A5040619932- Rheology and Fluid Dynamics Studies
- Polymer crystallization and properties
- Polysaccharides Composition and Applications
- Polymer Nanocomposites and Properties
- Surfactants and Colloidal Systems
- Proteins in Food Systems
- Liquid Crystal Research Advancements
- Fluid Dynamics and Heat Transfer
- Polysaccharides and Plant Cell Walls
- Innovative Microfluidic and Catalytic Techniques Innovation
- Pickering emulsions and particle stabilization
- Material Dynamics and Properties
- Food composition and properties
- Polymer Foaming and Composites
- Electrohydrodynamics and Fluid Dynamics
- Block Copolymer Self-Assembly
- Particle Dynamics in Fluid Flows
- Advanced Polymer Synthesis and Characterization
- Fluid Dynamics and Thin Films
- Epoxy Resin Curing Processes
- Conducting polymers and applications
- biodegradable polymer synthesis and properties
- Polymer composites and self-healing
- Microfluidic and Capillary Electrophoresis Applications
- Advanced Sensor and Energy Harvesting Materials
KU Leuven
2016-2025
Center for Rheumatology
2018
Université d'Orléans
2010
Interfaces, Confinement, Matériaux et Nanostructures
2010
Eindhoven University of Technology
2010
Mahatma Gandhi University
2009-2010
Leibniz Institute of Polymer Research
2010
Centre National de la Recherche Scientifique
2010
University of Potsdam
2009
University of Massachusetts Amherst
2008
▪ Abstract Microstructure in an immiscible polymer blend consists of the size, shape, and orientation phases. Blends exhibit many interesting behaviors, including enhanced elasticity at small strains, drop-size hysteresis, shear thinning, stress relaxation curves whose shapes are sensitive to deformation history. These behaviors directly related changes microstructure, which result from phase deformation, coalescence, retraction, different types breakup. phenomena reviewed, together with...
Immiscible polymer blends display a complex flow behavior caused by the coupling between morphology and rheology. The induced microstructure has been studied on model systems of nearly inelastic polymers. For these systems, elastic properties blend are mainly governed interface. Measurements storage modulus first normal stress difference, both reflecting this enhanced elasticity, have used to probe morphology. From oscillatory measurements after cessation mean diameter disperse phase, as...
The controlled generation of 2D aggregate networks is studied experimentally using micrometer-sized polystyrene latex particles attached to the oil-water interface. Starting from an initially crystalline monolayer, appropriate combinations carefully added electrolyte and surfactant enable control over both fractal dimension kinetics aggregation. Remarkably, colloidal crystals formed upon first spreading remain stable, even for days, when substantial amounts are aqueous phase. Pressure-area...
The magnetic interfacial needle stress rheometer is a device capable of sensitive rheological measurements. Yet even for this device, when measuring interfaces with low elastic and viscous moduli, the system response instrument contributes significantly to measured response. To determine operation limits rod rheometer, we analyze relative errors that are introduced by linearly subtracting contribution from An analysis fluid mechanics demonstrates intimate coupling between flow field at...
Blending of two or more immiscible polymers is an attractive route to generate new materials. However, during processing in the liquid state, flow-induced microstructure changes continuously due a complex interplay between break-up and coalescence, typically resulting coarse morphology with poor properties. Hence, need stabilize fine obvious block copolymers are used as compatibilizers. The use nanoparticles has been suggested be alternative 'compatibilize' polymer pairs. In present work,...
Polyacrylamide (PAM) hydrogels are commonly used as substrates for cell mechanical and mechanobiological studies because of their tunable stiffness ease handling. The dependence bulk rheological local elastic properties (assessed by Atomic Force Microscopy) PAM on its composition polymerization temperature has been extensively studied. swell when immersed in media, but the influence swelling is poorly characterized. We report here, first time, direct measurements volumetric gels throughout...
Interfacial rheology is crucial in dictating morphology and ultimate properties of particle-stabilized polymer blends, but challenging to be determined. In this study, a fully polymeric dumbbell-shaped Janus nanoparticle (JNP) polymethyl methacrylate (PMMA) polystyrene (PS) spheres with equal sizes (∼80 nm) was prepared used as an efficient compatibilizer for PMMA/PS blends. The JNPs were preferentially localized at the interface, thereby reducing interfacial tension refining both...
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Ellen Van Hemelrijck, Peter Puyvelde, Sachin Velankar, Christopher W. Macosko, Paula Moldenaers; Interfacial elasticity coalescence suppression in compatibilized polymer blends. Journal of Rheology 1 January 2004; 48 (1): 143–158. https://doi.org/10.1122/1.1634987 Download citation file: Ris (Zotero) Reference...
In this paper we study how the steady state morphology during shear of an incompatible blend can be affected by initial conditions. By means rheological experiments it is shown that below a critical rate multiple states obtained, final being then determined conditions blend. Above univocally equilibrium between break-up and coalescence. The identified as value at which limiting curve crosses coalescence one. applicability different theories has been investigated changing viscosity ratio. all...