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 49 for “"Polymeric composites."”.
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Design of Improved Ceramic/polymeric Composites
… new coupling agent for glass fiber/epoxy matrix composites. This interface consisted of a thin coating of activated carbon (ACI) with high surface area to take advantage of mechanical interlocking. Furthermore, the surface chemistry was modified to provide varying degrees of bonding to the resin. …
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Micromechanics of toughening in polymeric composites
… polycarbonate (PC)]. Judicious choice of polymer composites alleviates the above concerns by spreading the inelastic deformation and damage throughout the material, thereby increasing the macroscopic toughness. This thesis focuses on the micro- and macro-mechanics of two polymer composite systems …
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Fatigue response of fabric reinforced polymeric composites
Fiber Reinforced Polymeric (FRP) Bridge decks have been an active area of research for the past 10 yrs. In order to better understand the long term efficiency and reliability of FRP bridge decks, and to develop design and test specifications, laboratory testing and characterization of the deck …
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Aging of polymeric composites : a literature review
… far, discovered as to the effects of aging on polymeric composites. Special emphasis was placed on composites with vinyl ester as the matrix reinforced with glass or carbon fibers. Moisture exposure, thermal conditioning, and cyclic loading were the aging mechanisms used to mimic environmental …
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Solvent induced microcracking in high performance polymeric composites
… in High-Performance Thermoplastic Polyimide Composites”, studied the possibility of spurious microcracking in three high-performance thermoplastic polyimide composite materials due to zinc iodine dye penetrant. The material systems were IM7/LaRC™-IAX, IM7/LaRC™-IAX2, and IM7/LaRC™-8515. …
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Mechanical Property Characterization of Polymeric Composites Reinforced by Continuous Microfibers
… on the potential properties of the composites. Experimental techniques are employed to understand the effects of various fibers, their volume fractions and matrix properties in polymer composites. However, these experiments require fabrication of various composites which are time …
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Nanostructured electroactive polymeric composites for energy storage and separation applications
Electroactive polymeric materials have garnered considerable interest due to their potential applications in advancing electrochemical energy storage, sensing, catalysis, and separations systems. Electroactive polymers include conducting polymers with a-conjugated backbones and redox polymers with …
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Reduction of friction in polymeric composites for artificial joint prostheses
Ultra-high molecular weight polyethylene has been used as a bearing material in artificial joints for more than thirty years. Despite this long period of use and the success which artificial implants have had, material failure and ultimately prosthetic failure still occurs as the result of …
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Processing and Properties of New Anisotropic and Mechanically Active Polymeric Composites
… this work to develop highly anisotropic fibrous composites. Previous work has detailed the properties of using electrospinning to fabricate fibrous anisotropic composites that was achieved by embedding stiff fibers in an elastomeric matrix. The goal of this work is to achieve anisotropic …
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Thermally/Mechanically Responsive Polymeric Composites with Shape Memory/Self-Healing Properties
… novel thermally and mechanically responsive polymeric composites for several industrial applications.</p> <p>In Chapter 2, the curing kinetics and polymerization induced phase separation (PIPS) of an epoxy matrix with and without a semicrystalline thermoplastic was investigated. Same PIPS …
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Mode I Delamination Fracture Characterization of Polymeric Composites under Elevated Temperature
… of the major failure modes seen in the laminated polymeric matrix composite (PMC). Accurate prediction of delamination initiation and propagation is important for the design and analysis of robust composite structures. Existing experimental methodologies that are based on linear elastic fracture …
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Interphase properties and their effects on the compression mechanics of polymeric composites
Experimental and analytical investigations have shown that the interphase, with properties different from either the fiber or matrix, has a considerable influence composite material strength. The greatest obstacle, however, to this work lies in identifying the specific properties present in the …
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Durability of Chopped FiberReinforced Polymeric Composites for use in Experimental Automotive Fuel Cells
… and automatic transmissions. The use of polymer composites in fuel cells to serve as manifolds is promising because of their high strength to weight ratio, and they do not corrode like metals manifolds. Composite materials designed for use in Polymer Electrolyte Membrane (PEM) Fuel Cells are …
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Introducing Advanced Conductors and Semiconductors in 3D polymeric composites for further electronic & photocatalytic applications
L'abstract è presente nell'allegato / the abstract is in the attachment
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Simulation of Fatigue Performance & Creep Rupture of Glass-Reinforced Polymeric Composites for Infrastructure Applications
… of the fatigue of glass fiber-reinforced composites is achieved by replacing the constant stress parameter in the model with a sinusoidal wave function. Results from the creep rupture model using fused silica fiber parameters, compare well with S-2 glass/epoxy systems. Results using …
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The effect of environmental aging/exposure on the durability of high performance polymeric composites
High-performance polymeric composites are currently being considered as state-of-the-art material systems for future supersonic aircraft and space structures. However, the long-term durability and environmental stability of these materials continue to be under question. Continued application of …
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In situ curing of polymeric composites via resistive heaters comprised of aligned carbon nanotube networks
The widespread application of polymer matrix composites (PMCs) has encouraged the use of nanofibers, especially carbon nanotubes (CNTs), to concurrently enhance the physical properties of such composites while adding multi-functionality. However, current-generation manufacturing routes of PMCs have …
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Synthesis and characterization of ultra violet curable renewable polymer graphite composites
… (UV) curable renewable polymer graphite (RPG) composites. Accordingly, the renewable polymeric composites were prepared through a film slip casting method at room temperature wherein graphite particles of various weight loadings were mixed with mass proportion 2:1 of renewable monomer and …
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Synthesis and characterization of polyaniline/magnetite nanocomposites for fabrication of nanofiber textile
Polymers nanocomposites containing inorganic fillers like metal particles dispersed in the polymer matrix are of great interest for the optical and dielectric application. Polymer/inorganic composites such as polyaniline/magnetite nanocomposites (PAni/Fe3O4) can be manipulated through various …
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Semiconductor nanocrystals for novel optical applications
… of enhanced spectral response, photorefractive polymeric composites photosensitized with semiconductor nanocrystals have emerged as an important class of materials. Here, we report on the photosensitization of photorefractive polymeric composites at visible wavelengths through the inclusion of …
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