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 “"polymer glass"”.
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Production and characterisation of bioresorbable polymers and polymer-glass composites for application in cardiac stents
Bioresorbable polymeric cardiac stents are a promising technology for treating cardiovascular diseases, but current poly-L-lactide (PLLA) stents have been limited by poor mechanical properties and slow degradation. Materials with increased strength and stiffness are needed, to reduce the required …
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Molecular Simulation Studies of Physical Aging and Rejuvenation in Polymer Glasses
… mobility enhancement that follows deformation of polymer glasses. We show that there are two mechanisms which dictate the mobility enhancement – fold-catastrophe mechanism which reduces the barrier between the minima; and rejuvenation mechanism which moves the system to the regions of the energy …
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Carboxymethylcellulose Acetate Butyrate Water-Dispersions as Renewable Wood Adhesives
… carboxymethylcellulose acetate butyrate (CMCAB) polymers, high and low molecular weight (MW) forms, were analyzed in this study. High-solids water-borne dispersions of these polymers were studied as renewable wood adhesives. Neat polymer analyses revealed that the apart from MW, the CMCAB systems …
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Echogenic Biomaterials for Medical Ultrasound Tracking
… the field of real-time ultrasound tracking of polymeric medical devices, through fabrication of ultrasound responsive polymer-glass composites. Optimal composition will be researched through three complimentary approaches. The first approach seeks to develop a polyurethane-glass microparticle …
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Effect of structure and plasticizer on the glass transition of adsorbed polymer
… A two-component model, based on loosely-bound polymer (glass transition temperature, T<sub>g</sub>, similar to that of bulk) and tightly-bound polymer (T<sub>g</sub> higher than that of bulk) was used to interpret the thermograms. Similar amounts of tightly-bound polymer were found for 450 and …
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Polymer Infiltration Under Extreme Confinement
Polymer nanocomposites with high nanoparticle loadings are ubiquitous in nature but difficult to replicate synthetically. A simple technique to create such polymer nanocomposites is to form a bi-layer of a nanoparticle thin film atop a polymer thin film and anneal above the polymer glass transition …
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Electrical properties of polyimides modified with metal salts
… ion modified polyimide films was found to be the polymer glass transition temperature; a lower glass transition temperature resulted in lower electrical resistivity at a particular temperature. Central to this research work was the design and construction of a sensitive and reliable electrical …
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Polymer Waveguide Amplifiers
Polymer-based optical waveguides are a promising technology for integrating optical links onto standard printed circuit boards as they enable cost-effective manufacturing and assembly as well as offer high bandwidth. The motivation for this work is to address the lack of amplifying components the …
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Renewable Source Thermoplastics
… elongation, while DMA data showed comparable glassy and rubbery modulus for all sets of TPUs. These results indicate that the renewable source Cerenol Polyol would be a viable drop-in replacement for petroleum-based Polyols at for a wide range of applications without sacrificing overall TPU …
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Generation of Recyclable Liquid Crystalline Polymer Reinforced Composites for Use in Conventional and Additive Manufacturing Processes
The application of glass fiber reinforced composites has grown rapidly due to their high strength-to-weight ratio, low cost, and chemical resistance. However, the increasing demand for fiber reinforced composites results in the generation of more composite wastes. Mechanical recycling is a …