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 18 of 18 for “"Water-soluble polymers."”.
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Effects of water-soluble polymers upon some properties of natural rubber latex
An investigation of the effects of various water-soluble polymers upon some properties of natural rubber latex has been carried out. All the polymers, which were of two principal types, distinguished according to the rate of addition of polymerisation reactants, were prepared by free-radical …
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Fabrication and light scattering study of multi-responsive nanostructured hydrogels and water-soluble polymers.
Monodispersed microgels composed of poly-acrylic acid (PAAc) and poly(N-isopropylacrylamide) (PNIPAM) interpenetrating networks were synthesized by 2-step method with first preparing PNIPAM microgel and then polymerizing acrylic acid that interpenetrates into the PNIPAM network. The semi-dilute …
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Synthesis and characterization of novel polymer-ceramic nanocomposites: Organoceramics
… nanocomposites (organoceramics) based on various water soluble polymers and calcium aluminate hydrates. Synthesis of these materials involves the aqueous precipitation of the inorganic crystals in the presence of polymer. The presence of polymer during crystallization often leads to changes in …
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Dissolution kinetics of model api in molten polymer excipients during batch processing
… forms and products. By dissolving the poorly-soluble active pharmaceutical ingredients (API) into water-soluble polymers, the bioavailability of the Class II (with low solubility and high permeability in water) API in Biopharmaceutical Classification System (BCS) could be significantly …
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Green Organic Solar Cells from a Water Soluble Polymer and Nancrystalline TiO2
… nanomaterials at room temperature. However, most polymers used in solar cells are dissolved in organic solvents such as xylene, toluene, chloroform, and chlorobenzene. Such solvents are harmful to people and environments, leading to higher costs due to complicated waste disposal processing. This …
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Development of thin film oral drug delivery devices for use in paediatric and palliative care patient populations
… thin films (OTFs), composed principally of water soluble polymers,dissolve quickly in saliva without the need to chew or drink water. They areideally suited to patients who struggle to swallow other solid oral dosageforms such as tablets; for example, paediatric or elderly patients.In order …
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AMPHOTERIC POLYAMIDOAMINES AS FUNCTIONAL SPECIALTY POLYMERS
… the potential environmental impact of amphoteric water-soluble PAAs, which may accidentally be released into ecosystems during or after their useful life. The ecotoxicity of PAAs was evaluated on the early stages of plant development using Lepidium sativum (watercress) seeds. In this study, the …
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Investigation of Amorphous Solid Dispersions of Poorly Water-soluble Drugs in Poly (2-hydroxyethyl Methacrylate) Hydrogels for Enhanced Solubility and Controlled Release
… to enhance the dissolution behavior of poorly water-soluble drugs. The first part of the study identifies physicochemical properties affecting the solid state and physical stability of ASD of the model drug indomethacin (IND) in PHEMA hydrogels. The results of the second part show that ASD …
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The effect of quenchant characteristics on the generation of thermal stress and strain in steel plates.
… plate of high hardenability steel (835M30) in water, nine experimental oils and a polymer. In.the case of water, previous comparisons between experimental and calculated residual strains was poor. This discrepancy, during the present investigation, was reduced by introducing into the model the …
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Development of novel polymeric microneedle systems for long-acting intradermal delivery of poorly soluble compounds
… compounds. Intradermal delivery of poorly soluble drugs involves the delivery of drugs into the skin to exert localised effects. However, relatively few drugs possess the necessary properties to passively traverse the skin and remain in the skin in a high level and long-acting way. …
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Designing Multiphase Step-Growth Polymers for Advanced Technologies: From Electromechanical Transducers to Additive Manufacturing
The synthesis and characterization of step-growth polymers with novel monomers provided materials with tailored properties for emerging technologies. Specifically, multiphase materials (i.e., microphase separated block copolymers) exploit the synergistic relationship of combining polymers with …
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Improving Photocatalytic Hydrogen Production of Ru,Rh,Ru Supramolecular Complexes in Aerobic Aqueous Solutions
The production of hydrogen fuel via solar water splitting is an important carbon-neutral strategy for the development of renewable resources and has sparked great interest in the scientific community. Hydrogen production efficiencies for supramolecular photocatalysts of the architecture …
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LIQUID PLASTICS AS A NEW ENVIRONMENTAL PROBLEM? AN INTEGRATED RISK ASSESSMENT OF POLYVINYL ALCOHOL, POLYETHYLENE GLYCOL, POLYVINYL PYRROLIDONE AND POLYACRYLIC ACID
Water-soluble polymers (WSPs), also known as "liquid plastics," are synthetic polymers that dissolve, disperse, or swell in water due to their hydrophilic groups. Despite their extensive use in various industrial and domestic products, these polymers are not currently regulated under European …
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An investigation into polymeric excipient-drug compatibility in solid-liquid formulations
… by quantifying the adsorption of different polymers onto a range of drug substances from different solvent environments and to establish which physico-chemical properties of the polymers control their adsorption or non-adsorption onto a particular drug. The pharmaceutical actives, two …
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Evaporation rates from emulsions stabilised by surfactants and nanoparticles
… gelling agents (colloidal particles and water-soluble polymers) show that the evaporation rates depend on the gelling agent. For high internal phase emulsions, evaporation rates of water from emulsions containing involatile oils have been studied. Depending on the geometrical properties …
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Structure-property-processing relationships between polymeric solutions and additive manufacturing for biomedical applications
… manufacturing (AM) creates 3D objects out of polymers, ceramics, and metals to enable cost-efficient and rapid production of products from aerospace to biomedical applications. Personalized products manufactured using AM, such as personalized dosage pharmaceuticals, tissue scaffolds, and …
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Polypyrrole-containing Composite Particles: Preparation, Characterization and Application
… oxidative polymerization method. As a template, water-soluble polymers, polymeric microgels, latex particles or bulk gels can be used. The morphology and properties of the composite particles can be controlled effectively by the proper use of the template. By choosing the dopant anion or …
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Controlling the mechanical and transport properties of layer-by-layer films and electrospun mat composite membranes for fuel cell applications
… can be used with highly proton conductive water soluble polymers as well as doped polymers. In addition, LbL assembly can be used to coat a variety of substrates of various shapes and sizes. An LbL system composed of poly(diallyl dimethyl ammonium chloride) (PDAC) and sulfonated …