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 69 publications

(33 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…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

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

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

et al. 2005

View full text Add to dashboard Cite

“…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

View full text Add to dashboard Cite

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.

show abstract

“…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%