The present study is devoted to the morphologies and corona compositions in aggregates of mixtures of PS-b-PAA and PS-b-P4VP block copolymers as influenced by controllable assembly parameters, such as block length, pH, solvent, water content and the molar ratio of PAA/P4VP. Morphologies and surface properties of the aggregates were investigated by transmission electron microscopy and electrophoretic mobility, respectively. According to the results, the general hypothesis that the external corona is composed of long chains, while short chains form the inner corona of the vesicles, is valid only in mixtures without additives (no acid or base). In the presence of acid or base the environment during aggregate formation influences the system. Besides the numerical block length, pH and solvent composition, and therefore solubility, determines the morphology and the coil dimension; the numerically longer chains can be made to contract and to go to the inside, while the numerically shorter chains go to the outside.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.98513 |
| Date | January 2005 |
| Creators | Vyhnalkova, Renata. |
| 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 | © Renata Vyhnalkova, 2005 |
| Relation | alephsysno: 002494683, proquestno: AAIMR24820, Theses scanned by UMI/ProQuest. |
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