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An example in liquids is the miscibility of water and ethanol as they mix in all proportions. [1] By contrast, substances are said to be immiscible if the mixture does not form a solution for certain proportions. For one example, oil is not soluble in water, so these two solvents are immiscible
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The word upper indicates that the UCST is an upper bound to a temperature range of partial miscibility, or miscibility for certain compositions only. For example, hexane-nitrobenzene mixtures have a UCST of 19 °C (66 °F), so that these two substances are miscible in all proportions above 19 °C (66 °F) but not at lower temperatures.
As shown in the diagram, this means that there is a temperature interval of complete miscibility, with partial miscibility at both higher and lower temperatures. [5] In the case of polymer solutions, the LCST also depends on polymer degree of polymerization, polydispersity and branching [6] as well as on the polymer's composition and ...
Examples of miscible polymer blends: homopolymer–homopolymer: polyphenylene oxide (PPO) – polystyrene (PS): noryl developed by General Electric Plastics in 1966 (now owned by SABIC). The miscibility of the two polymers in noryl is caused by the presence of an aromatic ring in the repeat units of both chains.
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For example, the Kamlet-Taft parameters are dipolarity/polarizability (π*), hydrogen-bonding acidity (α) and hydrogen-bonding basicity (β). These can be calculated from the wavelength shifts of 3–6 different solvatochromic dyes in the solvent, usually including Reichardt's dye , nitroaniline and diethylnitroaniline .
For example, a product removed from the market due to tampering, without evidence of manufacturing or distribution problems, would be a market withdrawal." Medical device safety alert: ...