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 20 of 62 for “"polymeric systems."”.
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Dielectric studies of novel polymeric systems
… stress field. A variety of new, well controlled polymeric systems were studied. The first series included a number of radial starblock copolymers, styrene/isoprene, t-butyl- styrene/isoprene, and t-butyl-styrene/butadiene. These ABA copolymers consisted of hard and soft blocks, with the soft …
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Force-induced mechanochemical reactions in polymeric systems
… molecule) incorporated into different polymer systems. The SP mechanophore converts to a colored and fluorescent merocyanine (MC) form upon the application of heat, UV light, or mechanical force, when linked into a polymer backbone. The SP to MC (activation) reaction is also reversible, and can …
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CONFINED LAYERED POLYMERIC SYSTEMS FOR PACKAGING ANDCAPACITOR APPLICATIONS
… the structure-property relationships in layered polymeric systems for applications including confined crystallization for high gas barrier applications and multilayer dielectric films for high energy density capacitors.CHAPTER 1: A review of recent progress of confined polymer crystallization …
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Single-chain polymeric systems: design, synthesis, and applications
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-05-01
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Morphological studies of polymeric systems with liquid crystalline order
… and processing of various liquid crystal polymer systems. Morphologies of microphase separated side chain liquid crystal block copolymers are determined, both in the bulk and when confined to thin films. We show for the first time how these materials could potentially be used as a novel kind of …
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Understanding the Mechanisms of Shock-Induced Deformation in Polymeric Systems
… This thesis focuses on the study of polymeric materials, which often outperform traditional materials in terms of shock energy absorption. The vast design space of polymers affords them a diverse set of physical properties and adaptability to different applications. Researchers can …
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Anionic synthesis and characterization of alkyl methacrylate containing polymeric systems
… to synthesize a variety of well-defined polymeric materials. Small variations in polymerization conditions drastically affect the properties of the polymers obtained. However, the effects depend largely upon the size of the ester alkyl group involved. The subtle relationships among such …
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Cucurbit[n]uril-based colloidal self-assembly in hybrid polymeric systems
… hybrid ‘raspberry-like’ colloids, catalytic polymeric nanocomposites, advanced structured colloids, and supramolecular polymer colloidal hydrogel.
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Novel potentials for the simulation of polyethylene and other polymeric systems
… materials. Since computer modeling of atomic systems does not predate computers, it is still in its childhood, requiring further investigations. In order to further the development of computer modeling and a general understanding of reality, novel model algorithms for the simulation of …
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Structure-property relationships of electron beam irradiated monomeric and polymeric systems
… for electron beam(EB) irradiated monomeric and polymeric systems. The objectives were to study the feasibility of preparing systems of potential application, and to characterize these systems in terms of structure-property behavior. In this thesis, the basic theories on radiation chemistry were …
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Development and characterization of advanced nitric oxide-delivering polymeric systems against cardiovascular complications
… characterization of nitric oxide (NO) delivery systems for the prevention of cardiovascular complications. Calcium concentrations were similar in aortic and pulmonary native leaflets, but 10-25% higher in the native pulmonary sinus (p=0.0018) and artery (p<0.0001) compared to analogous aortic …
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Numerical studies of phase transitions and critical phenomena in fermionic and polymeric systems
In this thesis we study three problems in phase transitions and critical phenomena.
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The Effects of Molecular Architecture on the Rheological and Mechanical Properties of Polymeric Systems
The roles of molecular architecture and end-group functionality on the surface segregation characteristics of branched polymers in blends with commercially available linear polymers were also investigated. In the blends of branched PEIs with polystyrene (PS), the surface migration of PEIs …
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Renormalization-group studies of disordered magnetic systems, strongly correlated electonic systems, and polymeric systems
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Physics, 1999.
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A time-resolved framework for structure-property-processing relations of polymeric systems using recovery rheology
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Synthesis of Small Molecule and Polymeric Systems for the Controlled Release of Sulfur Signaling Molecules
… mammalian cells. To this end we report on two systems for the sustained release of H₂S, as well as other sulfur signaling molecules. The first system discussed is based on the N-thiocarboxyanhydride (NTA) motif. NTAs were demonstrated to release carbonyl sulfide (COS), a potential sulfur …
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Single Molecule Force Extension Measurement on Semi-Flexible Biopolymers Using Magnetic Tweezers
… assay can be further used to study novel polymeric systems, such as chemically-modified single stranded DNA, a flexible polymer. Overall, the research presented in this thesis provides the groundwork for novel investigation of novel polymeric systems at the single molecule level.
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Effect of Process Parameters and Material Attributes on Crystallisation of Pharmaceutical Polymeric Systems in Injection Moulding Process. Thermal, rheological and morphological study of binary blends polyethylene oxide of three grades; 20K, 200K and 2M crystallised under various thermal and mechanical conditions using injection moulding
… the main factors affecting crystallisation of a polymeric system, processed via injection moulding, was presented and a sample of response optimisation was introduced which can be mimicked to suite a specific need. Three grades of pure polyethylene oxide; 20K, 200K and 2M, were first …
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Fluctuation theorems and work relations for single polymer rheology
"Synthetic and biological polymeric materials are ubiquitous in nature and modern technology. The emergent properties afforded by these materials allows for wide a array of applications as found in adhesives, coatings, and synthetic polymers for plastics. Importantly, the molecular properties of …
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Biomasses for the obtainment of new functional polymer materials
… of work dedicated to the development of new polymeric systems based on the use of raw materials derived from biomasses. Biomasses are a very versatile renewable energy source with low environmental impact and are less expensive than the resources deriving from petroleum. Furthermore, the use …
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