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Showing 1 to 20 of 24 for “"propylene carbonate"”.
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Heterogeneous catalysis in the different reactor types on the examples of ethyl benzene to styrene, methane dehydroaromatization and propylene carbonate, methanol transesterification
… a way to produce the “green” reagent, dimethyl carbonate (DMC), through transesterification of propylene carbonate (PC) and methanol in the vapor phase. The importance of DMC for the development of variety of green syntheses is widely described. The reaction conditions and the catalyst …
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STRUCTURAL, ELECTROCHEMICAL AND THERMAL STUDIES OF DIVALENT POLYMER ELECTROLYTES
… PEO. Plasticised samples of PEO30:PCn:ZnX2 (PC=propylene carbonate; m=3.3 and 6.7; X=Cl,Br,I> were prepared. None of the films were tacky and, although they were quite flexible compared to films prepared without PC, all of them were mechanically strong. The addition of propylene carbonate …
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Isocyanate-free synthesis of (functional) polyureas, polyurethanes, and urethane-containing copolymers
… such as diamines, amino alcohols, diphenyl carbonate, ethylene carbonate, 1,2-propylene carbonate, gamma-butyrolactone, and glycerol. Several synthetic routes using AA- or AB-type monomers are presented, and the polymers obtained are characterized by means of NMR, GPC, DSC, and TGA.
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Effects of a combined supercritical extraction/thermal cycle on binder removal cycle time, yield, residual carbon, and defect formation in multilayer ceramic capacitors
… systems evaluated were plasticized acrylic, poly(propylene carbonate), and poly(vinyl butyral) binders. The effect of temperature on binder removal and defect formation are assessed.
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Diffusion coefficient measurements and other investigations using the methods of twin-electrode thin-layer electrochemistry
… (acidified acetonitrile, N,N-dimethylformamide, propylene carbonate) with 0.1M TEAP as supporting electrolyte. Diffusion coefficients for the electroactive species were obtained, and electron-transfer characteristics of the redox systems were observed.</p> <p>The dependence of the diffusion …
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Zur rhodiumkatalysierten Hydroformylierung von Octenen : neue Ligand- und Lösungsmittelkonzepte
… solvent systems, systems composed of propylene carbonate as polar component, n-dodecane as non-polar component and polyethylene glycol dimethyl ethers of different chain lengths as middle-polar components have been developed and their use in the n-selective hydroformylation of …
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Development of Property Prediction Methods for Sodium-ion Battery Electrolytes
… structures and infrared vibrations. Three carbonates were used as solvent molecules for this study - propylene carbonate (PC), dimethyl carbonate (DMC) and ethylene carbonate (EC). A larger B3LYP/6-311++G** basis set was used to optimize the geometry and compute the vibrational spectrum of …
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Electrolyte Dependence on the Electrochemical and Optoelectronic Activity of a Conjugated Polymer in Organic Solvents
… dependence (SRD) experiments. A regiosymmetric propylenedioxythiophene-based polymer was used to prepare solid-state films to measure electrochemical responses based on systematically varying the electrolyte identity by cationic and anionic dependence, dissolved in acetonitrile (ACN) or …
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Electronic properties of nano and molecular quantum devices
… (MES), 1,2,4- trichlorobenzene (TCB), and propylene carbonate (PC). In mesitylene, a lower conductance is obtained across the whole series with a higher length decay (β ≈ 1 nm−1). In contrast, measurements in 1,2,4-trichlorobenzene and propylene carbonate give higher conductance values with …
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Testing and characterization of carbon nanotubes as strain sensors
… of cloth inside a 1mg/ml carbon nanotube in propylene carbonate solution. A dynamic mechanical analyzer was built that applied uniaxial cyclical strains to the samples and recorded the force and strain applied. The DMA also provided a constant voltage to the samples while recording the …
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PEDOT Electrodes as Redox Mediators for Determination of Antioxidants in Beverages
… (EDOT) and 0.1 M lithium perchlorate in propylene carbonate (PC) using cyclic voltammetry at 1 mm dia. electrodes. Glassy carbon and gold electrodes substrates were tested and better results were obtained with the glassy carbon electrode. Polymerization was performed using different …
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Synthesis and Characterization of High Performance Polymers for Gas Separation and Water Purification Membranes and as Interfacial Agents for Thermplastic Carbon Fiber Composites
… were investigated. Low molecular weight poly(propylene carbonate) (PPC) and poly(ethylene oxide) (PEO) were incorporated as sacrificial additives that could be removed via a controlled heat treatment protocol. PBI films containing 7 and 11 wt% PPC (blend) and 13 wt% PEO (graft) were fabricated …
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Composite Gel Polymer Electrolyte for Lithium Ion Batteries
… consisting of poly (vinylidene fluoridehexafluoropropylene) (PVdF-HFP) as the membrane, dimethylformamide (DMF) and propylene carbonate (PC) as solvents and plasticizing agent, mixture of charge modified TiO2 and SiO2 nano particles as ionic conductors, and LiClO<sub>4</sub>+LiPF<sub>6</sub> as …
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Electroosmotic Soft Actuators
… was eliminated by replacing water with propylene carbonate (PC): PC was determined to be electrochemically stable up to at least 10 kV, in the absence of moisture or salt contaminants. Bubble-free electroosmotic pumping with PC was achieved within sealed miniature actuators, which could …
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3D Printable Lithium Ion Batteries and the Effect of Aspect Ratio of CuAg Nanowires on Graphite Anode Performance.
… can be infused with a mixture of ethyl methyl carbonate, propylene carbonate, and LiClO4 provides an ionic conductivity of 2.3 x 10−4 S cm−1 which is comparable to that of polymer and hybrid electrolytes (10−3 to 10−4 S cm−1). It was found that up to 12-30 volume % of solids, depending on the …
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Spectroscopic and thermal analysis of clay mineral-organic composites.
… VFA and then treated with a polar activator (Propylene Carbonate) prior to polymerisation. The polar activator interacts with the bifunctional VFA molecules causing the clay to swell further prior to polymerisation. This produces significant differences in the XRD traces with and without …
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Poliaspartiniai dažai metalinių ir medinių paviršių dangoms /
… relatively large amounts of the "green" solvent propylene carbonate (PC) and polyaspartic reactive thinner (PRS). It was determined, that in order to avoid defects, it is necessary to replace part of PRS with unshielded polyaspartic acid ester (NARE). Paints containing larger amount of NARE and …
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RNA Interference for Improving the Outcome of Islet Transplantation and Polymeric Micelle‑based Nanomedicine for Cancer Therapy
… glycol)‑block‑poly(2‑methyl‑2‑carboxyl‑propylene carbonate‑graft‑dodecanol) (PEG-PCD) lipopolymers were synthesized and characterized by <sup>1</sup>H NMR, FTIR, GPC, and DSC. The critical micelle concentration (CMC) of PEG‑PCD micelles was around 10<sup>-8</sup> M and decreased with …
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Investigating the Interaction of Chitin in Organic Electrolyte Solutions Using Molecular Dynamics
… validation. The co-solvents chosen were dimethyl carbonate, propylene carbonate and γ-valerolactone, three structurally similar bio-based solvents. The solvation of a (GlcNAc)2Me2 monomer was also studied in this project via radial distribution functions, interaction energies and hydrogen bond …
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Controlled emulsion droplet solvent evaporation for particle production
… using a model system of polystyrene (PS), poly(propylene carbonate) (PPC) and chloroform. The phase separation of the polymer solutions in the bulk is analyzed and a phase diagram is constructed. PS/PPC Janus beads of varying composition are synthesized and we demonstrate the ability to tune the …
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