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 34 for “"adhesive strength"”.
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Mechanical Properties of Polymer Modified Mortar
… properties investigated were compression strength and adhesion strength. Compression strength effects did not have an impact on adhesion strength. Adhesion strength was calculated with pullout testing apparatus designed by the author. Results indicate that recycled ABS had a lower adhesive …
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Self-assembling biomimetic hydrogels with bioadhesive properties for tissue engineering applications
… The objective of this work is to generate a bioadhesive polymer that, in addition to bonding with tissue, can support encapsulated cell survival post-adhesion. Thermosensitive poly(N-isopropylacrylamide) (PNIPAAm) was grafted with chondroitin sulfate (CS) (PNIPAAm-g-CS) and blended with …
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A Novel Quantitative Mechanical Test of Atherosclerotic Plaque Stability
… cause of myocardial infarction and stroke. The adhesive strength of the bond between the plaque and the vascular wall, measured as local energy release rate, G, was used for quantitative plaque stability estimation in mouse models. Towards the long-range goal of developing methods to predict …
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Evaluation of concrete patch repairs
… and d) the parameters which influence the adhesive strength of patch repairs. In order to evaluate the efficiency and quality of remote robotic hydroerosion, 4 sets of parameters (concrete, pressure, generating unit, demolishing unit and nozzle parameters) were investigated using 7 series …
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THE SYNTHESIS AND CHARACTERIZATION OF DUAL-MODIFIED CARBOXYMETHYLCELLULOSE FOR BIOADHESIVE APPLICATIONS
… motivated the development of an injectable bioadhesive system containing CMC modified with functional methacrylate and aldehyde groups that could potentially be used as an annulus fibrosus sealant or as a supplement to existing wound closure materials. After modification, the polymer was …
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Structure-property relationships of lignin-based isocyanate and amine adhesives for wood
… (HMMM) to form polyurethane and polyether wood adhesives respectively. Adhesive performance in shear block tests indicated: (a) that the combination of lignin and PHDI reduced the adhesive strength shown by neat PMDI. The HMMM failed to produce an acceptable wood adhesive in the absence of …
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Mediated Patterning of Sol -Gel Thin Layers: Shrinkage, Decohesion, and Lift-Off
… never exceeded 75 MPa. Additionally, interfacial adhesive strength between the substrate and the sol-gel film were evaluated for the first time using a unique pulsed-laser stress-wave technique. An adhesive strength threshold of 15 MPa was determined for sol-gel films on ODTS-functionalized …
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Employment of metal-modified polyimide to achieve optimum conductance at an aluminum joint
… indicate that enhanced conductivity and adhesive strength can be achieved. This research evaluated the employment of metal-modified polyimides to achieve optimum conductance at an aluminum joint. Condensation and addition polyimides were employed. The modification of the polyimides …
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Effect of photoageing and plasticizer content on the mechanical and adhesive properties of polyvinylbutyral
… this study is to characterize the mechanical and adhesive properties of polyvinylbutyral and determine the effect of plasticizer content and photoageing on these properties. This data would be used to understand how the performance of laminated safety glass is related to the choice of adhesive …
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Measuring and Improving Copper-Polyimide Adhesion
… has been used to determine the thermodynamic adhesive strength between nano-sized copper clusters and polyimide. The copper clusters are formed under UHV conditions by using mono-layer per minute deposition rates to assist equilibrium cluster formation. Values of the strength of adhesion from …
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Mechanical designs that explore the applicability of shape memory polymers
… polymers (SMPs) were tested and proven for their adhesive benefits in recent works. A heated dry adhesive system displaying strong adhesive performance on a variety of chemically dissimilar adherend was developed. This thesis explores the mechanical designs and performances of the novel …
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Shape memory polymers as direct contact dry adhesives for transfer printing and general use
… diminutive life on Earth, control over external adhesive forces is crucial for survival. As humans, we pay little notice because at our scale inertial forces typically overwhelm adhesive forces by a wide margin. Nonetheless, the study and development of dry adhesives, which rely on ubiquitous …
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Characterization and requirements for Cu-Cu bonds for three-dimensional integrated circuits
… resulting in an overestimation of the true adhesive strength of the interface.
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Modification, curing and flame retardation of epoxy resin networks
… 15 to 30 weight percent. Improvements in adhesive strength to titanium and fracture toughness were also attributed to the utilization of reactively endcapped polysulfone modifiers and the highest values were obtained with the phase inverted morphology.
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Advanced stamp geometries and adhesiveless transfer printing modalities for use in deterministic materials assembly
… printing efficacy, particularly in ‘dry’ or adhesiveless systems where intimate contact between the substrate and transferred material is desired. This body of work progresses from several simple, passive techniques that demonstrate either strong or weak levels of stamp adhesion for retrieval …
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The Development of Gelatin Based Tissue Adhesives for Use in Soft Tissue Biomedical Applications
… time, diffusion processes, material properties, adhesive properties, and the drying variables on the material and adhesive properties of Gelatin Resorcinol Dialdehyde (GR-DIAL) tissue adhesives by varying formulation. Three adhesive formulations with altered weight content of water and glyoxal (a …
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Mechanical behaviour of adhesive anchors installed in concrete
… characteristics of the mechanical behaviour of adhesive anchors installed in concrete. They are the mechanisms of failure, the relationship between applied pull-out'loadand slip of the anchor and the stresses and strains in each of the three components (steel-resin'-concrete). The study …
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Mechanical Strain-Mediated Syndecan Regulation and Its Effects on Adhesion of Vascular Smooth Muscle Cells
… expression was found to correlate with decreased adhesive strength. Regulation of syndecan-1, syndecan-2, and syndecan-4 gene expression was observed experimentally by mechanical strain of SMCs. Using real-time polymerase chain reaction (PCR), the kinetics of both static and cyclic mechanical …
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Biomimetic adhesion for transfer printing via microstructured surfaces
… of microstructured surfaces intended to control adhesive strength by increasing it and decreasing it, as needed. Finally, I will present the results of our experiments and draw conclusions about the effectiveness and future potential of transfer printing via kinetically controlled microstructured …
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Metal/polymer interactions
… by glow discharge is known to improve their adhesive strength when in contact with a large number of other substances, be they polymeric, metallic, or ceramic in nature. Many efforts have been made to characterize this phenomenon, however in most instances, details concerning the interfacial …
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