| dc.contributor.author | Rodenhiser, Andrew Paul. | en_US |
| dc.date.accessioned | 2014-10-21T12:33:57Z | |
| dc.date.available | 1999 | |
| dc.date.issued | 1999 | en_US |
| dc.identifier.other | AAINQ49287 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/55669 | |
| dc.description | Fluorescence probing and size exclusion chromatographic (SEC) techniques were applied to study complexes formed in several polymer-surfactant systems. Fluorescence probing techniques measure the size, micropolarity and microviscosity of the micellar aggregates bound to the polymer. The use of the time resolved fluorescence quenching technique required writing software for data analysis. Size exclusion chromatography was adapted to measure the size of the overall polymer-surfactant complex. A multiangle laser light scattering detector and a refractometer allowed molecular weight determination without reference to elution volume. | en_US |
| dc.description | The methods were tested on mixtures of sodium dodecyl sulfate (SDS) with poly(ethylene oxide) (PEO) and poly(vinyl pyrrolidone) (PVP). Micelle aggregation numbers were lower in the bound micelles than in free micelles. The PVP-SDS micelles were more rigid and more polar than PEO-SDS micelles. The SEC study revealed three types of SDS binding as a function of PEO degree of polymerization (DP): no interaction for the smallest glycols, partitioning in and out of micelles for the intermediate oligomers (DP 5 to ≈ 20), and binding of one or more micelles to the longer polymer chains. | en_US |
| dc.description | Micelles of dodecyltrimethylammonium. bromide bound to poly(acrylamide- co-sodium acrylate) polyelectrolytes were similar in size to free micelles, increasing slightly with degree of binding and polymer charge density. The use of cationic quenchers in these systems perturbed the binding, as predicted by ideal mixing theory, and should be avoided. | en_US |
| dc.description | Formation of interpolymer complexes in hydrophobically modified polyacrylamide-surfactant mixtures was enhanced by shear in SEC. Fluorescence measurements suggest a stepwise growth and division of the micelles bound to the polymer hydrophobes, and a rigid micellar surface. | en_US |
| dc.description | Thesis (Ph.D.)--Dalhousie University (Canada), 1999. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Chemistry, Physical. | en_US |
| dc.title | Fluorescence probing and size exclusion chromatographic studies of polymer-surfactant interactions. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
