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Showing 1 to 20 of 145 for “"miscibility"”.
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Miscibility of polymer blends
… work an attempt is made to correlate polymer miscibility with diffusion and with molecular interactions. A system with lower critical solubility temperature has been selected, namely polystyrene (PS) and polyvinyl methyl ether (PVME). Most of the published work has been done on polymers in …
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Measurement and modeling of fluid-fluid miscibility in multicomponent hydrocarbon systems
… oil recovery. Laboratory evaluations of gas-oil miscibility conditions play an important role in process design and economic success of field miscible gas injection projects. Hence, this study involves the measurement and modeling of fluid-fluid miscibility in multicomponent hydrocarbon systems. …
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Molecular Theory of the Structure, Thermodynamics, and Miscibility of Polymer Nanocomposites
"For systems with finite &phis;, the many body entropic interactions substantially modify the structure of the system. At low epsilonpc, nanoparticle ""imprintation"" on the polymer matrix occurs, rearranging the particles and destroying much of the fine scale structure seen at &phis; ≈ 0. The …
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Miscibility, Viscosity, Density, and Formation of Polymers in High-Pressure Dense Fluids
… are much lower than the pressures reported for miscibility in the mixtures of carbon dioxide with other organic solvents. It is shown that PMMA also readily dissolves at modest pressures. Blends of PMMA and PCL require higher pressures than for the individual polymers for complete miscibility. …
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CO2 Minimum Miscibility Pressure and Recovery Mechanisms in Heterogeneous Low Permeability Reservoirs
… of shale rocks and it may also influence minimum miscibility pressure (MMP), which is an important parameter controlling gas floods for CO2 injection EOR. To investigate this influence, flash calculation is modified with considering capillary pressure and this work implements three different …
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Study of the miscibility, crystallization and morphology in poly(propylene) based blends and copolymers
… It also discusses the results of studies of the miscibility and the competitive liquid-liquid demixing and crystallization processes in blends of poly(propylene) and poly(1-butene). In the first part of this study, polymorphism of propylene-ethylene copolymers is studied by wide angle X-ray …
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Qualitative and Quantitative Technical Criteria for Determining the Minimum Miscibility Pressures from Four Experimental Methods
… and applied to determine the minimum miscibility pressures (MMPs) of different light crude oilCO2 systems from four experimental methods, i.e., the slim-tube tests, coreflood tests, rising-bubble apparatus (RBA), and vanishing interfacial tension (VIT) technique. First, five slim-tube …
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Minimum miscibility pressure as a function of temperature and gas composition using the rising bubble apparatus
Includes bibliographical references (pages 145-151).
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Glassy viscoelasticity of dense suspensions of soft colloids and structure & miscibility of soft filler polymer nanocomposites
… part of the thesis studied the structure and miscibility of soft filler polymer nanocomposites (PNCs). In the first part of the thesis, we have presented the first microscopic theoretical study of activated glassy dynamics in dense fluids of finite range soft repulsive particles (many arm star …
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Drug-Polymer and Drug-Lipid Miscibility for the Development of Amorphous Solid Dispersions and Solid Lipid Nanoparticles
… Investigation of drug-polymer and drug-lipid miscibility was carried out to enhance drug performance by assessing solubility and particle size. Miscibility was then correlated to performance to determine successful preparation of FLT SDs and SLNs.|Four polymers used to prepare SDs included …
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Hydrogen bonding as it relates to miscibility of high performance poly(arylene ether)s with epoxy resins
… epoxy thermosets followed by evaluation of the miscibility of the poly(arylene ether) materials in cured epoxy thermosets. Poly(arylene ether)s were synthesized by reaction of bisphenol A with a variety of dihalo monomers including 4,4’ -difluorodiphenylsulfoxide, 4,4’- difluorodiphenylphosphine …
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Investigating Crystallization Tendency, Miscibility and Molecular interactions of drug-polymer systems for the development of amorphous solid dispersions
… to characterize the crystallization tendencies, miscibility and molecular interaction in drug-polymer systems of poorly soluble drugs and correlate it with the performance of prepared or reported SDs (solid dispersions). Crystallization tendencies of five different drugs [i.e. Curcumin (CUR), …
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Indium-Gallium - Phosphide-Arsenide Quantum-Well Heterostructure Lasers Grown on Gallium-Arsenide Substrate by Liquid Phase Epitaxy (Miscibility)
Light emitting In(,1-x)Ga(,x)P(,1-z)As(,z)-In(,1-x')Ga(,x')P(,1-z')As(,z')quantum-well heterostructure platelet lasers grown on (100) GaAs substrate that are capable of operating continuously at room temperature (cw, 300 K) at a wavelength of 7700 (ANGSTROM), but with a limited operating life, as …
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Statistical mechanical theory of structure and miscibility of polymer nanocomposites: Effects of density, filler shape, and chemical heterogeneity
… theory is applied to study the structure and miscibility of polymer nanocomposites (PNCs). Spherical fillers are studied in homopolymers of varying density and interfacial interaction strengths, with specific favorable comparisons to experimental scattering results. Also discussed briefly are …
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Study of the miscibility, morphology, crystallization, and melting behavior of blends of poly(3-hydroxybutyrate) and poly(vinylidene fluoride)
This thesis reports on the results of thermal, optical, and spectroscopic studies on poly(vinylidene fluoride)/poly(3-hydroxybutyrate) (PVDF/PHB) blends prepared by melt and solution blending techniques. The blends exhibit - a single, composition dependent Tg. Dynamic crystallization studies …
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A study of miscibility, morphology, crystallization and melting behavior of isotactic poly(propylene) in blends of poly(propylene) and poly(1-butene)
In this thesis, the miscibility behavior of blends of polypropylene (PP) and poly(l-butene) (PB1) will be reexamined. The driving force for this study is the fact that contradictory conclusions on this subject exist in the literature. In this thesis, the glass transition behavior, morphology, …
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An investigation of the effects of shearfree deformation and the role of miscibility on the structure and properties of in situ thermoplastic composites
Injection Molding The effects of partial miscibility on the mechanical properties and morphology of thermotropic liquid crystalline polymer blends were investigated in this part of the work. Blends of an immiscible (Vectra A900) and partially miscible (HX1000) thermotropic liquid crystalline …
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Statistical mechanical theory of equilibrium structure and miscibility of polymer nanocomposites: effects of polymer chemical heterogeneity and architecture, and nanoparticle surface corrugation and softness
… the thermodynamics, statistical structure, and miscibility of diverse polymer nanocomposites (PNCs). Under chemistry-matched conditions and in the absence of interfacial attractions between a spherically smooth nanoparticle and the matrix fluid, the polymer-induced depletion attraction is …
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An electron microscopy study of continuous ordering and phase separation in iron-rich iron-aluminum alloys
… where a line of [lambda]- transitions ends at a miscibility gap at about 23 atom percent aluminum and 615°C. Rules of general applicability governing phase separation within the miscibility gap are developed. Application of the rules to the iron-aluminum system results in detailed predictions …
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