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 10 of 10 for “"Rheological property"”.
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PAA/PEO Comb Polymer Effects on the Rheological Property Evolution in Concentrated Cement Suspensions
… shear technique was developed to probe the rheological property evolution of concentrated cement systems. The rheological property evolution of ordinary and white Portland cement systems were studied in the absence and presence of pure polyelectrolytes and PAA/PEO comb polymers with a wide …
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Integrating novel rheological tools with microscopy to characterize viscoelastic properties of complex materials
Rheological property of any material is the mechanical response when it undergoes stress or deformation. Characterizing these properties is essential because it can help in optimizing the formulation and processing of the materials. Over the years, different rheological techniques have evolved, …
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The Study Of Vinyl Ester Copolymers Derived From Bio-Sourced Fatty Acids
… This dissertation focuses on the preparation and property measurements of thermoplastics using monomers, especially linear vinyl esters (LVEs), which originate from cracked oil-based fatty acids. Commercial LVEs were used in this dissertation study in order to explore some key properties of the …
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The planar entry flow behavior of polymer melts: an experimental and numerical analysis
… Tanner model was found to give adequate rheological property predictions and was used with the penalty finite element method to simulate the entry flow behavior of LDPE and polystyrene. Both qualitative (streamline patterns) and quantitative (extensional stress ratio) agreement was found …
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Shear Thickening In Dense Bidisperse Suspensions By Dynamic Simulation
… conditions, the suspension exhibits an unusual rheological behavior of a gradual decrease in viscosity with the increase of large particle fraction, which we attribute to the particles undergoing ordering under shear flow. In the next simulation study, we explore shear thickening by performing a …
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Rheological effects on gas dispersion in a pilot scale mechanical flotation cell
… have been shown to exhibit non-Newtonian rheological behaviour. The effect of slurry rheology on gas dispersion in a 100 litre mechanical flotation cell was investigated by varying the solids concentration. The study was conducted using kaolin, Bindura nickel and Platreef slurries. All …
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A study of Asphalt Aging Behavior Using Molecular Dynamics Simulations
… laboratory regarding chemical composition and property change due to the difficulties of studying the molecular structures and their dynamic behavior in asphalt. Therefore, Molecular Dynamics (MD) simulation method is used in this study to understand how the chemical composition and property …
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Non-invasive quality evaluation of fruits and vegetables using ultrasound
… and used to investigate physical and acoustical property changes for the selected fruits and vegetables non-invasively. The system included a high power burst pulser, a broadband receiver, a digital storage oscilloscope, two pairs of transducers of 250 kHz and 1 MHz, and a microcomputer system, …
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Volumetric Properties and Viscosity of Lubricant Oils and the Effects of Additives at High Pressure and Temperatures
… led to more desirable thermodynamic and rheological property changes to the lubrication base oil. This change was more definitive with the addition of polymers with more rigid architecture, such as PMAs and SSBs in contrast to the OCPs. The study on the addition of PIBs and capped or …