Effects of viscosity ratio and composition on development of morphology in chaotic mixing of polymers

Jana, Sadhan C.; Sau, M.

doi:10.1016/j.polymer.2003.12.047

Cited by 68 publications

(33 citation statements)

References 46 publications

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“…The interplay here between the chaotic flow and the interfacial tension, viscosity, rheology, reactivity-in general all of the properties-of the component materials is subtle (see for example Jana and coworkers, 34,35 ) and only at the beginning of understanding-for example, we cannot specify in advance a target arrangement (other than the homogeneous arrangement) of components and then solve the inverse problem for the chaotic flow regime to realize the structure-but already material structures have been realized that can be created in no other way than by chaos. In this paper we will give experimental examples mainly for well-mixed states.…”

Section: Introductionmentioning

confidence: 99%

Composing chaos: An experimental and numerical study of an open duct mixing flow

et al. 2005

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Section: Introductionmentioning

confidence: 99%

Composing chaos: An experimental and numerical study of an open duct mixing flow

et al. 2005

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“…For example, small droplets in the morphology map of was reported in PP-nylon blends at 10% and 30% by weight PP using a batch chaotic blender. 58 Progressive morphology development occurred in that specific morphology types were correlated to the extent of chaotic advection imposed in the batch device.…”

Section: Materials Selection Guidelinesmentioning

confidence: 99%

Smart blending technology enabled by chaotic advection

et al. 2006

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ABSTRACT:Polymer blending has been typically regarded as a mixing process rather than a structuring process so polymer blends and composites are not necessarily optimized with regard to structure, properties, and composition. In this article, a new smart blending technology is described whereby melt components and solid additives are more controllably organized into micrometer-scale and sub-micrometer-scale shapes and arrangements to improve properties or impart functionality to extruded plastics. Chaotic advection is an enabling recent subfield of fluid mechanics for smart blending. It provides a method to controllably stretch and fold melt domains and evolve a multilayered structure leading to derivative morphologies, or indirectly manipulate solid additives. Recent advances in fluid mechanics have thereby been implemented to reconsider how blending is done. A variety of structured plastic materials are producible with a single smart blending device with no device alterations. Several examples and their improved physical properties are shown or discussed.

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“…The sine waveform produced more uniform droplet-size distribution (DSD) than the square and steady waveforms. 11 Different degrees of chaotic mixing were produced by changing the value of angular displacement per period (), between /2 and 8; is defined as Figure 6. Poincaré maps generated from particle trajectories in a periodic box.…”

Section: Chaotic Mixingmentioning

confidence: 99%

“…It has been recently demonstrated that chaotic flows provide excellent means for producing fine scale dispersed phase morphology in the blending of immiscible polymers. [11][12][13][14][15][16] In these studies, repeated alignment, stretching and folding of the fluidic interfaces produce self-similar mixing structures which acted as templates for a series of morphological transitions similar to what was observed in nonchaotic flows, [2][3][4][5][6] for example, lamella, fibrils, droplets and their combinations, but with much smaller length scales. The chaotic fluid element trajectories also enhance transport of mass and energy [17][18][19][20][21][22] and improve distributive mixing in single screw extruders.…”

Section: Introductionmentioning

confidence: 99%