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 10 of 10 for “"Rheological and Mechanical Properties"”.
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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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High Performance Engineering Polymers: Design, Properties, and Performance
… including polysulfones, polyesters, polyimides and polyureas. Copolymers ranging from random to segmented sequences provided insight into the influence of segment length on physical properties. Melting temperatures, glass transition temperatures, and mechanical properties responded …
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Chain Extension of Polyamide-6 & Polyamide-6/Organoclay Nanocomposites. Control of thermal degradation of polyamide-6/organoclay nanocomposites during extrusion using a novel chain extender
… offset thermal degradation of polyamide-6 (PA-6) and organoclay (organically modified layered silicates) nanocomposites during melt compounding have been investigated. In this research, a novel chain extender (Joncryl ADR 3400) has been used to improve thermal stability of PA-6 and PA- …
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3D Bioprinting of High Cell Density Bioink for Chondrogenic Differentiation in Replacement Tracheal Rings
… significantly impacting the quality of life and leading to respiratory distress. The limitations of existing treatment methods, especially for long-segment tracheal stenosis, mean that novel solutions are required to improve long-term outcomes in such cases. In this study, tissue engineered …
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Polypropylene fiber reinforced concrete in railway crossties
… a performance problem that reduces service life and increases maintenance costs. While strong in compression, plain concrete is relatively weak and brittle under tensile stresses. Inclusion of synthetic polypropylene macro fibers in concrete is known to improve crack resistance and is a feasible …
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Synthesis and Characterization of Methacrylated Hyaluronan-Based Hydrogels for Tissue Engineering
… functional groups onto a polymer backbone, the mechanical properties of polymers can be controlled and has the ability to span a wide range of strengths, allowing for application in multiple tissue environments. One such polymer, hyaluronic acid (HA), is a natural polysaccharide found most …
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3D Printing of Soft and Biological Materials: Applications to Human Cochlear Modelling and Beyond
… has emerged as a promising tool for on-demand and rapid fabrication of materials. The field of soft material printing typically utilises inks that exhibit viscoelastic properties with elastic moduli in the kPa – MPa range, such as hydrogels and elastomers. Although soft material printing …
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Model development and validation of bituminous-based crack sealants
… (PI) consisting primarily of adhesive, cohesive, and overband wear. Field samples were collected from the sites to conduct laboratory testing and validate the sealant grading system. According to the field results, most sealants failed below a PI threshold of 70% after three years. In general, …
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A study of Asphalt Aging Behavior Using Molecular Dynamics Simulations
… significantly to asphalt pavement embrittlement and eventually results in excessive pavement cracking. In addition, the performance of asphalt binder is also highly related to its service conditions which involve climatic conditions and traffic conditions, such as temperature, moisture and …