How to check the relative evaporation rate of a solvent
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How can I check the relative evaporation rate of a solvent? If I use volatilization speed, it expresses an indicator of how quickly a substance volatilizes, rather than vapor-liquid balance, the concept of "volatility" associated with saturated vapor pressure. Thanks!
:lol, it is found in general paint manuals. The volatilization of a single solvent is affected by four factors: temperature, vapor pressure, surface area/volume ratio, and surface air flow rate. Water also depends on relative humidity. The evaporation speed of the solvent is based on n-butyl acetate as the relative evaporation speed of the standard solvent, E=t90 (n-butyl acetate)/t90 (test solvent), t90 represents 25 degrees, the relative humidity is less than 5%, when the air flow speed is 25L/min, 0.70ml of the solvent to be tested is dropped on the filter paper, the filter paper is placed on the balance plate and the time required for 90% of the solvent to evaporate is measured in a closed container. n-pentane 12, propyl acetate 5.7, ethyl acetate 4.0, butyl 3.9, ethanol 1.7, 4-methyl-2-pentane 1.7, isobutyl acetate 1.5, n-butyl acetate 1, n-butanol 0.44, water 0.31, isophorone 0.023. . . . . .