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 1495 for “"melt"”.
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Melt Inclusion Geochemistry
Silicate melt inclusions (MI) are small samples of melt that are trapped during crystal growth at magmatic pressures and temperatures. The MI represent a sample of the melt that was isolated from the magma during host crystal growth. Thus, MI provide a valuable tool for constraining the magmatic …
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Polymer-organoclay nanocomposites by melt processing
… and several organoclays were prepared by melt processing. A detailed characterization of the thermal degradation of several commercial and experimental organoclays often used to form polymer nanocomposites was reported. The surfactant type, loading, and purification level of organoclay …
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Microporous polymeric membranes via melt processing
… from immiscible polymer blends were produced via melt processing and post-extrusion treatments. Polystyrene (PS)/polypropylene (PP) and poly(ethylene terephthalate) (PET)/polypropylene (PP) blend systems with different rheological properties were studied. The blends were first compounded in an …
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Silicate Melt Inclusions in Igneous Petrogenesis
Silicate melt inclusions are ubiquitous in quartz phenocrysts, yet there are few studies of such inclusions from porphyry copper systems. A melt inclusion forms when magma is trapped in a growing phenocryst. If a phenocryst is able to preserve the original parent magma, then accurate information …
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Quantifying glacier melt enhancement due to dust deposition during the 2022 melt season. Tungnaárjökull glacier, South Iceland
… investigate the impact of the dust event on the melt season SMB, this study used automatic weather station (AWS) data from three different sites on Tungnaárjökull glacier, a SW-outlet of Vatnajökull ice cap. Daily melt was estimated with a simple snow-melt model and AWS data. To quantify the …
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QUANTIFICATION OF MELT DISTRIBUTION, MELT CONNECTIVITY, AND ANISOTROPIC PERMEABILITY OF DEFORMED PARTIALLY MOLTEN ROCKS USING X-RAY MICROTOMOGRAPHY
… and ocean water are all influenced by how the melt is distributed in partially molten rocks, and how easily it can flow through the partially molten mantle beneath these ridges. In particular, it is often assumed that most of the melt ascends through isolated channels that direct it towards the …
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Impact Melt-Bearing Deposits Around Martian Craters
In this work, we investigate impact melt emplacement around Martian craters. We compare our results to melt emplacement processes found on Venus, the Moon, and Mercury. We tentatively find Martian melt emplacement more closely resembles Venusian emplacement, rather than lunar emplacement. This …
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Modelling the evolution of Arctic melt ponds
… of salts during freezing. In the summer sea ice melts at its surface creating melt ponds. An accurate estimate of the fraction of the upper sea ice surface covered in melt ponds during the summer melt season is essential for a realistic estimate of the albedo for global climate models. I will …
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Melt Spinning of the Fine PEEK Filaments
The production of fine filaments using the melt spinning process needs considerable effort. A thermoplastic melt is stretched from the spinneret under a constant take-up speed. The high performance thermoplastic PEEK is solidified in the melt spinning process in a small distance and short time. …
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A reactive melt modification of polyethylene terephthalate
… of polyethylene terephthalate in the melt phase with low molecular weight multifunctional glycidyl compounds as reactive additives. Polyethylene terephthalate undergoes chain extension and/or branching reactions with the additives that result in modified rheological properties suitable …
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Hot-melt extrusion: A versatile pharmaceutical technology
Hot-melt extrusion (HME) is a promising technology for the production of new chemical entities in the developmental pipeline and for improving products already on the market. The first objective of this research work was to describe a continuous process for the production of solid lipid …
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Novel Applications of Hot-Melt Extrusion Technology
Hot-melt extrusion, an adaptable technology, has established its position in a wide spectrum of manufacturing operations like amorphous solid dispersions, immediate and controlled oral formulations, implants, and taste masked products. In recent years the industrial focus has shifted towards …
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The mechanisms of melt stabilisation of polyolefins
The effects of melt stabilisers on the oxidative degradation of polyolefins (polypropylene, low density polyethylene) have been studied under a variety of processing conditions . The changes in the both chemical and physical properties of unstabilised polymers occurring during processing were found …
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Multimodal Polyethylene-Graphene Nanocomposite via Melt Extrusion
… HDPE by a microwave-induced plasma graphene, via melt intercalation, using a closely self-wiping co-rotating twin-screw compounding extruder. The tailored process included designing a suitable screw configuration, paired with coordinating extruder conditions and blending techniques. This enabled …
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Hydrous melt generation in the Earth's mantle
… H₂O in the generation and modification of mantle melts at shallow pressures in subduction zones. In the first and second chapters, two experimental studies are presented that investigate direct mantle melting and then subsequent reaction of deeper mantle melts with overlying, cooler depleted …
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Effect of melt method on thoracolumbar connective tissue
… from LBP. One such self-care treatment is the MELT method. The objective of this study was to determine whether thickness of thoracolumbar connective tissue and other biomechanical and viscoelastic properties of myofascial tissue in the low back region change in subjects with chronic LBP as a …
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Patient Friendly Formulations Utilizing Hot Melt Extrusion Technology
… research work exhibited the new outlook of hot melt extrusion technology for orally disintegrating tablet, fast disintegration films and fixed dose combinations. Previous research demonstrated these applications by conventional formulation techniques which has inherent shortcoming of use of …
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Tuning Melt/Brush Interactions for Functional Polymer Films
… are controlled by interactions at a brush/melt interface. First, we investigated the role of substrate neutrality on domain ordering in thin films of poly(styrene-b-methyl methacrylate) (PS-PMMA) lamellar diblock copolymers con ned between a neutral free surface on the top and nearly …
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Melt processing of Thallium-based high Tc superconductors
Includes bibliographical references.
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