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Kinetic and mechanistic features of nitroxide mediated (co)polymerization
(Stellenbosch : University of Stellenbosch, 2011-03)
Please refer to full text to view abstract.
Development of permanently antimicrobial coatings
(Stellenbosch : Stellenbosch University, 2011-12)
ENGLISH ABSTRACT: Water-borne coatings often contain multiple additives including pigments, dispersing agents,
rheology modifiers, UV stabilizers and biocides. Due to their low molar mass and endocrinedisrupting
properties, ...
Impact of molecular structure on water vapour sorption properties in nanostructured polymeric films
(Stellenbosch : Stellenbosch University, 2011-12)
ENGLISH ABSTRACT: In this study, the use of surfactants, plate-like clays, organophilic molecules and side-chain
crystallinity was investigated for their impact on the transport mechanisms of water vapour
through polymer ...
Electrospun antimicrobial and antibiofouling nanofibres
(Stellenbosch : Stellenbosch University, 2011-12)
ENGLISH ABSTRACT: The main objective of this study was to develop electrospun nanofibres with both antimicrobial and antibiofouling properties for possible application in water filtration. To do this, two routes were ...
Preparation of polymer-clay nanocomposites via dispersion polymerization using tailor-made polymeric surface modifiers
(Stellenbosch : Stellenbosch University, 2011-12)
ENGLISH ABSTRACT: Fully exfoliated polystyrene-clay nanocomposites were prepared via free radical polymerization in dispersion polymerization, in a mixture of ethanol and water. Sodium montomorillonite clay (MMT) was ...
Single bubble-electrospinning of polyvinyl alcohol and polyacrylonitrile
(Stellenbosch : Stellenbosch University, 2011-12)
ENGLISH ABSTRACT: Needle-electrospinning is an uncomplicated and highly versatile nanofiber (fiber diameter of 50 to 500 nm) production technique. Nevertheless the process can only produce 0.01 to 1.0 g/h/m2 of nanofibers, ...
Multidimensional fractionation of wood-based tannins
(Stellenbosch : University of Stellenbosch, 2011-03)
ENGLISH ABSTRACT: High molar mass tannin extracts are complex mixtures which are distributed in both molar mass and chemical composition. Condensed tannins from quebracho and mimosa and hydrolysable tannins of tara, chestnut ...
Molecular weight effects on crystallization of polypropylene
(Stellenbosch : University of Stellenbosch, 2011-03)
ENGLISH ABSTRACT: The crystallization of polyolefins is an important parameter in determining the properties of
such materials. The crystallization phenomenon generally depends on the molecular
symmetry (tacticity) and ...
Towards light switchable surfaces
(Stellenbosch : Stellenbosch University, 2011-12)
ENGLISH ABSTRACT: Polymeric nanofibrous membranes that act as surfaces offer two compelling properties; they have
extremely large surface areas that can be modified and they can offer multiple reactive sites depending
on ...
Free volume properties of semi-crystalline polymers
(Stellenbosch : University of Stellenbosch, 2011-03)
ENGLISH ABSTRACT: Positron annihilation lifetime spectroscopy (PALS) is well established as a novel method
currently available for the study of polymers at a molecular level because of its sensitivity
to the microstructural ...