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    Now showing items 1-20 of 65

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        AB diblock copolymers via RAFT-mediated miniemulsion polymerization 

        Bailly, Nathalie (Stellenbosch : Stellenbosch University, 2008-12)
        The Reversible addition fragmentation chain transfer (RAFT) technique is a robust and versatile technique that enables the synthesis of polymers of controlled molecular weight and polydispersity. The application of the ...
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        Amphiphilic electrospun fibres of poly(methacrylic acid)-graft-poly(dimethylsiloxane) copolymers as a means to controlling electrospun fibre morphology and obtaining nanofibre hydrogels 

        Meltz, Freda-Jean (Stellenbosch : Stellenbosch University, 2014-04)
        ENGLISH ABSTRACT: Novel poly(methacrylic acid)-graft-poly(dimethylsiloxane) copolymers were synthesised by conventional free radical reactions using a poly(dimethylsiloxane) macromonomer. The polymers were electrospun ...
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        Asymmetric flow field flow fractionation (AF4) of polymers with focus on polybutadienes and polyrotaxanes 

        Makan, Ashwell Craig (Stellenbosch : Stellenbosch University, 2012-03)
        ENGLISH ABSTRACT: Over the past two decades, field flow fractionation (FFF), as a polymer characterization technique, has become cutting edge technology. The demand for molar mass and size characterisation of complex polymer ...
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        Atom transfer radical polymerisation of unusual monomers 

        Staisch, Ingrid (Stellenbosch : Stellenbosch University, 2003-12)
        ENGLISH ABSTRACT: Controlled free radical polymerisation techniques offer several practical and theoretical advantages compared to many other polymerisation techniques. Living polymerisation techniques such as anionic ...
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        Blends with low-density polyethylene (LDPE) and plastomers 

        Rabie, Allan John (Stellenbosch : Stellenbosch University, 2004-12)
        ENGLISH ABSTRACT: This study describes the design, building and optimization of a fully functional preparative TREF (Prep-TREF) apparatus. This apparatus allows for the fractionation of semicrystalline polyolefins ...
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        Co-crystallization in polyolefin blends studied by various crystallization analysis techniques 

        Sweed, Muhamed (Stellenbosch : University of Stellenbosch, 2006-03)
        Co-crystallization is the phenomenon by which chains of different crystallizabilities crystallize at the same temperature. Co-crystallization is frequently observed in the blends of different types of polyethylene. It ...
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        A comparative analysis of the chemical composition of linear low density polyethylene polymers synthesised with 1- hexene comonomer under different catalytic conditions 

        Naidoo, Preloshni (Stellenbosch : Stellenbosch University, 2013-03)
        ENGLISH ABSTRACT: A comparative study of the chemical composition of linear low density polyethylene polymers, synthesised with 1 - hexene as comonomer was conducted. Catalyst trials were conducted on the linear low density ...
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        Controlled free radical polymerization in miniemulsion using Reversible Addition-Fragmentation Chain Transfer (RAFT) 

        Vosloo, Johannes Jacobus (Stellenbosch : Stellenbosch University, 2001-12)
        ENGLISH ABSTRACT: A novel approach to conducting controlled free radical polymerization in aqueous systems using Reversible Addition-Fragmentation Chain Transfer (RAFT) has been studied. When conducting RAFT in aqueous ...
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        The correlation of the molecular structure of polyolefins with environmental stress cracking resistance 

        Shebani, Anour Nasser (Stellenbosch : University of Stellenbosch, 2006-12)
        This study concerns the phenomenon of environmental stress cracking resistance (ESCR) in three impact polypropylene copolymers (IPPCs). The main purpose was to correlate the ESCR with their properties such as microstructure, ...
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        Degradation and recovery of polydimethylsiloxane (PDMS) based composites used as high voltage insulators 

        Abraham Berhane, Teclesenbet (Stellenbosch : Stellenbosch University, 2004-12)
        ENGLISH ABSTRACT: Polydimethylsiloxane (PDMS) compounds are utilized in outdoor high voltage insulation due to their low weight, vandalism resistance, better anti-contamination performance and their superior hydrophobic ...
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        Design, synthesis and characterization of novel raft agents 

        Bivigou Koumba, Achille Mayelle (Stellenbosch : University of Stellenbosch, 2005-12)
        This thesis begins with the description of the preparation of thirteen dithioesters (of the form Z- (C=S)-S-R) which were characterized via Fourier-transform infrared spectroscopy (FT-IR), nuclear magnetic resonance ...
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        The development of a novel technique for AFM thermal analysis of individual phases in polymer mixtures after separation and identification via LC-FTIR 

        De Goede, E. (Elana) (Stellenbosch : Stellenbosch University, 2004-03)
        ENGLISH ABSTRACT: In the ongomg search for better and faster ways to characterize complex polymer systems, it is often necessary to couple different analytical techniques in order to obtain information on more than one ...
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        Development of permanently antimicrobial coatings 

        Cloete, William Joseph (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, ...
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        The effect of iodo alkyl chain transfer agents on the seeded emulsion homo- and co-polimerisation of styrene and butyl acrylate 

        Beyers, Cornelis Petrus (Stellenbosch : Stellenbosch University, 1999)
        ENGLISH ABSTRACT: A free-radical polymerisation process, which has characteristics of a living polymerisation system, as it is capable of producing polymers of pre-determined molecular masses with a narrow molecular ...
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        The effect of molecular architecture on the properties of propylene impact copolymers 

        Basson, N. C. (Stellenbosch : University of Stellenbosch, 2010-03)
        ENGLISH ABSTRACT: Impact polypropylene copolymers (IPPC) are important commercial materials, but their morphology and molecular architecture are not yet fully understood. In this study the focus was on selectively removing ...
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        The effect of monosaccharide reducing sugars on the atom transfer radical polymerization of n-butyl methacrylate and methyl methacrylate 

        De Vries, Andrew Robert (Stellenbosch : Stellenbosch University, 2001-12)
        ENGLISH ABSTRACT: The effect of various organic reducing agents, in the. form of monosaccharide reducing sugars, on the rate of atom transfer radical polymerization (ATRP) of n-butyl methacrylate and methyl methacrylate ...
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        Emulsion polymerization of styrene in the presence of reversible addition-fragmentation chain transfer agents 

        Hodgson, Marcelle (Stellenbosch : Stellenbosch University, 2000-03)
        ENGLISH ABSTRACT: This work involves the study of the effects of Reversible Addition-Fragmentation Chain Transfer (RAFT) agents on the emulsion polymerization of styrene. The feasibility of RAFT as a method for obtaining ...
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        The fractionation and characterisation of propylene-ethylene random copolymers 

        Harding, Gareth (Stellenbosch : University of Stellenbosch, 2005-12)
        This study involves the fractionation and characterisation of three propyleneethylene random copolymers. The fractionation technique used in the study was temperature rising elution fractionation (TREF). The TREF fractions ...
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        Fun with polymers : development of interactive multimedia and practical polymer science programmes 

        De Kock, Jacobus Johannes (Stellenbosch : Stellenbosch University, 2002-03)
        ENGLISH ABSTRACT: Multimedia was the buzzword of the previous decade. Electronic learning is the buzzword of this decade. Both concepts changed, and are still changing the way educators present knowledge and information ...
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        Hydrophobic core/shell particles via miniemulsion polymerization 

        Etmimi, Hussein Mohamed (Stellenbosch : University of Stellenbosch, 2006-12)
        Hydrophobic core/shell latex particles were synthesized for use in barrier coatings using the miniemulsion polymerization process. Particles with liquid or with hard cores were successfully synthesized using miniemulsion ...

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