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 27 for “"polymeric films"”.
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Chemical vapor deposition of polymeric films
… chemical vapor deposition (PECVD) of carbon films with PPN structure using PTCDA as precursor were carried out under different conditions. There is only limited information in literature on the synthesis of PPN films by PECVD process, which may allow deposition at a higher rate with lower …
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Molecular and polymeric films formed on silicon by solution-phase reactions
… formation of covalently attached molecular and polymeric films. Silicon is the central material in modern electronic devices, and the ability to tailor its surface, particularly in a hydrogen-terminated form, at a molecular level has been desired. In this research, porous and crystalline silicon …
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Sub-Tg̳, solid-state, plasticity-induced bonding of polymeric films and continuous forming
… The absence of bonding during compression of films in a near hydrostatic setting (which inhibits plastic flow), and between an 'elastic' and a 'plastic' film, further establishes the explicit role of plastic deformation in this newly reported sub-Tg solid-state bonding. Other components of …
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Mechanisms and mechanics of non-structural adhesion
… addressed: an investigation of the cling of thin polymeric films and an analysis of the effects of viscoelasticity on adhesive systems involving curvature mismatch. The results of an investigation into the mechanisms of adhesion and debonding energy associated with the cling between polymeric …
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Effects of nanoscale film thickness on apparent stiffness of and cell-mediated strains in polymers
… properties of compliant materials such as polymeric films and biological membranes that are of nanoscale in thickness are increasingly extracted from scanning probe microscope-enabled nanoindentation. These films are applied in various fields that require multiaxial loading conditions. The …
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Tribopolymerization as an approach to two-stroke engine lubrication
… planned or intentional formation of protective polymeric films directly and continuously on rubbing surfaces to reduce damage and wear by the use of minor concentrations of selected compounds capable of forming polymeric films in situ[12]. Two monomers were investigated as potential anti-wear …
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Preparação e caracterização de blendas formadas por goma xantana e poli (alcóol vinílico) para aplicação na área de liberação controlada de fármacos.
… work was the preparation and characterization of polymeric films xanthan ( GX ) and poly ( vinyl alcohol ) ( PVA ) chemically crosslinked with citric acid (CA ) for further application in controlled release of drugs . Infrared analysis showed possible interactions between the polymers in the blend …
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Pretreatment of Small Four-Stroke Engine Components for No-Oil Hot Tests
… planned or intentional formation of protective polymeric films directly and continuously on rubbing surfaces to reduce damage and wear by the use of minor concentrations of selected compounds capable of forming polymeric films in situ. This study entailed the investigation of the anti-wear …
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Particle sensors based on amplified quenching of conjugated polymers for biosensing applications
… a versatile technique that forms uniform polymeric films through non-covalent interactions. To measure the response of CP core particles in aqueous environments, a quantitative ratiometric approach was developed to account for system fluctuations encountered with particle dispersions. This …
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Mass transport in polymers
The study of mass transport in polymeric membranes has grown in importance due to its potential application in many processes such as separation of gases and vapors, packaging, controlled drug release. The diffusion of a low molecular weight species in a polymer is often accompanied by other …
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Large-scale growth, fluorination, clean transfer, and layering of graphene and related nanomaterials
… (FG) with C4F and CF stoichiometries. FG films seed high-κ HfO2 films better than pristine graphene. An atomically clean nanomaterial transfer method using poly(bisphenol A carbonate) (PC) is developed and benchmarked against alternative transfer scaffolds. A transferred CVD graphene …
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The effects of load and humidity on friction and life of polymeric coatings used to prevent fretting corrosion
… Disks made of 1045 steel were coated with thin polymeric films and fretted against a 52100 steel ball. Three levels of load were used: 11.12, 22.25, and 44.5 N, and the two levels of relative humidity were less than 10% and between 45 and 55%. Amplitude of oscillation was 330 μm peak to peak, …
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The Structure-Function Relationships in Laminated Barrier Films
Polymer films have been used in food packaging since the 195O’s, their useage and application becoming more diverse with the increasing demand for convenience foods. The specific areas of interest to this research program are the polymeric films and laminates used in 'boil-in-bag' manufacture, and …
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Material transfer associated with the contact between polymer and silicon surfaces
… augmented with studies of material transfer from polymeric films (Polyethylene, Teflon, and Kapton) and ceramics (quartz, sapphire and ruby). The variables of interest for the material transfer phenomenon were identified using analysis of elastic contacts (Hertzian) and adhesion. Experimental …
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Adhesion/Diffusion Barrier Layers for Copper Integration: Carbon-Silicon Polymer Films and Tantalum Substrates
… tantalum (Ta) substrates. Carbon-silicon (C-Si) polymeric films have been formed by electron beam bombardment or ultraviolet (UV) radiation of molecularly adsorbed vinyl silane precursors on metal substrates under ultra-high vacuum (UHV) conditions. Temperature programmed desorption (TPD) studies …
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Spectroscopic and optical imaging studies of fullerene complexes and single-walled carbon nanotubes
… in a variety of environments including solid polymeric films and liquid media. SWNT identities are confirmed with spectroscopic and optical anisotropy measurements. Also, we demonstrate optical length measurements of individual nanotubes that were at least several micrometers long. Emission …
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Experimental and Novel Analytic Results for Couplings in Ordered Submicroscopic Systems: from Optomechanics to Thermomechanics
… nanostructured solid/semi-fluid membranes, polymeric nanocomposites, to electromagnetic, mechanical, thermal, and sometimes biological, electrical, and chemical agents. Such actions are notoriously important for sensors, polymeric films, artificial muscles, cell membranes, metamaterials, …
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Preparation and Characterization of Lyophilized Cyclodextrin Complexes of a Hemisuccinate Ester of Delta-9-Tetrahydrocannabinol for Transmucosal Delivery
… required in the development of transmucosal polymeric films of THC-HS with enhanced solubility and stability.
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Computational modeling of laser-induced delamination testing of thin films
… uses laser-generated stress waves to load thin films at high strain rates and extract the fracture toughness of the film/substrate interface. The effectiveness of the technique in measuring the interface properties of metallic films has been documented in previous studies. The objective of the …
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