An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media
A study is presented of the oscillatory shear-ordering dynamics of viscoelastic photonic crystal media, using an optical shear cell. The hard-sphere/“sticky”-shell design of these polymeric composite particles produces athermal, quasi-solid rubbery media, with a characteristic viscoelastic ensemble...
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| Format: | Article |
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MDPI AG
2021-09-01
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| Online Access: | https://www.mdpi.com/1996-1944/14/18/5298 |
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| author | Chris E. Finlayson Giselle Rosetta Jeremy J. Baumberg |
| author_facet | Chris E. Finlayson Giselle Rosetta Jeremy J. Baumberg |
| author_sort | Chris E. Finlayson |
| collection | DOAJ |
| description | A study is presented of the oscillatory shear-ordering dynamics of viscoelastic photonic crystal media, using an optical shear cell. The hard-sphere/“sticky”-shell design of these polymeric composite particles produces athermal, quasi-solid rubbery media, with a characteristic viscoelastic ensemble response to applied shear. Monotonic crystallization processes, as directly measured by the photonic stopband transmission, are tracked as a function of strain amplitude, oscillation frequency, and temperature. A complementary generic spatio-temporal model is developed of crystallization due to shear-dependent interlayer viscosity, giving propagating crystalline fronts with increasing applied strain, and a gradual transition from interparticle disorder to order. The introduction of a competing shear-induced flow degradation process, dependent on the global shear rate, gives solutions with both amplitude and frequency dependence. The extracted crystallization timescales show parametric trends which are in good qualitative agreement with experimental observations. |
| first_indexed | 2024-03-10T07:29:10Z |
| format | Article |
| id | doaj.art-9c293a299df3426ca770c793b8723e15 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T07:29:10Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-9c293a299df3426ca770c793b8723e152023-11-22T14:01:55ZengMDPI AGMaterials1996-19442021-09-011418529810.3390/ma14185298An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal MediaChris E. Finlayson0Giselle Rosetta1Jeremy J. Baumberg2Department of Physics, Prifysgol Aberystwyth University, Aberystwyth SY23 3BZ, UKDepartment of Physics, Prifysgol Aberystwyth University, Aberystwyth SY23 3BZ, UKCavendish Laboratory, Department of Physics, University of Cambridge, Cambridge CB3 0HE, UKA study is presented of the oscillatory shear-ordering dynamics of viscoelastic photonic crystal media, using an optical shear cell. The hard-sphere/“sticky”-shell design of these polymeric composite particles produces athermal, quasi-solid rubbery media, with a characteristic viscoelastic ensemble response to applied shear. Monotonic crystallization processes, as directly measured by the photonic stopband transmission, are tracked as a function of strain amplitude, oscillation frequency, and temperature. A complementary generic spatio-temporal model is developed of crystallization due to shear-dependent interlayer viscosity, giving propagating crystalline fronts with increasing applied strain, and a gradual transition from interparticle disorder to order. The introduction of a competing shear-induced flow degradation process, dependent on the global shear rate, gives solutions with both amplitude and frequency dependence. The extracted crystallization timescales show parametric trends which are in good qualitative agreement with experimental observations.https://www.mdpi.com/1996-1944/14/18/5298polymersshear-induced crystallizationphotonic crystalscomposite materialsviscoelasticity |
| spellingShingle | Chris E. Finlayson Giselle Rosetta Jeremy J. Baumberg An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media Materials polymers shear-induced crystallization photonic crystals composite materials viscoelasticity |
| title | An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media |
| title_full | An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media |
| title_fullStr | An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media |
| title_full_unstemmed | An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media |
| title_short | An Experimental and Theoretical Determination of Oscillatory Shear-Induced Crystallization Processes in Viscoelastic Photonic Crystal Media |
| title_sort | experimental and theoretical determination of oscillatory shear induced crystallization processes in viscoelastic photonic crystal media |
| topic | polymers shear-induced crystallization photonic crystals composite materials viscoelasticity |
| url | https://www.mdpi.com/1996-1944/14/18/5298 |
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