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Ultrasonic absorption in binary mixtures of 1-butanol + 1,3-butanediol at temperature 298.15 k
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The absorption of ultrasound in binary mixtures of l-butanol with 1,3-butanedioI andin the pure components was measured at 298.15 K. The both components , i.e. l-butanol (GC>99.5%, H2O < 0.1%, Merck, RFN) and 1,3-butanediol (GC>99%, H2O < 0.2%, Merck-Schuchardt, RFN) were used without further purification. Only the water content was checked by the Karl Fischer dead-point method and found to be no more than 0.06% vol. and 0.01% j vol., respectively. The mixtures were prepared by weighing. The absorption of ultrasound was measured within the frequency range 10-80 MHz using a pulse transmission method. The measuring set designed and constructed at our laboratory f was used. The accuracy of the measurements was estimated to be š5%. For both pure components and all investigated mixtures the quotient alfa/f2 is independent of frequency (within the investigated frequency range); the relaxation times must be | consequently distinctly smaller than (2 . pi . 80 MHz)'1 = 2-10-9 s. The concentration dependence of the mean ultrasonic absorption alfa/f2 is monotonie, alfa/2l increased with increasing concentration of 1,3-butanediol.
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Tom
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297--300
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Bibliogr. 3 poz., rys.
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Bibliografia
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bwmeta1.element.baztech-article-BUJ6-0009-0073