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Showing 1 to 20 of 59 for “"Polymer and Organic Materials"”.
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Synthysis of polymer/nano-droplet composites from reverse microemulsion polymerization
<p>L<sub>1</sub> and L<sub>2</sub> domains of the water/AOT/MMA ternary system were investigated at 22±1°C. Free radical polymerizations were conducted in L<sub>2</sub> domain. Only opaque polymer rods were obtained. Acrylamide, a water soluble monomer, plays a role of co-surfactant which greatly …
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Material Coefficient of Thermal Expansion Investigation for Use in Additive Manufacturing Fused Deposition Modeling for Composite Tooling
<p>Polymer matrix composites are being used to manufacture light weight, high stiffness aircraft structures. These structures are often manufactured from carbon fiber reinforced epoxy. When these structures are damaged, they must be repaired to restore strength to the component to avoid the cost …
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Rheological characteristics of solvent free nanofluids: Thermal transitions and reactive curing
<p>Solvent-free nanofluids are a new and exciting class of material that evolved to address the limitations of their predecessors, nanocomposites. One of the most exciting aspects of solvent-free nanofluids is the wide range of tools chemists have to build and study them. Understanding how the …
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Materials and coatings derived from the polymerizable ionic liquid surfactants 1-(2-acryloyloxyundecyl)-3-methylimidazolium tetrafluoroborate and 1-(2-acryloyloxyundecyl)-3-methylimidazolium 2-acrylamido-2-methyl-propylsulfonate
<p>Polymerizable ionic liquid surfactants were synthesized and polymerized, yielding engineered advanced polymers that can be tailored for diverse applications. First, 1-(2-acryloyloxyundecyl)-3-methylimidazolium tetrafluoroborate (IL-BF<sub>4</sub>) was synthesized and was copolymerized with …
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Structure and Property of Polymers and Biopolymers from Molecular Dynamic Simulations
<p>Natural and synthetic polymers and biopolymers have been studied for a variety of applications in food emulsion, biopharmaceutical purification, tissue engineering, and biosensor. The structure and property of polymers and biopolymers are critically important to determine their functions. …
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Investigation on the Morphology of Charge-Transfer Complexes in Low Density Polyethylene
… are used ubiquitously throughout the fields of polymer and material science to overcome many inherent limitations to polymeric materials (i.e. poor stiffness or strength) and to expand their potential applications. There is a need to develop controllable particle architectures to better …
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Interfacial Thermomechanical Behavior of Hybrid Carbon Fibers
… reduces the risk of failure at the interface and improves the load transfer to the fiber. In this study, two types of nano-species ZnO nanowires and nickel-based metal organic frameworks were grown on carbon fibers to improve the interfaces. The interfacial mechanics of the enhanced fibers are …
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A Least Squares Closure Approximation for Liquid Crystalline Polymers
… Doi-Hess kinetic theory of liquid crystalline polymers is provided. A new closure scheme is devised based on a least squares fit of a linear combination of the Doi, Tsuji-Rey, Hinch-Leal I, and Hinch-Leal II closure schemes. The orientation tensor and rate-of-strain tensor are fit separately …
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A feasibility study of a surface modification method for polyolefin plastics formed by injection molding
… polyethylene, thermoplastic olefin i.e. TPO and blends) articles formed by injection molding have been found to have many useful applications. Many costly and/or hazardous methods are employed to increase the surface energy to a level that promotes the ability of a coating or adhesive to make …
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Chitosan Graphene Composite Fabrication and Characterization for Treatment of Harmful Algal Blooms and Toxins
<p>Chitosan graphene composites were fabricated and characterized as a management strategy for harmful algal blooms (HABs) caused by various species of cyanobacteria. These chitosan graphene materials were compared to previously studied chitosan graphene-oxide composites in both material properties …
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Structure-Property Evaluation of the Dielectric Properties of Radar Absorbing Materials in Free Space
<p>Since WWII, radar absorbing materials (RAMs) have been extensively used in asset protection by militaries around the world. By manipulating the dielectric properties, i.e. permittivity, e, and permeability, m, of materials through the incorporation of highly conductive additives, RAMs reduce the …
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Surfactant Formulations for Water-Based Processing of a Polythiophene Derivative
<p>Conjugated polymers are semiconducting materials that are currently being researched for numerous applications from chemical and biological sensors to electronic devices, including photovoltaics and transistors. Much of the novel research on conjugated polymers is performed in academic settings, …
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Cross-Linked PDMS Expansion Due to Submersion in Liquid and Supercritical CO2
… micro-corrosion sensor technology utilizing PDMS and micro-metal particle composite as the sensing element currently under-development. One of the key challenges encountered was the removal of the native oxides inherently existing on the metal particles. Numerous techniques were experimented with …
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Aging Assessment of High Voltage Single Component Room Temperature Vulcanized Silicone Rubber (RTV-1) Subjected to Aqueous Salt
… based caulk used in high voltage insulators and other applications is frequently subjected to environmental pollutants. Aging of RTV-1 silicone rubber is the result of various stressors, including environmental aging conditions such as UV, acid, and salt exposure from ocean mist. Loss of …
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