Influence of solvent and molecular weight in wrinkle formation in spin-cast polystyrene thin films
The surface morphology of polystyrene thin films formed from various molecular weight polystyrene and solvent conditions is studied. When spin-cast from tetrahydrofuran (THF) wrinkles are formed at the extremities that have periodicity with wavelengths in the μm range and amplitudes in the nm range...
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| Format: | Article |
| Language: | English |
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AIMS Press
2020-03-01
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| Series: | AIMS Materials Science |
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| Online Access: | https://www.aimspress.com/article/10.3934/matersci.2020.1.60/fulltext.html |
| _version_ | 1819154021617762304 |
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| author | Chunyi Tang Matthew Mullen William B. Euler |
| author_facet | Chunyi Tang Matthew Mullen William B. Euler |
| author_sort | Chunyi Tang |
| collection | DOAJ |
| description | The surface morphology of polystyrene thin films formed from various molecular weight polystyrene and solvent conditions is studied. When spin-cast from tetrahydrofuran (THF) wrinkles are formed at the extremities that have periodicity with wavelengths in the μm range and amplitudes in the nm range but varies with molecular weight. A mixed solvent system consisting of THF and dimethylformamide (DMF) leads to periodic structures only with THF-rich compositions. THF and DMF have similar properties relevant to spin-casting: density, surface tension, molecular weight, and viscosity but different boiling points and room temperature vapor pressures, demonstrating that formation periodicity requires a volatile solvent. The formation of the surface structures is attributed to the Marangoni effect and the film thicknesses and wave parameters are shown to be consistent with literature models. |
| first_indexed | 2024-12-22T15:14:27Z |
| format | Article |
| id | doaj.art-12edeb4665d8407f84a8cadc4384eb0c |
| institution | Directory Open Access Journal |
| issn | 2372-0484 |
| language | English |
| last_indexed | 2024-12-22T15:14:27Z |
| publishDate | 2020-03-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Materials Science |
| spelling | doaj.art-12edeb4665d8407f84a8cadc4384eb0c2022-12-21T18:21:47ZengAIMS PressAIMS Materials Science2372-04842020-03-0171607410.3934/matersci.2020.1.60Influence of solvent and molecular weight in wrinkle formation in spin-cast polystyrene thin filmsChunyi Tang0Matthew Mullen1William B. Euler21 College of Biological and Chemical Engineering, Guangxi University of Science and Technology, No. 268 Donghuan Road, Chengzhong District, Liuzou, Guangxi, 545006, P. R. China 2 Key Laboratory for Processing of Sugar Resources of Guangxi Higher Education Institutes, Guangxi University of Science and Technology, Liuzhou 545006, P. R. China3 Department of Chemistry, 140 Flagg Road, University of Rhode Island, Kingston, RI, 02881, USA3 Department of Chemistry, 140 Flagg Road, University of Rhode Island, Kingston, RI, 02881, USAThe surface morphology of polystyrene thin films formed from various molecular weight polystyrene and solvent conditions is studied. When spin-cast from tetrahydrofuran (THF) wrinkles are formed at the extremities that have periodicity with wavelengths in the μm range and amplitudes in the nm range but varies with molecular weight. A mixed solvent system consisting of THF and dimethylformamide (DMF) leads to periodic structures only with THF-rich compositions. THF and DMF have similar properties relevant to spin-casting: density, surface tension, molecular weight, and viscosity but different boiling points and room temperature vapor pressures, demonstrating that formation periodicity requires a volatile solvent. The formation of the surface structures is attributed to the Marangoni effect and the film thicknesses and wave parameters are shown to be consistent with literature models.https://www.aimspress.com/article/10.3934/matersci.2020.1.60/fulltext.htmlmorphologypolymersolvent castingwrinkle formationspin-coating |
| spellingShingle | Chunyi Tang Matthew Mullen William B. Euler Influence of solvent and molecular weight in wrinkle formation in spin-cast polystyrene thin films AIMS Materials Science morphology polymer solvent casting wrinkle formation spin-coating |
| title | Influence of solvent and molecular weight in wrinkle formation in spin-cast polystyrene thin films |
| title_full | Influence of solvent and molecular weight in wrinkle formation in spin-cast polystyrene thin films |
| title_fullStr | Influence of solvent and molecular weight in wrinkle formation in spin-cast polystyrene thin films |
| title_full_unstemmed | Influence of solvent and molecular weight in wrinkle formation in spin-cast polystyrene thin films |
| title_short | Influence of solvent and molecular weight in wrinkle formation in spin-cast polystyrene thin films |
| title_sort | influence of solvent and molecular weight in wrinkle formation in spin cast polystyrene thin films |
| topic | morphology polymer solvent casting wrinkle formation spin-coating |
| url | https://www.aimspress.com/article/10.3934/matersci.2020.1.60/fulltext.html |
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