Characterization of polystyrene-block-poly (acrylic acid) micelles
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2005.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2006
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| Online Access: | http://hdl.handle.net/1721.1/32846 |
| _version_ | 1826194327325376512 |
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| author | Kohen, Naomi (Naomi T.) |
| author2 | Darrell J. Irvine. |
| author_facet | Darrell J. Irvine. Kohen, Naomi (Naomi T.) |
| author_sort | Kohen, Naomi (Naomi T.) |
| collection | MIT |
| description | Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2005. |
| first_indexed | 2024-09-23T09:54:18Z |
| format | Thesis |
| id | mit-1721.1/32846 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T09:54:18Z |
| publishDate | 2006 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/328462019-04-10T18:42:42Z Characterization of polystyrene-block-poly (acrylic acid) micelles Kohen, Naomi (Naomi T.) Darrell J. Irvine. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Massachusetts Institute of Technology. Dept. of Materials Science and Engineering. Materials Science and Engineering. Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2005. Includes bibliographical references (leaf 38). Several parameters that affect the formation, size and spatial distribution of micelles of poly(styrene-block-acrylic acid) (PS-b-PAA) in organic solvents or assembled on solid substrates have been investigated. The micelles were characterized in the solvated state using Dynamic Light Scattering, and were imaged and characterized in the dry thin film state using Atomic Force Microscopy. Micelle size in solution followed scaling laws based on the ratio of the two block copolymer segments. Micelle size was not affected by the addition of PS homopolymer or salt, whereas micelle diameter did increase with the addition of PAA homopolymer both in solution and in the dry state on sold supports. Furthermore, micelles formed in toluene, but they did not form in tetrahydrofurane, chloroform or hexane. In terms of spatial distribution in the dry state, the only parameters which affected spacing, and therefore density, were annealing conditions and addition of PAA homopolymer. Annealing near or below the glass transition temperature for 16 hours increased the order of the films, as was demonstrated by Fast Fourier Transforms of their AFM images. Annealing for longer periods of time or at temperatures significantly above the glass transition temperature destroyed the micelles. by Naomi Kohen. S.B. 2006-05-15T20:34:17Z 2006-05-15T20:34:17Z 2005 2005 Thesis http://hdl.handle.net/1721.1/32846 61462509 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 38 leaves 1835300 bytes 1834853 bytes application/pdf application/pdf application/pdf Massachusetts Institute of Technology |
| spellingShingle | Materials Science and Engineering. Kohen, Naomi (Naomi T.) Characterization of polystyrene-block-poly (acrylic acid) micelles |
| title | Characterization of polystyrene-block-poly (acrylic acid) micelles |
| title_full | Characterization of polystyrene-block-poly (acrylic acid) micelles |
| title_fullStr | Characterization of polystyrene-block-poly (acrylic acid) micelles |
| title_full_unstemmed | Characterization of polystyrene-block-poly (acrylic acid) micelles |
| title_short | Characterization of polystyrene-block-poly (acrylic acid) micelles |
| title_sort | characterization of polystyrene block poly acrylic acid micelles |
| topic | Materials Science and Engineering. |
| url | http://hdl.handle.net/1721.1/32846 |
| work_keys_str_mv | AT kohennaominaomit characterizationofpolystyreneblockpolyacrylicacidmicelles |