Axisymmetric drop shape analysis ADSA

S. Lahooti, O.I. del Rio, A.W. Neumeinn and P. Cheng, Axisymmetric Drop Shape Analysis (ADSA), ch. 10 in the book edited by Neumann and Spelt, mentioned in sec. 1.17c. 

D. Li, P. Cheng and A.W. Neumann, Contact Angle Measurement by Axisymmetric Drop Shape Analysis (ADSA), Adv. Colloid Interface Set 39 (1992) 347, and references to the Neumann group in sec. 5.12 D.Y. Kwok, A.W. Neumann, Contact Angle Measurement and Contact Angle Interpretation, Adv. Colloid Interface Set 81 (1999) 167-249. 

Bashforth F and Adams JC (1883) An attempt to test the capillary action, Cambridge University Press and Deighton Bell Co., Cambridge Chen P, Kwork DY, Prokop RM, del-Rio 01, Susnar SS and Neumann AW (1998) Axisymmetric drop shape analysis (ADSA) and its applications , in Drops and bubbles in interfacial research, D. Moebius and R. Miller Eds., Studies in Interface Science Series, Vol. 6, Elsevier, Amsterdam Dukhin SS, Kretzschmar G and R. Miller R (1995) Dynamic of adsorption at liquid interfaces. Theory, experiments, applications, D. Moebius and R. Miller Eds., Studies in Interface Science Series, Vol. 1, Elsevier, Amsterdam Joos P (1999) Dynamic Surface Phenomena, VSP, Utrecht, 1999 Kovalchuk VI, Zholkovskij EK, Kragel J, Miller R, Fainerman VB, Wiistneck R, Loglio G and Dukhin SS (2000) Bubble Oscillations in a Closed Cell. J Colloid Interface Sci 224 245-254... 

Additional information on interfacial layers can be gained from rheological and ellipsometry experiments. There is quite a number of different experimental setups used to determine surface rheological parameters (27). New possibilities to determine surface dilational parameters arise from oscillating-drop experiments. Using axisymmetric drop shape analysis (ADSA) the change in interfacial ten-... 

Li, D., Cheng, R, and Newmann, A. W., Contact angle measurement by axisymmetric drop shape analysis (ADSA), Adv. Colloid Interface Sci., 39, 347, 1992. 

Interfacial tension was measured using an axisymmetric drop shape analysis (ADSA) method [24]. In this method, interfacial tension is obtained by analyzing the change in the shape of a pendant drop of one liquid suspended in a second liqnid. The method is based on the Bashforth-Adams equation, which relates drop shape geometry to interfacial tension [25,26]. A schematic of a pendant drop with the appropriate dimensions for nse in the Bashforth-Adams equation is illustrated in fig. 13.6. 

Various experimental methods for dynamic surface tension measurements are available. Their operational time scales cover different time intervals [64,65]. Methods with a shorter characteristic operational time are the oscillating jet method [66-68], the oscillating bubble method [69-72], the fast-formed drop technique [73,74], the surface wave techniques [75-78], and the maximum bubble pressme method (MBPM) [57,79-84]. Methods of longer characteristic operational time are the inclined plate method [85], the drop-weight/volume techniques [86-90], the funnel [91] and overflowing cylinder [60,92] methods, and the axisymmetric drop shape analysis (ADSA) [93,94] see Refs. [64,65,95] for a more detailed review. 

The pendent drop or sessile drop method based on Axisymmetric Drop Shape Analysis (ADSA) [18], which is commonly used for surface tension measurement, has been used for measuring the density of pure polymer melts under ambient pressure. The major drawbacks of this method is the inaccuracy associated with determining the boundary of the polymer melt the required accuracy in the density of polymer melts is of three to four decimal points. 

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