Department of Chemistry and Polymer Science
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Structure property relationships in bimodal HDPEs
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: By explicitly tailoring the microstructure of a polymer, it is possible to obtain more desirable properties for the intended product application, in addition to ensuring suitability for the required ... -
Long chain branching analysis of polyethylene using advanced fractionation methods
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: olyolefins (POs) have contributed immensely to the quality of life since their commercialization in the mid-1950s and they are modified continuously to suit new applications. PO homopolymer properties ... -
Structure-property relationship of bimodal high density polyethylene: Effect on rheology
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Bimodal polyethylene is a version of HDPE that is tailor-made to possess better processability and mechanical strength. Polymerisation is carried out in a low-pressure dual reactor system in the presence ... -
Attempted synthesis of a meta-metalated calix[4]arene
(Beilstein-Institut, 2019)ENGLISH ABSTRACT: An evidence for the formation of a rare meta-metalated inherently chiral calix[4]arene is described. Our strategy involved using a mesoionic carbene to direct C–H activation, but proved to form an ... -
Advancing membrane biology with poly(styrene-co-maleic acid)-based native nanodiscs
(Elsevier, 2019)ENGLISH ABSTRACT: The elucidation of the structures and interactions of proteins and lipids in intact biological membranes remains largely uncharted territory. However, this information is crucial for understanding how ... -
Degradation of proteins and starch by combined immobilization of protease, α-amylase and β-galactosidase on a single electrospun nanofibrous membrane
(MDPI, 2019-01-31)Two commercially available enzymes, Dextrozyme (α-amylase) and Esperase (protease), were covalently immobilized on non-woven electrospun poly(styrene-co-maleic anhydride) nanofiber mats with partial retention of their ... -
Design and study of bioorganometallic artemisinins as antimicrobials
(Stellenbosch : Stellenbosch University, 2021-12)ENGLISH ABSTRACT: Due to the rise in artemisinin resistant Plasmodium falciparum strains, the main focus of this study was to maintain and increase the efficacy of artemisinin to optimise the production of reactive ... -
Investigating the solid-state dynamics of 1D coordination polymers
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: The aims of this study were twofold: (i) to produce a series of 1D materials exhibiting novel solid-state packing, and (ii), to study these materials with a view to gaining insight into their structure-property ... -
Catalysis with cobalt porphyrins: solution and mechanochemistry
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: In this study, cobalt metalloporphyrins (Co-porphyrins) were investigated for their potential to catalyze the oxidation of benzyl alcohol in solution, and also by mechanochemistry as a non-classical ... -
Synthesis of 2,2-dipyridylamine organometallic complexes for antiplasmodial application
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Six iridium, rhodium and ruthenium half-sandwich organometallic complexes (C1-C6) of the ligand 2,2- dipyridilamine with either a chlorido and iodido ancillary ligand were synthesized using a reported method ... -
Structure-property relationships in PVC-lubricant compounds
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: This thesis was constructed with the aim of developing and improving current methods for tracking lubricants during the single screw extrusion of unplasticized polyvinyl chloride (uPVC). First a set of ... -
4-Benzyloxylonchocarpin and muracatanes A-C from Ranunculus muricatus L. and their biological effects
(MDPI, 2020-11-17)ENGLISH ABSTRACT: Ranunculus muricatus L. is a spiny fruit buttercup that is used in various traditional medicinal systems. In the current investigation of R. muricatus, the new chalcone 4-benzyloxylonchocarpin (1), the ... -
Ternary hydrogel blends of water-soluble polymers: A fundamental study
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Poly(vinyl alcohol) (PVA) is a water-soluble polymer. The use of PVA in the preparation of hydrogels has been well reported. However, PVA is not inherently antimicrobial, thus if this polymer is to be ... -
Defect engineering of UiO-66 metal-organic framework (MOF) for improved hydrogen storage applications
(Stellenbosch : Stellenbosch University, 2021-03)ENGLISH ABSTRACT: Metal–organic frameworks (MOFs) as a relatively new class of porous crystalline materia ls have attracted much interest in many applications due to their high porosity, diverse structures, ... -
A calix[4]arene based boronic acid catalyst for amide bond formation : proof of principle study
(ARKAT USA, 2018-06-25)ENGLISH ABSTRACT: A calix[4]arene boronic acid was synthesized and tested for catalysis in amide formation. The results were positive and paved the way for future designs, even though protodeboronation was observed under ... -
Characterization of glycopolymers by asymmetric flow field-flow fractionation
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: An alternative route for studying the interactions between human serum albumin (HSA) and dendronized glycopolymers was implemented by applying a versatile asymmetric flow field-flow fractionation ... -
Residual pyrethroid content in wet and dry interior decorative coatings- an HPLC study
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: Mosquitoes knownto be malaria vectors continue to affect many regions in Africa.To mitigate the detrimental health effects arising from the cohabitation of such species with humans, pyrethroid-based ... -
Multidimensional fractionation of complex polymers by comprehensive online-coupled thermal field-flow fractionation and size exclusion chromatography.
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: The comprehensive characterization of complex polymeric materials remains a primary objective in research and industry. It is important to understand the molecular heterogeneity of complex ... -
Selective synthesis of multicomponent crystals using mechanochemistry and sublimation
(Stellenbosch : Stellenbosch University, 2020-12)ENGLISH ABSTRACT: The aim of this thesis is to demonstrate how careful control of the crystallisation technique used can lead to selective multicomponent crystal formation. Multicomponent materials are often crystallised ... -
The development and refinement of a questionnaire on the investigation of students' experience of first-year chemistry practicals
(University of KwaZulu-Natal, 2013)This article reports on the development and refinement of a questionnaire for first-year Chemistry students. Three subscales were probed, namely affective attitudes, perceptions towards tutor effectiveness and outcomes achieved.
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