Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 221 for “"Latex"”.
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Latex Magazine
… trabajo se expone el proceso de creación de LATEX Magazine, un medio de naturaleza digital especializado en moda. El territorio conceptual y los contenidos en los que la revista se basa es en mostrar la moda como parte de una cultura creativa. Pues, se concibe esta como una expresión de …
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Coagulant dipping of natural rubber latex
… made of' the coagulant dipping of natural rubber latex using calcium, chloride as the coagulant. The primary object of the investigation was to deepen understanding of the kinetics and the mechanisms of deposition. Results are given for the effect of variables such as solids content, latex …
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Peroxide prevulcanization of natural rubber latex
The peroxide prevulcanization of NR latex using a range of commercially-available organic peroxides and an inorganic peroxide (potassium peroxydisulphate), in both activated and non-activated systems, has been investigated. A range of reducing agents and compounds that are known to promote …
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Further investigations of the prevulcanization of natural rubber latex
… has been made of the vulcanization of NR in the latex form and in the dry form. In latex form, NR was found to vulcanize at a much faster rate than in the dry form. The faster rate of reaction in latex prevulcanizatIon is attributed to the presence of the aqueous phase which acts as a medium for …
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Rheological Investigations of Latex-Surfactant-Associative Thickener Aqueous Systems
… film. In this work, quaternary systems of Water-Latex-Thickener-Surfactant were investigated to further the understanding of their behavior in coatings. The thickener used was a well characterized, hydrophobically-modified, ethoxylated urethane (HEUR) with two C18 terminal hydrophobes and 795 …
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Chromatography of Latex Particles in Packed Columns (Hydrodynamic, Dispersion)
… of particle size distributions of polymer latexes. In this work, techniques that involve packed columns with either nonporous packing material (termed hydrodynamic chromatography) or porous packing material (termed porous hydrodynamic chromatography or size exclusion chromatography) were …
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Shrinkage of Latex-Modified and Microsilica Concrete Overlay Mixtures
… deck overlays in Virginia are usually either latex-modified concrete or microsilica concrete, and both types of overlay are considered equivalent in terms of performance. However, the latex-modified concrete overlays are more expensive to construct than the microsilica concrete overlays. Thus, …
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Emissions of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate from latex paint
Latex paints constitute over 70% of interior architectural coatings in the United States. This dissertation is focused on one component of latex paint, 2,2,4-trimethyl-1,3-pentadediol monoisobutyrate (TMPD-MIB). Four substrates (gypsum board, plywood, concrete-A and aluminum) and two simplified …
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The control of gold and latex particles on optical waveguides
… and propulsion of gold nanoparticles and latex microparticles above caesium ion-exchanged waveguides. Gold particles of radii varying from 50nm to 250nm and latex particles varying from 1.5µm to 7.5µm were propelled above a waveguide in an aqueous medium. The evanescent field of the …
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Modification of a commercial poly (VDF-co-HFP) copolymer latex
… from the acrylic modified fluoropolymer (AMF) latex and have superior properties to solvent based, high VOC, air-dry coatings. Their advantages include low viscosities, reduced flammability, reduced odour and easy application using conventional equipment. A large portion of the aqueous coatings …
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Processing behaviour of NR latex with special reference to dipping
… ingredients upon processing behaviour of NR latex with reference to dipping has been conducted in an endeavour to further understanding of the fundamental science underlying latex dipping processes.
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Syneresis and Rheology Mechanisms of a Latex-HEUR Associative Thickener System
… the phase behavior and rheology of waterborne latex / hydrophobically-modified ethoxylated urethane (HEUR) AT systems. When latex volume fraction is held constant, the amount of HEUR (and surfactant) in the mixture determines whether the system experiences syneresis. Dispersion phase diagrams …
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Electrostatic, electrokinetic, and ordering properties of concentrated suspensions of polystyrene latex
The electrokinetic properties of polystyrene latexes are investigated and data reduction indicates that surface charge regulation occurs through the adsorption of ions from the suspending medium. An independent non-electrokinetic method of determining ionic adsorption is developed confirming these …
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Isolation and characterization of latex-specific promoters from Papaver somniferum L.
… alkaloids morphine and codeine are found in latex of opium poppy (Papaver somniferum). Latex is harbored in laticifers, a specialized vascular cell-type. Isolation and characterization of latex-specific genes may provide a useful tool to metabolically engineer increased alkaloid production. …
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Advancing Elastomers to Additive Manufacturing Through Tailored Photochemistry and Latex Design
… of VP printed objects. Polymer colloids (latex) effectively decouple the relationship between viscosity and molecular weight by sequestering large polymer chains within discrete, non-continuous particles dispersed in water, thereby mitigating long-range entanglements throughout the …
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Scale-Up of Latex Reactors and Coagulators: A Combined CFD-PBE Approach
… successful production of a wide range of polymer latex products relies on the ability to control the rates of particle nucleation, growth and coagulation in order to maintain control over the particle size distribution (PSD). The development of advanced population balance models (PBMs) has …
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Morphological study of composite latex particles and water interaction with polymer chains
… mathematical/numerical modeling. For a composite latex particle, the morphology can play an important role in determining the final application properties, and the structure depends on many factors which are active during and after polymerization. Among these are the penetration of oligomeric …
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Effects of water-soluble polymers upon some properties of natural rubber latex
… polymers upon some properties of natural rubber latex has been carried out. All the polymers, which were of two principal types, distinguished according to the rate of addition of polymerisation reactants, were prepared by free-radical initiated solution polymerisation. Two types of monomers, …
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Endovascular treatment of post-traumatic carotid-cavernous fistulae with latex detachable balloons
Carotid cavernous fistula (CCF) is an abnormal connection between the carotid artery and the cavernous sinus. The CCF's are usually classified in three ways: 1. Pathologically, as spontaneous or traumatic; 2. Hemodynamically, into high-flow or low-flow; or 3. Angiographically, as direct or …
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Optimisation of Raman spectroscopy for the analysis of Basidiomycota : spores, latex and mycelium
… additional method for the analysis of Lactarius latex. 2D correlation analysis of the latex spectra gives an overview of the major compositional changes and may discriminate between the different reaction steps. The reaction sequence of Lactarius lacunarum latex is studied. Different types of …
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