore volumes of 0.38 cm3·g−1 and 1.32 mmol H+ /g, was used as a transesterification catalyst. Triglycerides of waste cooking oil reacted with methanol in refluxing toluene to ...
Effect of Clay Content and Speed Screw Rotation on the Crystallization and Thermal Behaviors of Recycled PET/Clay Nanocomposites
(Amer Scientific PublishersStevenson RanchEUA, 2009)
Effects of extrusion conditions on the properties of recycled poly(ethylene terephthalate)/nanoclay nanocomposites prepared by a twin-screw extruder
(John Wiley & Sons IncHobokenEUA, 2008)
Synthesis of polycationic bentonite-ionene complexes and their benzene adsorption capacity
(Assoc Brasil Polimeros, 2015-03-01)
The purpose of this work was to structurally modify clays in order to incorporate water-insoluble molecules, such as petroleum hydrocarbons. The potential for ion exchange of quaternary ammonium salts was studied, which ...
Separação e identificação de constituintes químicos polares dos galhos de Porcelia Macrocarpa
(Sociedade Brasileira de Química, 2000-06-01)
This paper describes a methodology to separate and identify polar compounds as flavonoid and lignan glucosides, amino acids, salt of quaternary ammonium amino acid and carbohydrates from branches of Porcelia macrocarpa ...
Unsaturated polyester/bentonite nanocomposites: Influence of clay modification on final performance
(Elsevier, 2013-01-29)
In this work, unsaturated polyester/bentonite nanocomposites were obtained and characterized. The bentonite used was unmodified and with different chemical treatments. The effects of these different chemical modifications ...
Unsaturated polyester/bentonite nanocomposites: influence of clay modification on final performance
(Elsevier, 2013-01-29)
In this work, unsaturated polyester/bentonite nanocomposites were obtained and characterized. The bentonite used was unmodified and with different chemical treatments. The effects of these different chemical modifications ...