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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 23 for “"Swelling behavior"”.
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Swelling behavior of Illinois coal shale
<p>"A swelling response model has been defined to predict the maximum expansive pressure and strain developed in roof shales associated with Illinois coal mines. This model also can be used to estimate the magnitude of swelling generated within the shale when it is subject to humidity changes …
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The swelling behavior of clay-sulfate rocks
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Weak polyacid brushes : synthesis, swelling behavior, complex formation and micropatterning
… charged surfactants. The complex formation behavior of PMAA brushes in contact with various small metal ion and oppositely charged surfactant solutions was investigated in detail, both, through in situ and ex situ measurements and significant new insights into the complex formation mechanism …
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Polymeric capsules for self-healing anticorrosion coatings
… interactions and be analogues to the process of swelling. In order to verify the hypothesis, pure polyurethane, polyurea and polyamide were synthesized; their swelling behavior in the solvents used as the encapsulated material was investigated. It was shown that the swelling behavior of the …
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Experimental characterization of a coupled deformation-diffusion theory for elastomeric materials
… characterize the transient and steady-state swelling behavior of this system, and to extract material properties in order to fully characterize a coupled deformation-diffusion theory. Free swelling experiments, transient swelling force measurements, and an analysis of the swollen geometry of …
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Photo-crosslinked Surface Attached Thin Hydrogel Layers
… (e.g. temperature, pH, ionic strength). The bulk behavior of these polymers is widely studied and they show an isotropic swelling. However, thin hydrogel layers of polymers on a substrate show a swelling behavior, which is constrained in some way. Therefore, size, confinement, patternability, …
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Stimuli-responsive polymer nanotube arrays
… blocks for their ability to undergo pH-triggered swelling-deswelling transitions. The swelling behavior was first demonstrated in the in situ synthesis of gold nanoparticles in the PEM; upon suitable post-assembly treatment, the PEM undergoes substantial molecular rearrangements that generate free …
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Synthesis and properties of lignin epoxide
… was added as toughening agent. Sol fraction and swelling behavior, stress-strain behavior and dynamic mechanical behavior of the cured lignin epoxides were studied in relation to cure conditions.
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Optimizing alginate-chitosan microcapsules using co-axial air flow method as 3d stem cell microenvironment
… membrane improves stability over time as their swelling behavior is examined. The surface of the microcapsules is further characterized using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). Permeability of the microcapsules is studied through the release …
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Constitutive modeling of active polymers
… materials. A theoretical model for reversibly swelling active polymer gels is presented. Material responses to different homogeneous deformation conditions are then studied as a function of swelling. The effect of inert rigid filler particles on the swelling behavior of an active polymer is …
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Single molecule tracking studies of solvent-swollen microdomains in cylinder-forming polystyrene-Poly (ethylene oxide) diblock copolymer films
Solvent swelling of block copolymer microdomains plays an essential role in the improvement of microdomain alignment by solvent vapor annealing and in chemical separations using block copolymer monoliths. Here, investigation of the effects of solvent swelling on the molecular permeability and …
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Simulating and calibrating stretchable optical fibers for studying neural dynamics
… nervous system (CNS) in freely-moving animal behavior experiments is greatly limited by the materials available for neural probing and optical recording, such as silica, which are stiff and can damage neural tissue with vigorous test subject movement. In this work, we develop a polyvinyl …
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Metal-polymer nanoparticulate systems for externally-controlled delivery
… Temperature-responsive equilibrium swelling behavior of nanoparticles with varying crosslinking densities was characterized using dynamic light scattering. IPN systems exhibited a positive swelling response upon heating while PNIPAAm and copolymer systems collapsed upon increase in …
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Granular Hydrogels for Localized Nanoparticle Delivery
… tunable architecture, unique dual-scale swelling behavior, and could be lyophilized with optimized excipients to enable long-term storage and rehydration without loss of structural integrity. Loading and release experiments of nucleic acid-encapsulating LNPs demonstrated that GSH–PEG …
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An assessment of silicon carbide as a cladding material for light water reactors
… corrosion rates and predictable swelling behavior. However, other specimens did not fare as well and showed excessive corrosion and cracking. Therefore, the performance of the SiC cladding will depend on appropriate selection of manufacturing techniques. Hoop strength testing …
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Strategies for incorporating functional block copolymers into polyelectrolyte multilayer coatings
… allow for temperature driven, large, reversible swelling transitions of multilayer constructs are determined. Use of weak polyelectrolyte components and selection of an appropriate deposition pH were found to be the critical factors that allowed large scale reversible swelling. These factors were …
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Stereo-directing effect of molecularly imprinted polymers on cinnamic acids
… good thermal stability of the polymer network. Swellingstudies showed differential swelling behavior dependent on solvent, with acetonitrile showing a highdegree of swelling for MIPs and ethanol for the NIPs. Adsorption studies, optimized using a 5:5 v/v methanol/water washing solution 10 mg of …
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Chemomechanics of self-oscillating gels
… profiles of the BZ gel, we showed that the swelling behavior and hydrophobicity of the gel depend on the oxidation state of covalently bound Ru(bpy) 3 . Using timelapse microscopy, we recorded the BZ oscillations and tracked the far from equilibrium chemical behavior exhibited by the gels. …
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Targeting aggregate marginality from a chemical and materials perspective to improve pavement performance
… in the compacted specimens and controls the swelling behavior of marginal aggregates. W-D cycles result in approximately 40% increase in CI and WCI results of produced fines in both sources of aggregates. The W-D can also have an appreciable effect on the permanent deformation, resilient …
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