11/23/2023 0 Comments Dilatational viscosity definition![]() J Fluid Mech 231:189–210īerry JD, Neeson MJ, Dagastine RR, Chan DY, Tabor RF (2015) Measurement of surface and interfacial tension using pendant drop tensiometry. Springer, Dordrecht, pp 41–43īecker E, Hiller W, Kowalewski T (1991) Experimental and theoretical investigation of large-amplitude oscillations of liquid droplets. Third European rheology conference and golden jubilee meeting of the British society of rheology. J Rheol 45(1):115–138īazilevsky A, Entov V, Rozhkov A (1990) Liquid filament microrheometer and some of its applications. Anziam J 45:C800–C816Īnna SL, McKinley GH (2001) Elasto-capillary thinning and breakup of model elastic liquids. J Colloid Interface Sci 339(2):545–550Īnderssen RS, Husain SA, Loy R (2003) The Kohlrausch function: properties and applications. Graphical abstractĪlexandrov N, Marinova KG, Danov KD, Ivanov IB (2009) Surface dilatational rheology measurements for oil/water systems with viscous oils. Finally, using interfacial shear rheology, we focused on the Trouton correlation between shear and dilational surface rheology, and a direct link between shear surface viscosities and elongational relaxation times was evidenced for the first time and over the entire viscosity range studied. A comparison with capillary breakup extensional rheometry revealed similar overall values to those obtained with the pulse method. ![]() It was found that the evolution of τ with the temperature followed an Arrhenius behaviour. A new approach was developed to determine the dilational relaxation times ( τ) of the studied polymer systems using a square pulse relaxation test. The influence of molecular weight and temperature on the interfacial rheological responses was particularly examined. The interfacial properties in both oscillatory and static drop experiments were carefully corrected, considering the inertia and the contribution of the coexisting phase viscosities during the processing of the numerical data. In the present work, interfacial dilational rheology testing based on the rising oscillating drop method was used to probe surface (and interfacial) properties of model Newtonian polymer melts: polydimethylsiloxane (PDMS)/polyisobutylene (PIB) systems. Nevertheless, direct interfacial rheological measurements in extension devoted to such polymer systems are not plentiful and are often based on indirect modelling methods. During all these manufacturing processes, the elongational flow at interface is predominant. Interfacial rheology has become a powerful tool to study the viscoelastic properties of interfaces in several multiphase polymer-based systems such as multilayer liquids containing surfactants, proteins or solid particles, and also in polymer blends, 3D printed multimaterials and coextruded multilayer films.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |