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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 18 of 18 for “"high performance polymer"”.
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The mechanical behavior of high performance polymer fibers
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1992.
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Kinetic and mechanistic investigations of polyimide formation and characterization of their blends with polybenzimidazoles
… describes kinetic and mechanistic studies of high performance polyimide formation, synthesis and characterization of fully cyclized, molecular weight and end group controlled polyimides, and investigations of high performance polymer blends based upon polyimides and polybenzimidazole. …
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Polyamide-imide and Montmorillonite Nanocomposites
Solvent suspensions of a high performance polymer, Polyamide-imide (PAI) are widely used in magnetic wire coatings. Here we investigate the effect that the introduction of montmorillonite (MMT) has on PAI. MMT was introduced into an uncured PAI suspension; the sample was then cured by step-wise …
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Functionalized Graphene: Characterization and Mechanical Reinforcement
Polymer nanocomposites with better performance and lower cost are in constant demand. One of the challenges inherent in this field is balancing these two factors. Graphene provides the possibility of producing high performance polymer nanocomposites but is too expensive for adoption in a wide …
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Investigation of polymer waveguides for fully embedded board-level optoelectronic interconnects
… optoelectronic interconnect structure utilizing polymer waveguides and 45-degree micro mirror light couplers. This structure is expected to provide high-speed, large bandwidth, low power dissipation, as well as compatibility to conventional PCB fabrication process, ease of optical alignment and …
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Hybrid light emitting diodes based on solution processed polymers, colloidal quantum dots, and colloidal metal nanoparticles
… light-emitting devices based on polymer, polymer/PbS quantum dot, and polymer/silver nanoparticle hybrid materials. Solution based materials and organic/inorganic hybrid light emitting diodes attracted significant interest recently due to many of their advantages over conventional …
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Polymeric Complexes and Composites for Aerospace and Biomedical Applications
Polymers, among metals and ceramics, are major solid materials which are widely used in all kinds of applications. Polymers are of particular interest because they can be tailored with desirable properties. Polymer-based complexes and composites, which contain both the polymers and other components …
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Structure/Property/Processing Relationships in Poss-Modified High Temperature Thermoplastic Composites
… effective and lightweight fiber-reinforced polymers provide promising alternatives to metal alloys in both the aerospace and automotive industry and have been used in such areas since the 1980s. The majority of these polymer composites are fabricated using thermosetting epoxides due to the …
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Nano-structured materials for optoelectronic devices
… diodes (LEDs), and examine structure-performance relationships in these devices. Short exciton diffusion length limits the efficiency of most exciton-based solar cells. By introducing nano-structured architectures to solar cells, excitons can be separated more effectively, leading to …
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Surface Characterization of Siloxane, Silsesquioxane, and Maleic Anhydride Containing Polymers at Air/Liquid Interfaces
… of LB and Brewster angle microscopy (BAM).Polymer fillers have been shown to reduce the cost and often improve the properties of high performance polymer composites. The utility of POSS as a potential nanofiller in blends with polymers such as poly(dimethylsiloxane) (PDMS) and …
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A Simulation Approach to Thermodynamics in Interfacial Phenomena
Industrial applications such as production of high performance polymer-nanocomposites, semiconductor fabrication, and catalysis involve molecular level phenomena governed by interfacial interactions. Precise control of these interactions will leverage the performance of materials in these …
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Benign Processing of High Performance Polymeric Foams of Poly(arylene ether sulfone)
This work is concerned with the production of high performance polymer foams via a benign foaming process. The first goal of this project was to develop a process and the conditions necessary to produce a low density (>80% density reduction) foam from poly(arylene ether sulfone) (PAES). Water and …
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Comparison of conventional and super-glassy polymers
In the field of gas separation, polymeric membranes are favorable materials. Polymers are inexpensive compared to ceramics and metals, offer a good processability, and possess the ability to operate at large scale. The most important fact about polymeric membranes is their good selectivity. …
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Synthesis and Characterization of New Aryl Phosphine Oxide and Ketone Containing Poly(arylene Sulfide Sulfone)s
High molecular weight poly(phenylene sulfide sulfone) (PPSS) homo- and statistical copolymers have been reproducably synthesized using a known, but complex procedure utilizing 4,4'-dichlorodiphenyl sulfone (DCDPS), sodium hydrosulfide, sodium hydroxide, sodium acetate, and deionized water, in NMP …
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Polímeros funcionales: aplicaciones como sensores y materiales de altas prestaciones
El trabajo que conforma Tesis Doctoral titulada Polímeros funcionales. Aplicaciones como sensores y materiales de altas prestaciones se encuadra en el ámbito científico y tecnológico de los materiales avanzados para aplicaciones específicas. En este marco se han diseñado materiales funcionales con …
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Rapid fabrication of polymers and composites via frontal polymerization
… minor stimuli to effect dramatic change. Frontal polymerization (FP) is an autocatalytic, propagating reaction wave driven by the exothermic polymerization of a monomer. A small thermal stimulus is applied locally to a solution of monomer and initiator, activating polymerization. The …
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Advanced simulations of cross-linked thermoset and conjugated polymers for multifunctional applications
Polymers with diverse mechanical, thermal, and optoelectronic properties are essential for applications in flexible electronics, structural materials, and organic semiconductors. However, understanding the structure–property relationships of these materials remain challenging due to complex …
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3D printing of semi-crystalline high-performance polymers for localized production
L'abstract è presente nell'allegato / the abstract is in the attachment