Journal ArticleDOI
Effect of shear history on the morphology of immiscible polymer blends
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In this article, the steady state morphology during shear of an incompatible blend can be affected by the initial conditions, by means of rheological experiments, it is shown that below a...Abstract:
In this paper we study how the steady state morphology during shear of an incompatible blend can be affected by the initial conditions. By means of rheological experiments it is shown that below a ...read more
Citations
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Journal ArticleDOI
Microstructural evolution in polymer blends
TL;DR: In this article, a review of the properties of immiscible polymer blends is presented, together with models that describe them and their behavior in high volume fractions or with strongly non-Newtonian phases.
Journal ArticleDOI
Flow induced coalescence of drops in a viscous fluid
TL;DR: In this article, the authors summarized recent experimental studies of flow-induced coalescence of viscous drops in a viscous fluid in the absence of inertial effects, based on visual observations of small drops (20-100 μm diameter) that collide in the linear flows generated by a four-roll mill.
Journal ArticleDOI
Three-dimensional shape of a drop under simple shear flow
Stefano Guido,Marco Villone +1 more
TL;DR: In this article, the deformation of an isolated drop in an immiscible liquid phase undergoing simple shear flow was investigated by using a parallel-plate apparatus, where the drop was observed by video-enhanced contrast optical microscopy, either along the vorticity direction or along the velocity gradient direction.
Journal ArticleDOI
Coalescence suppression in model immiscible polymer blends by nano-sized colloidal particles
TL;DR: In this paper, the effect of nanometer sized silica particles (R≈16mm) on the flow-induced morphology of immiscible polymer blends is studied, and it is shown that the particles alter the sensitivity of the dispersed phase/matrix microstructure to shear flow.
Journal ArticleDOI
The coalescence of two equal-sized drops in a two-dimensional linear flow
TL;DR: In this paper, a four-roll mill was used to experimentally investigate the coalescence of two equal-sized drops in general linear flows, and the experimental results have been compared with approximate theoretical predictions of coalescence, based on an asymptotic theory for small capillary number, where the drops are spherical apart from a small planar deformation at the frontal surfaces between the two drops.
References
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Journal ArticleDOI
Linear rheology of viscoelastic emulsions with interfacial tension
TL;DR: In this article, the average complex shear modulus of the medium accounts for the mechanical interactions between inclusions by a self consistent treatment similar to the Lorentz sphere method in electricity.
Journal ArticleDOI
Linear viscoelastic behavior of some incompatible polymer blends in the melt. Interpretation of data with a model of emulsion of viscoelastic liquids
TL;DR: In this paper, the linear viscoelastic behavior of two-phase polymer blends in the melt has been analyzed by an emulsion model, with takes into account the visco-elasticity of the phases.
Journal ArticleDOI
Interfacial tension between polymer melts measured by shear oscillations of their blends
H. Gramespacher,J. Meissner +1 more
TL;DR: In this paper, the weighted relaxation spectra τH(τ) of polystyrene (PS)/poly(methylmethacrylate) blends show an additional peak with a characteristic relaxation time that is correlated with the interfacial tension.
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Relationship between rheology and morphology of model blends in steady shear flow
TL;DR: In this article, the size of the dispersal phase was calculated using the model of Palierne and Ohta [Rheol. Acta 29, 204 (1990) and the conditions for which the model is valid have been determined and the required constant is obtained by comparing the results with those from the dynamic moduli.
Journal ArticleDOI
Dynamic viscoelastic behaviour of polymer blends in the melt—experimental results for PDMS/POE-DO, PS/PMMA and PS/PEMA blends
TL;DR: In this article, a rheological model for concentrated emulsions of viscoelastic liquids is presented, where the linear visco-elastic behavior of three kinds of polymer blends in the melt could be accounted for quantitatively.