This dissertation presents results from the use of geophysical methods to study conditions beneath glaciers, including bed physical properties, topography, melting, and water flow. Chapter 1 briefly reviews the history of study and importance of Thwaites Glacier (TG), West Antar…
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Proton exchange membrane fuel cell (PEMFC) technology provides a sustainable power solution as it electrochemically converts the chemical energy stored in hydrogen molecules into electricity, heat, and water. The electrochemical reactions occurring in the catalyst layer (CL), ho…
Industrial processing of soft materials involves a wide range of processing histories that change the material’s nanostructure and, therefore, the properties of the final product. Determining the connection between processing, structure and properties represents a grand challeng…
High-structured carbon blacks are commonly used as electrically conductive additives in electrode slurries that are either processed into solid electrodes for batteries and fuel cells or used as flowable electrodes for semi-solid flow batteries. For these slurries, it is necessa…
The constant progression of society that desires more advanced, more efficient, and more appealing products requires constant need for development of new technologies and novel ways to produce new products. In the area of multi-layered polymeric systems, the need is no different…
The flow behaviour of liquid metals (Sn, Pb and Sn-Pb eutectic) under different shearing conditions is investigated. Experiments were performed with two designs of concentric cylinder viscometers: rotating the inner cylinder (Searle) and rotating the outer cylinder (Couette). Th…
This thesis looks at the study of nanocomposites of Poly(ethylene terephthalate) and organoclays. Two methods of materials blending are investigated for the production of the nanocomposites: solvent blending and melt blending. The main objectives were the investigation of the in…
Novel solutions to offset thermal degradation of polyamide-6 (PA-6) and organoclay (organically modified layered silicates) nanocomposites during melt compounding have been investigated. In this research, a novel chain extender (Joncryl ADR 3400) has been used to improve thermal…
Carbon nanotubes are known as ideal fillers for polymer systems; the main advantage of carbon nanotubes over other nano-reinforcing particles is the combination of superior strength and stiffness with large aspect ratio. Carbon nanotubes may improve the mechanical, electrical an…
Carbon nanotubes (CNTs) have been successfully grafted onto the surfaces of spherical silica gels via a floating-catalyst chemical vapour deposition method. Two types of silica gels were used as substrates; SG6 (6 – 8 nm pore size) and SG26 (26 – 34 nm pore size). The optimum gr…
Melding is a novel process which offers a promising route to creating seamless bonds, by partially curing two laminates in a controlled manner using a Quickstep chamber and subsequently co-curing them. Previous research has focused on melding lap joints in the x-y plane of a com…
Bioethanol is a promising renewable biofuel and wheat is currently the main candidate asthe feedstock for its production in the UK context. The quality of the numerous varieties ofwheat developed in the past by plant breeders has been well examined in terms of bread, biscuitand …
The conditions beneath glaciers and ice-sheets including the topography, hydrology, and geology are essential for understanding ice dynamics, interpreting ice-sheet history, and predicting ice-sheet retreat and sea-level-rise in response to a changing climate. Located in remote …
The objective of this research effort focused on the evaluation of asphalt mixtures with respect to thermal cracking. Preliminary investigations soon indicated that a fundamental evaluation of thermal cracking was highly dependent upon the more complicated understanding of aspha…
Asphalt is an amorphous material whose mechanical performance relies on viscoelastic responses to applied strain or stress. High quality pavement can enhance the commute experience and also can reduce the risk of accidents as well as preventing air pollution. Furthermore, it als…
Binder is modified by several additives in order to improve its' rheological properties as well as its' performance in asphalt mix. In this study, the used base binder is PG70-22 and this binder is modified by mixing with two co-polymers provided by Dynasol: Solprene-1205® (S120…
Consumer's demand for more natural and high quality food products products, presenting health benefits, has increased over the years. Besides the nutritional aspects, an appealing appearance and texture is also required. Cloudiness or opacity (cloudy appearance) is an important …
A laboratory device has been designed and built to simulate film splitting in roll coating, which occurs through filament stretching and breakup. At high speeds and for some coatings, the breakup leads to unwanted misting. In our simulator, a fluid sample is initially held betwe…
Rheology of highly entangled linear polystyrene solutions was studied using both birefringence polarimetry and mechanical rheometry. A phase modulated flow birefringence apparatus was developed which is capable of measuring time-dependent changes in the optical equivalents of sh…