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 19 of 19 for “"ethylene vinyl acetate"”.
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Controlled release of macromolecules from ethylene-vinyl acetate copolymer matrices : microstructure and kinetic analyses
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nutrition and Food Science; and, (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1981.
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Gas loss and durability of EVA foams used in running shoes
… to analyse changes in the mechanical responseof ethylene vinyl acetate copolymer foams used in running shoes. The equipmentshowed some advantages compared to the standard method used in runningshoes and produced reproducible results. The softening of the material with thedistance run and the …
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The Use of Numerical Methods to Interpret Polymer Decomposition Data
… polyacrylonitrile (PAN), polypropylene (PP) and ethylene-vinyl acetate (EVA) alone, and as potential fire retardant composites have been studied in different conditions to optimise the methodology and analysis of results. Polyacrylonitrile was used to optimise the experimental technique. …
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Development of LDPE-based antimicrobial films for food packaging
… the loss of active AM agents. The effect of polyethylene glycol (PEG) and ethylene vinyl acetate (EVA) in minimising the loss of active AM agent during the manufacturing of low-density polyethylene (LDPE) film is explored by measuring the release of AM agent into food simulants. The release of AM …
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Development and evaluation of low density polyethylene-based antimicrobial food packaging films containing natural agents
… agents were incorporated into a low-density polyethylene (LDPE) substrate using the techniques of both compression moulding and extrusion film blowing. Different film formulations containing additive polymers, ethylene vinyl acetate (EVA) and polyethylene glycol (PEG), were investigated for their …
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Light and Heat Selective Polymer Nanocomposite Films for Sustainable Greenhouses
… of the optical and thermal properties of poly (ethylene-vinyl acetate) (EVA), a common greenhouse plastic, for the concurrent goals of increasing biomass production and reducing energy consumption in greenhouses. The QDs, synthesized by colloidal chemistry using a single-molecular precursor …
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Model-Guided Transdermal Formulation of 1α,25-Dihydroxyvitamin D3 for Improved Safety and Efficacy
… outcome of hypercalcemia. By incorporation an ethylene vinyl acetate (EVA) rate-controlling membrane to slow down and regulate the rate of drug release, we were able to control the slow release from the patch not skin as the rate-limiting step for permeation. A physiologically-based …
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Polymer-organoclay nanocomposites by melt processing
… improve the organoclay exfoliation. A series of ethylene vinyl acetate copolymers, the polarity of which can be adjusted by varying their vinyl acetate contents, based nanocomposites were prepared as the model system to address the relationship between the polarity of the polymers and their …
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The Measurement of Maximal Bite Force in Human Beings
… transducer with and without covering with ethylene vinyl acetate (EVA) sheets, and a newly-developed pressure transducer. Methods: Five separate studies were performed in this project. The experiments were carried out on human volunteer subjects (aged 24 to 41 years). They were all dentate …
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Prototyping of Injection EVA Foam Footwear Midsoles
… is the midsole, often made from a type of ethylene-vinyl acetate (EVA) foam called injection-phylon (IP). IP midsole prototyping is currently exclusively outsourced, however there is a desire for a supplementary internal capability at the PCC. This thesis develops a plan for how the PCC …
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Star-like macromers from lignin
… DMTA of lignin derivative-containing blends with ethylene-vinyl acetate copolymer indicated that the glass transition behavior of the star-like macromers follows the Gordon-Taylor relationship for copolymers. Although variable, the results revealed a consistent decrease in T<sub>g</sub> as a …
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Nanostructured polymers: morphology and properties
… gel dibenzylidene sorbitol (DBS) in a polyethylene (PE) blend has shown to act as a nucleation site on the polymer. Electron microscopy was used to reveal the fibrillar network formed by the DBS and its interaction with the PE. Moreover, the nucleation density in each material was obtained …
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Glass curtain wall and anchorage system response under blast loading
… The study assessed the performance of Polyvinyl Butyral (PVB), Ethylene Vinyl Acetate (EVA), and SentryGlas [registered trademark symbol] (SG) from two suppliers, as well as Thermoplastic Polyurethane (TPU), under varying temperatures. Additionally, it evaluated the static resistance …
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Decomposition and Fire Retardancy of Naturally Occurring Mixtures of Huntite and Hydromagnesite.
… the rate of heat release during combustion of ethylene vinyl acetate based polymer compounds has lead to an understanding of how both huntite and hydromagnesite affect the burning processes at different stages of the fire. By varying the ratio of the two minerals, hydromagnesite has been shown …
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Investigation of the Hemidesmosome Protein Components and Their Roles in the Attachment Mechanism of Leishmania.
… mexicana promastigotes were able attach well to Ethylene-vinyl acetate copolymer (EVA) forming expanded flagella as confirmed by scanning electron microscopy. The EVA material generated high quality and quantity of parasites to use for protein investigations. Protein extraction followed by …
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Linking Thermophysical Transitions and Rheological Properties to Polymer Foaming Outcomes with Carbon Dioxide
… are thermoplastic elastomers including poly(ethylene-co-vinyl acetate) (EVA) and poly(ethylene-co-vinyl acetate-co-carbon monoxide) (EVACO). These materials find use in numerous commercial applications including adhesives, compatibilizers, and foams. Their foams are noted to undergo …
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Poly(o-methoxyaniline): Synthesis, Doping and Composites
… a novel composite material. On the other hand, ethylene vinyl acetate copolymer (EVA) was selected as the thermoplastic matrix mainly owing to its low processing temperature and superior flexibility. POMA-EVA composite was for the first time prepared through melt blending. Compared to the ICP …
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Modelizado y optimización de problemas mecánicos no lineales mediante el Método de Elementos Finitos, RSM y ML
… Rubber), SBR (Styrene-Butadiene Rubber), EVA (Ethylene-Vinyl-Acetate) and PU (Polyurethane) types have been tested to validate the proposed methodology. Each of the tests carried out on the materials was replicated using a finite element model. These models were used as a source of information …
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Antimony and acetaldehyde migration from Nigerian and British PET bottles into water and soft drinks under typical use conditions. Concentration of migrants and some trace elements in polyethylene terephthalate and in bottled contents.
Polyethylene terephthalate (PET) is an excellent material for bottling water, beverages, edible oils and other liquids because it is light, tough and transparent. PET bottles are also extensively reused for storage of drinking water, beverages and other liquids and for solar disinfection of …