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.
Results
Showing 1 to 20 of 86 for “"Synthetic polymers"”.
-
Synthetic polymers for ophthalmic applications
… patents, concerned with an important group of polymers, `rigid gas permeable contact lens materials'. A comparison is made of similarities in the underlying chemical themes, centring on the use of variants of highly branched siloxy compounds with polymerizable methacrylate groups. There is a …
-
Structural Study of Natural and Synthetic Polymers
In the second part, the molecular composition, size and conformation of zein, corn prolamines, was examined with MALDI-MS, TEM, SEC3, SAXS and viscometry. MALDI-MS is demonstrated to be a superior technique to study the molecular weight and composition of zein proteins than conventional SDS-PAGE. …
-
ENHANCING THE BONDING OF SYNTHETIC POLYMERS MIMICKING MARINE BIOADHESIVES
… and each other, even when wet. In developing synthetic mimics of mussel adhesive proteins, we are incorporating simplified forms of cross-linkable monomers into synthetic polymer backbones. One such example is poly[(3,4-dihydroxystyrene)-co-styrene] in which 3,4-dihydroxystyrene can provide …
-
Replication of Sequence Information in Recognition-Encoded Synthetic Polymers
… directed evolution processes to yield functional polymers. If directed evolution could be applied to synthetic oligomers, then new classes of functional polymers might be discovered. To reach this goal, new methods for replication of information-encoded synthetic oligomers must be realised. …
-
DEVELOPMENT OF SYNTHETIC POLYMERS FOR BONE TISSUE ENGINEERING: ENGINEERING THE DEGRADATION RATE
… synthesis, and characterization of biodegradable synthetic polymers, poly (butylene fumarate) (PBF) and the copolymer poly (butylene fumarate)-co-(butylene maleate) (PBFcBM) is described. The unsaturated linear polyesters were synthesized via two synthetic routes, including an acid catalyzed …
-
Surfactant Assisted Electrospray Ionization Time of Flight Mass Spectrometry of Synthetic Polymers
Synthetic polymers are complex mixtures which often require extensive characterization to determine chemical composition and structure. Mass spectrometric techniques have greatly enhanced the quantity, as well as the quality, of data that can be used to characterize synthetic polymers. Electrospray …
-
Graft copolymerization on the surface of synthetic polymers for improved electrostatic properties,
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1968.
-
Surface engineering, characterisation and applications of synthetic polymers for tissue engineering and regenerative medicine. Investigation of the response of MG63 osteosarcoma cell line to modified surface topographies, mechanical properties and cell-surface interactions using different synthetic polymers fabricated in house with various topographical features
At present there is an extraordinary need to overcome barriers in regards to discovering novel and enhanced biomaterials for various tissue engineering applications. The need for durable orthopaedic implants is on the rise to limit issues such as revision surgery. A promising pathway to enhance …
-
Chain-end functionalization and modification of polymers using modular chemical reactions
… were introduced in both α and ω chain-ends of synthetic polymers. These functionalized polymers could then go through modular synthetic pathways such as click cycloaddition (copper-catalyzed or copper-free) or amidation to couple synthetic polymers to other synthetic polymers, biomolecules or …
-
Control of Surface Chemistry of Gold, Pyrite and Pyrrhotite
… depression of pyrite and pyrrhotite using the synthetic polymers developed by Cytec Industries. The results show that for xanthate/gold system, dixanthogen is the only species that renders the surface hydrophobic. Chemisorbed xanthate is observed on the gold surface but is hydrophilic. The …
-
Determining Single Fiber Nanomechanical Properties of Electrospun Protein Fibers and Modified Fibrin Fibers Using Atomic Force Microscopy
… support of a blood clot. These natural polymers, along with synthetic polymers, can be synthesized outside the body by a process known as electrospinning. Electrospinning can be used to make nanofibers which form the macrostructure scaffold to be tailored to specific applications. The …
-
Polymers and plastrons : active and passive drag reduction in wall-bounded turbulent flows
… drag reduction--the active injection of polymers into the flow, and the passive aerophilic texturing of the wall--and aims to address practical challenges that prevent their widespread adoption in real-life systems, with an emphasis on marine applications. The prohibitive cost of …
-
Computational Studies of Bio-Inspired Synthetic Random Heteropolymers
Biological heteropolymers, such as proteins and nucleic acids, work together to execute the vast suite of tasks which ultimately enable life. These capabilities, particularly enzymatic function, are incredibly attractive for developing sustainable materials, removing pollutants and contaminants, …
-
Assessment of a marine polysaccharide for use as excipient in pharmaceutical hot-melt extrusion
… APIs. Although HME is traditionally utilizing synthetic polymers to produce such dosages, biopolymers constantly gain ground by virtue of renewability, biocompatibility and in some cases biodegradability. In this work, the possibility of using Keltone, a marine polysaccharide derived from brown …
-
Nucleation of Cavities in Gels
Many implantable devices are made of synthetic polymers which upon insertion absorb water, causing the polymer to swell and form a gel (mixture of solid and fluid). Since the swelling leads to an expansion of the polymer, a gel is considered to be a compressible material. A high concentration of …
-
Enzyme catalysed modification of polymers
… investigate the enzyme catalysed modification of synthetic polymers. It was found that an immobilised lipase from Candida antartica (Novozyme 435) catalysed the selective epoxidation of poly(butadiene) in the presence of hydrogen peroxide and catalytic quantities of acetic acid. The cis and trans …
-
Electrospinning of polymeric nanofiber materials : process characterization and unique applications
… diameter can be produced from both natural and synthetic polymers. Despite the large volume of publications on this technology, few publications discuss the mechanics of electrospinning. Most publications deal with the exploratory works on what material can be electrospun and the potential …
-
Development of polynorbornenes and polypeptides as versatile functional biomaterials
… has presented us many examples of the usages of polymers, such as delivery vehicle, recognition unit, support materials, information storage,5 and so on. Scientists have been trying to create synthetic polymers that can mimic such functionalities and bring widespread applications in different …
-
Design of functional polymeric materials for cancer-targeted drug delivery and cellular capture and isolation
Synthetic polymeric materials offer many exciting advantages with the plethora of functionalization techniques affording materials with unique properties, multiple functionalities, and elaborate architectures for a variety of applications. In the drug delivery field, the use of synthetic polymers …
-
Pressure Variation Assisted Fiber Extraction and Development of High Performance Natural Fiber Composites and Nanocomposites
… or kenaf, are comprised of three basic polymers. Just like in wood the polymers are: cellulose, hemicelluloses, and lignin. When subjected to elevated pressures and temperatures, we are able to get access to some of these natural polymers and use them as a matrix material for composite …
Page 1 of 5