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 69 for “"Polyethylene terephthalate (PET)"”.
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Performance Characteristics of Polyethylene Terephthalate (PET) Modified Asphalt
<p>Polyethylene terephthalate (PET) plastic is utilized primarily in food and beverage packaging. Although a portion of waste PET is recycled, the majority of the waste is buried in landfills. Therefore, the use of ground PET particles in asphalt may provide an environmentally friendly solution for …
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High density polyethylene (HDPE) containers as an alternative to polyethylene terephthalate (PET) bottles for solar disinfection of drinking water in northern region, Ghana
… the technical feasibility of high density polyethylene (HDPE) containers as an alternative to polyethylene terephthalate (PET) bottles for the solar disinfection of drinking water in the Northern Region of Ghana, in a process know as SOLAIR. This study is in line with the intention of Pure …
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Morphology, Crystal Structure, Phase Transitions and Blend Compatibility of Thermotropic Liquid Crystal Terpolyesters
… of P7 and P7-X in binary blends with polyethylene (PE), polyethylene terephthalate (PET), and nylon 6 (Ny6), was examined to evaluate the effect of the aliphatic segment in promoting good adhesion at the interphase. Partial compatibility was observed for PE blends, while miscibility …
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Morphology and Properties of Amorphous Polyethylene Terephthalate
Physical and mechanical properties of amorphous polyethylene terephthalate (PET) have been measured. A uniform morphology was observed when PET thin film (ca. 1000 (ANGSTROM)) was ultraquenched from above its equilibrium melting temperature. Sufficiently rapid quenching rate below T(,g) and heating …
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Engineering of Saccharomyces cerevisiae for renewable production of plastic precursor chemicals from plant biomass
… recent growing attempts to replace conventional petroleum-based production processes with renewable direct bioconversion processes, however, have not yet been made successful due to low production efficiency. Here, we studied the development of a bioprocess for the renewable production of …
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Selective molecular transport in nanopore systems
… First, I present my study of nanopores in polyethylene terephthalate (PET), revealing the mechanism for variance in current rectification based on cation species. Second, I demonstrate the mechanism of selective probe capture in bacterial toxin protein α-hemolysin (aHL) using …
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Ultrasonic inspection methods for defect detection and process control in roll-to-roll flexible electronics manufacturing
… at launching ultrasonic Lamb waves along Polyethylene Terephthalate (PET) film. Using hydrogel wedges, the fundamental antisymmetric (Ao) Lamb wave mode was successfully propagated a distance of 2 cm. ABS wedges were found to initiate longitudinal waves, which were detected at a distance …
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In Vivo Studies of the Foreign Body Reaction to Biomedical Polymers
… implants of polyether urethane (PEU) and polyethylene terephthalate (PET) in immunodeficient mice strains. Analysis on polymer surfaces using quantitative calculations such as percent fusion, cell density, and nuclei density described the development of foreign body reaction on biomaterial …
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THE EFFECTS OF RECYCLED WASTE ON CONCRETE MIXTURE PROPERTIES
… design. Three types of plastics, High-Density Polyethylene -HDPE, Ultra-High Molecular Weight Polyethylene -UHMWPE, Polyethylene Terephthalate -PET, and a Grind/ Crumb rubber were evaluated to be used in a concrete mixture to determine the physical and mechanical properties. There are numerous …
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An analysis of subsidies within the plastics recycling industry
Polyethylene terephthalate (PET) is widely used in the manufacture of food and beverage containers, in addition to a variety of fibres. PET is considered to be 100% recyclable and can be recycled into a number of different end-use streams: bottle-to-bottle; bottle-to-foodgrade, or bottle-to-fibre. …
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Spirasol : improvements to semi-continuous solar disinfection water treatment systems
… disinfection method called SODIS that uses a Polyethylene Terephthalate (PET) bottle. To address microbial removal capacity, the two systems were assembled and tested in Nairobi, Kenya and later in Cambridge, Massachusetts. The issue of economic feasibility and component availability were also …
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Hemocompatibility of polymeric materials for blood-contacting applications
… (ePTFE), linear low-density polyethylene (LLDPE) and polyethylene terephthalate (PET); 3 potential materials for blood-contacting applications. The surface morphology was characterized using scanning electron microscopy (SEM), and surface wettability was characterized using …
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Large-scale graphene transfer in ultra-high vacuum and design of a low temperature ultra-high vacuum scanning tunneling microscope
… via a modified direct contact transfer method. A polyethylene terephthalate (PET) film was chosen as the material for supporting graphene during the in-situ transfer. Both a scanning electron microscope and an atomic force microscope were used to characterize the transferred graphene quality. This …
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Surface Modification of Commonly used Polymer Plastics for Increased Hemocompatibility in Medical Equipment
… used in making perfusion equipment components: polyethylene terephthalate (PET), polycarbonate (PC), polyvinyl chloride (PVC), polypropylene (PP), poly (methyl methacrylate) (PMMA), polyurethane (PU), polysulfone (PS). All materials had MEG-OH adlayer formed and characterized with x-ray …
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Studies of blends containing liquid crystalline polymers with PET and related investigations of hydroquinone/biphenol polysulfone systems
… liquid crystalline copolyesters with polyethylene terephthalate (PET). Data were obtained which showed not only the temperature dependence of the moduli and stress-strain behavior but also the orientation effects that must be prevalent in order to explain the differences between the …
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Advancing sustainability in additive manufacturing: material formulation and process development for recycled PET and PET/HDPE blend
… accumulation of plastic waste, particularly polyethylene terephthalate (PET), presents a major environmental challenge due to inefficient recycling and sorting processes. The high-density polyethylene (HDPE) contamination in recycled PET (r-PET) in waste stream further complicates its …
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Recycled material selection for affordable and sustainable homes using large scale additive manufacturing
… and cost, the best candidate appears to be polyethylene terephthalate (PET). Recycled PET (rPET), is available in volumes comparable to the projected demand for low cost housing. rPET material properties optimize the feasibility, processing, and engineering use qualities of the building …
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Mechanical Properties of Random Discontinuous Fiber Composites Manufactured from Wetlay Process
… glass and carbon fiber. Polypropylene (PP) and Polyethylene Terephthalate (PET) were used as the matrix. Glass/PP and Glass/PET plaques that had fiber volume fractions ranging from 0.05 to 0.50 at an increment of 0.05 were molded. Both tensile and flexural tests were conducted. The test results …
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Desenvolvimento de antisséptico bucal em pastilha para prevenção da cárie dental
… the conditions studied when stored in glass or polyethylene terephthalate(PET)bottles. Thus, it can be considered that CPC lozenges with adequate pharmacotechnical characteristics and stability were obtained.
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Physical ageing in semi-crystalline polyethylene terephthalate
… has been, as far as research shows, no work on Polyethylene Terephthalate (PET) and the effects ageing can have on this polymer. Two sets of testing were performed, the first on a Thermo-mechanical Analyser (TMA) and the second on a Differential Scanning Calorimeter (DSC). The glasstransition …
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