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COMPUTATIONAL CLARIFICATIONS OF EXPERIMENTAL BLEND MORPHOLOGY TRANSITIONS IN IMMISCIBLE POLYMER MELTS ORGANIZED BY CHAOTIC ADVECTION
Authors:Abhijit S. Joshi   David A. Zumbrunnen
Affiliation:  a Laboratory for Advanced Plastic Materials and Technology, Department of Mechanical Engineering, Clemson University, Clemson, South Carolina, USA
Abstract:Chaotic advection has been used recently to organize immiscible polymer melts into thousands of alternating thin layers and controllably obtain from layer breakup a wide variety of useful derivative blend morphologies. Experiments suggested that morphology changes in the multiple layers occur progressively, volumetrically, and interactively via gradual layer refinement and the formation and growth of holes (i.e., ruptures). To theoretically evaluate the experimental findings and also clarify morphology development in multilayer melts, interactive hole growth in multiple layers and associated morphology transitions have been investigated for experimentally observed random and ordered-hole arrangements using the lattice Boltzmann method (LBM). Results also provide a three-dimensional generalization to multiple layers of prior studies focused on hole growth in thin film coatings.
Keywords:Chaotic advection  Coatings  Lattice Boltzmann method  Polymer blends
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