نتایج جستجو برای: ethylene carbonate
تعداد نتایج: 53462 فیلتر نتایج به سال:
Synthetic biomaterials can be used as instructive biological milieus to guide cellular behaviour and function. To further realize this application, we synthesized a series of structurally similar hydrogels and tested their ability to modulate angiogenesis. Hydrogels were synthesized from poly(DTE-co-x% DT carbonate) crosslinked by y% poly(ethylene glycol) (PEG). Hydrogel desaminotyrosyl tyrosin...
It is now generally agreed that the electrochemical reduction of ethylene carbonate ~EC! plays an important role in the formation of an effective solid electrolyte interface layer on the carbon anode in lithium-ion cells. However, neither the composition of this layer nor the reaction pathways involved in its formation have been clearly established. We report reflectance infrared spectra from a...
In this study, the formation of dicarbonate degradation products ethylene carbonate‐based carbonate mixtures containing dimethyl carbonate, ethyl methyl or diethyl that were combined with lithium potassium metal, is investigated. It shown by NMR and GCMS dioxahexane dioate, dioate are formed from reactants to different extents and, in particular, surface initiates fast corresponding products. E...
We describe a novel approach for the calculation of local electric dipole moments for periodic systems. Since the position operator is ill-defined in periodic systems, maximally localized Wannier functions based on the Berry-phase approach are usually employed for the evaluation of local contributions to the total electric dipole moment of the system. We propose an alternative approach: within ...
The carbonatation of semi-crystalline [ethylene – glycidyl methacrylate]-based polymers (Lotader® grades) was achieved using carbon dioxide as reagent and quaternary ammonium salts organocatalysts to form cyclic carbonate moieties on...
A versatile way of recycling molecular catalysts is presented by using ethylene carbonate (EC) as a solvent in multiphase system. EC liquid at reaction temperature and solid room temperature, trapping the catalyst to enable easy separation.
A new heterogeneous catalyst for CO(2) activation was identified in the Cr(II)/SiO(2) Phillips catalyst, one of the most important catalysts used industrially for olefin polymerization. Interestingly, it was found that Cr(II)/SiO(2) strongly activates CO(2) already at room temperature, making it available for chemicals synthesis. A preliminary attempt in this direction was done by following the...
Glycerol carbonate acrylate is a 5-membered cyclic carbonate synthesized from glycerol that is used as a chemical coupling agent and has proven highly suitable for use in the synthesis of multifunctional polyhydroxyurethanes (PHUs). The multifunctionality of the structure of PHUs is determined by the density of the carbon-amine groups generated by the Aza-Michael reaction and that of the uretha...
Temperature-dependent viscosity, conductivity and density data of ternary mixtures containing 1-ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)azanide (EMIM-TFSA), ethylene carbonate (EC), and lithium bis(trifluoromethanesulfonyl)azanide (Li-TFSA) were determined at atmospheric pressure in the temperature range of 20 to 80 °C. Differential scanning calorimetry (DSC) measurements were pe...
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