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Showing 1 to 20 of 189 for “"PEO"”.
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Micellar structures and dynamics in aqueous solutions of PEO-PPO-PEO block copolymers
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1999.
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Application of PEO-PPO-PEO Triblock Copolymers in Synthesis of Silica and Organosilica Nanomaterials
… oxide)-poly(ethylene oxide) (PEO-PPO-PEO), in the synthesis of mesoporous material, such as double-helical silica nanotube structures as well as bridged organosilica nanotubes by using swollen micelles of Pluronic surfactants and their mixtures. Chapter 1 introduced the …
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A study of long time behavior of aqueous solution of polyethylene oxide (Peo) and aqueous salt (potassium sulfate) solution of Peo using dynamic light scattering
… dilute aqueous solutions of polyethylene oxide (PEO) and the properties of dilute aqueous salt (K{dollar}\sb2{dollar}SO{dollar}\sb4{dollar}) solutions of PEO by using the dynamic light scattering technique; The long time study measurement results indicated that the values of the polydispersity …
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PEO-PPO-PEO Surfactant Mixtures as Templates for Silicas With Very Large Cylindrical Mesopores at Ambient Temperature and With Helical Mesopores at Sub-Ambient Temperature
<p>The original research described herein concerns the synthesis of mesoporous silicas through a surfactant-templating method. The approach taken involved the use of a mixed surfactant system of two poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) surfactants, with one of the …
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Morphological Studies of Crystallization in Thin Films of PEO/PMMA Blends
… of thin films of poly(ethylene oxide) (PEO) / poly(methyl methacrylate) (PMMA) blends has been reported. Studies have focused on the effects of the blend composition, PMMA molecular weight, film thickness, and crystallization temperature on the observed crystal morphology. As the blend …
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Investigation of Plasma Electrolytic Oxidation (PEO) Coated Bores in Internal Combustion Engines
… for low-friction Plasma Electrolytic Oxidation (PEO) coatings on cylinder bores in order to reduce the frictional coefficients along the piston ring and cylinder bore sliding surface. For PEO coatings, wear is a limiting factor and this study aims at understanding the main influencing factors for …
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PAA/PEO Comb Polymer Effects on the Rheological Property Evolution in Concentrated Cement Suspensions
… and presence of pure polyelectrolytes and PAA/PEO comb polymers with a wide range of PAA backbone molecular weight, PEO teeth molecular weight, and acid:imide ratio. Cement-PAA suspensions experienced rapid irreversible stiffening and set at 6 min due to ion-bridging interactions between the …
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PEO-containing copolymers as polyurethane soft segments in the development of high performance materials
… were designed with varying poly(ethylene oxide) (PEO)-containing soft segment lengths and hard segment contents. The incorporation of a hydrophobic poly(propylene oxide) (PPO) block and longer soft segment lengths (1900 g/mol) induced a higher degree of micro-phase segregation compared to PEO …
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Estudo da deposição de hidroxiapatita por PEO em amostras de TI CP2 e aço inoxidável AISI 316LVM
… the technique of oxidative electrolytic plasma (PEO), which qualified the life of the biocompatibility of the implants, the increase in the useful life and processes rejection or adverse reactions. Thus, the given work sought to study the influence of some variables of the PEO process in the …
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A study of the effects of lithium perchlorate on poly(ethylene oxide), (Peo) melt dynamic behavior using Fabry-Perot interferometry
Poly(ethylene oxide)/lithium perchlorate (PEO/LiClO4) complexes are widely studied as a prototype solid polymer electrolyte in rechargeable lithium-polymer batteries. Characterizing the structure and dynamics of the system in its molten state is important for understanding the role of the polymer …
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Development of lignin-PEO interlocked composite phase change materials for thermal stability and structural retention in battery thermal management system
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-10-19 without embargo terms
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Synthesis of Amphiphilic Block Copolymers for Use in Biomedical Applications
… systems containing poly(ethylene oxide) (PEO) blocks. The polymer systems were developed for use in biomedical applications. The first of these is a series of poly(ethylene oxide-b-oxazoline) (PEO-b-POX) diblock copolymers for use in the progress towards novel non-viral gene transfer …
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Synthesis and Characterization of Well-Defined Heterobifunctional Polyethers for Coating Magnetite and Their Applications in Biomedicine Resonance Imaging
… included controlled molecular weight cholesterol-PEO-OH, mono- and trivinylsilyl-PEO-OH, monovinylsilyl-PEO-PPO-OH, monovinylsilyl-PEO-PPO-PEO-OH, maleimide-PEO-OH, stearyl alcohol-PEO-OH, propargyl alcohol-PEO-OH, trivinylsilyl-PPO-OH, trivinylsilyl-PPO-PEO-OH, and benzyl alcohol-initiated …
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Crystalline Morphologies of Poly(butadiene)-b-Poly(ethylene oxide) Block Copolymers in n-Heptane
… poly(butadiene)-b-poly(ethylene oxide)(PB-b-PEO) block copolymers was investigated. The crystalline morphologies discussed here have been generated from selective solvent condition (70°C in n-heptane) via two thermal pathways: (A) by direct immersion into liquid nitrogen, where n-heptane …
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Enabling Synthesis Toward the Production of Biocompatible Magnetic Nanoparticles With Tailored Surface Properties
… utilized to prepare poly(ethylene oxide) (BzO-PEO-OH), poly(propylene oxide) (BzO-PPO-OH) and poly(ethylene oxide-b-propylene oxide) (poly(BzO-EO-b-PO-OH)) oligomeric tail blocks with varying lengths of PEO and PPO. The oligomers had a hydroxyl group at the terminal chain end and a …
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Rheological Considerations for Dual-Extrusion Melt Processing of Dissimilar Polymers in Composite Structures
… and LMW resins were both poly(ethylene oxide) (PEO), and the substrate was polyarylsulfone (PAS). The initial focus of this dissertation is to investigate the rheology of PEO when subjected to temperatures beyond which it is known to degrade. Literature indicated PEO undergoes non-oxidative …
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Tribological Behaviours Influenced by Surface Coatings and Morphology
Plasma electrolytic oxidizing (PEO) is an advanced technique that has been widely used in automotive industry to produce ceramic coatings on light metal components due to their high hardness, wear resistance, corrosion resistance and low friction coefficient. In this work, PEO process was used to …
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Synthesis, characterization and properties of epoxide containing block and alternating copolymers
… Poly(ethylene oxide-2-ethyl-2-oxazoline) (PEO) copolymers have been synthesized with poly(ethylene oxide) macroinitiators ranging from O.75K-40K. Monohydroxy functionalized PEO oligomers have been synthesized with potassium tert-butoxide as an initiator in tetrahydrofuran, and in the bulk. …
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Functionalized Polyisobutylene: From Synthesis to Properties and Applications
… of IIR and the grafting of poly(ethylene oxide) (PEO) chains along the polymer backbone, a library of linear PIB-PEO graft copolymers (lin-PIB-g-PEO) was successfully generated containing up to 83 wt% PEO content. The properties of the resulting graft copolymers were studied both on surfaces and …
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Adsorption of Novel Block Copolymers for Steric Stabilization and Flocculation of Colloidal Particles in Aqueous Environments
… acid and tyrosine, and poly(ethylene oxide) (PEO) was studied using an in-situ adsorption experiment. It was shown that the adsorption of the random copolymer greatly increased the adsorption of PEO. It was found that the conformation of the copolymer on the surface was controlled by the ionic …
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