Thesis (M.Sc.)--Stellenbosch University, 2000. / ENGLISH ABSTRACT: This thesis is a written record of an investigation into the self-assembly of organic
monomers in amphiphilic solutions.
The polymerizable surfactant sodium 10-undecenoate was used alone and with
different concentrations of styrene and methyl methacrylate monomers and phenyl
acetophenone initiator to investigate single particle formation from a simple
amphiphilic self-assembly. Reactions were carried out under either ultra-violet light or
gamma irradiation.
It was shown that copolymerization between the surfactant and the monomers did not
occur to any significant extent. This meant that inclusion of easily modifiable
carboxyl functionalities in the polymer by incorporation of the carboxylate surfactant
could not be quantified.
Star-like particles were found. The shape of the particles formed, was the result of
surfactant self-assembly to create self-assembled particles rather than templating of
polymeric material. Polymerization of the unsaturated surfactant particles occurred to
low conversions only.
Analyses of formed particles were carried out using scanning electron microscopy,
transmission electron microscopy, atomic force microscopy, field emission scanning
electron microscopy and light microscopy for structure observation.
The techniques of energy dispersive analysis by x-rays, particle SIze analysis,
differential scanning calorimetry, thermogravimetric analysis, Fourier transform infrared
analysis, nuclear magnetic resonance, small angle x-ray scattering and inductively
coupled plasma (for counter-ion analysis) were used for the gathering of physical
data. / AFRIKAANSE OPSOMMING: Hierdie studie is 'n geskrewe rekord van 'n ondersoek van die self-aneensetting van
organiese monomere in amfifiliese oplossings.
In die ondersoek is die polimeeriseerbare seep natrium 10-undekenoaat alleen en saam
met verskillende konsentrasies van monomere en feniel asetofenoon gebruik om
enkelpartikel formasie vanaf 'n eenvoudige amfifiliese templaat te ondersoek.
Reaksies is uitgevoer onder of ultra-violet lig, of gamma bestraling.
Dit is bewys dat kopolimerisasie tussen die seep en die monomere me III emge
merkwaardige hoeveelhede plaasgevind het nie. Dit beteken dat insluiting van maklik
veranderbare karboksiel funksionele groepe in die polimeer deur middel van insluiting
van die karboksilaat seep nie meetbaar was nie.
Ster-vormige partikels is gevind. Dit is getoon dat die vorm van die partikels wat in
die vroeëre werk verkry is, die resultaat van seep self-aaneensetting, eerder as
templatering van polimeriese materiaal is. Polimerisasie van die seep partikels het net
tot lae vlak van omskakeling plaasgevind.
Analise van die gevormde partikels is uitgevoer deur middel van skandeer elektron
mikroskopie; transmissie elektronmikroskopie; atomiese kragmikroskopie;
veldemissie skandeer elektron mieroskopie en ligmikroskopie vir struktuur bepalings.
Die tegnieke van energie dispersie analiese deur middel van x-strale; deeltjie grootte
analise; differensiaal skandeer kalorimetrie; termogravimetriese analise; Fourier
transformasie infra rooi analiese; kern magnetiese resonansie; klein hoek x-straal
diffraksie en induktief-gekoppelde plasma (vir teenioon analise) is gebruik om fisiese
data te versamel.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/51610 |
| Date | 04 1900 |
| Creators | McLeary, James Breton |
| Contributors | Sanderson, R. D., Stellenbosch University. Faculty of Science. Dept. of Chemistry and Polymer Science. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | English |
| Type | Thesis |
| Format | 141 p. : ill. |
| Rights | Stellenbosch University |
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