The surface properties of novel 2-D nanoemulsions, composed of mixtures of the perquaternized diblock poly(styrene$ sb{260}$-block-4-vinylpyridinium$ sb{240}$) and homopolystyrene spread at the air-water interface, were thoroughly studied using the Langmuir film balance and microscopy techniques (transmission electron microscopy and atomic force microscopy). The effects of both the molecular weight of homopolystyrene and the amount added were explored. It was found that the surface morphology could be manipulated in a predictable way by the addition of homopolystyrene. The surface films of the diblock families poly(styrene-block-sodium acrylate) and poly(styrene-block-sodium methacrylate) spread at the air-water interface were also investigated. The morphologies of their surface aggregates, i.e., jellyfish micelle, ribbon, and plane, were studied as parameters such as temperature and sub-phase electrolyte concentration were varied. A novel morphology, the 2-D nanofoam, was also investigated. The cellular walls of the 2-D nanofoams are found to consist of the polystyrene blocks of thickness on the order of the radius of gyration of the polystyrene blocks. Quantitative analysis of these cellular networks provides results similar to macroscopic 2-D surfactant foams indicating that the same forces are operative in both systems.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.69642 |
| Date | January 1993 |
| Creators | Meszaros, Caroline Michele |
| Contributors | Eisenberg, A. (advisor), Lennox, R. B. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Chemistry.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001357905, proquestno: AAIMM91733, Theses scanned by UMI/ProQuest. |
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