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Now showing items 1-9 of 9
Synthesis and characterization of polystyrene-graphite nanocomposites via surface RAFT-mediated miniemulsion polymerization
Graphite oxide (GO) was prepared and immobilized with dodecyl isobutyric acid trithiocarbonate (DIBTC) reversible addition-fragmentation chain transfer (RAFT) agent. The hydroxyl groups of GO were attached to the DIBTC ...
Coaxial electrospinning of miscible PLLA-core and PDLLA-shell solutions and indirect visualisation of the core-shell fibres obtained
Core-shell fibres of semi-crystalline poly(L-lactic acid) (PLLA) (core) and amorphous poly(D,L-lactic acid) (PDLLA) (shell) were produced through the coaxial electrospinning of two miscible solutions. Due to the poor ...
Synthesis and characterization of polystyrene-graphite nanocomposites via surface raft-mediated polymerization
The synthesis of polystyrene/GO (PS-GO) nanocomposites using the reversible addition-fragmentation chain transfer (RAFT) mediated polymerization method is described. The GO was synthesized and immobilized with a RAFT agent ...
Poly(acrylonitrile-co-methyl acrylate) copolymers: Correlation between copolymer composition, morphology and positron annihilation lifetime parameters
A series of poly(acrylonitrile-co-methyl acrylate) copolymers of differing copolymer compositions are synthesized through free radical emulsion copolymerisation of methyl acrylate (MA) and acrylonitrile (AN) and by variation ...
Effect of vinyl pivalate/vinyl acetate comonomer composition on the self-assembled morphology of poly(vinyl alcohol) prepared by in situ fibrillation: Preparation of PVA with a spherical morphology
The photoinitiated copolymerization of vinyl pivalate (VPi) and vinyl acetate (VAc) was carried out in bulk. Varying monomer feed ratios of VPi/VAc (mol %/mol %) of 100/0, 90/10, 60/40, 50/50, and 30/70 were used. Polyvinyl ...
Reversibly thermochromic micro-fibres by coaxial electrospinning
A 'solvent facilitated' coaxial electrospinning process was used to produce reversible narrow temperature gap thermochromic, core-shell fibres. A thermochromic composite composed of crystal violet lactone (the leuco dye), ...
Formation and structural evolution of biphenyl polyamide thin film on hollow fiber membrane during interfacial polymerization
A novel reverse osmosis hollow fiber membrane was prepared by interfacial polymerization from 3,3',5,5'-biphenyl tetraacyl chloride and m-phenylenediamine on a polysulfone hollow fiber membrane. The structural evolution ...
Flux flow and cleaning enhancement in a spiral membrane element, using continuous infrasonic backpulsing
The effect of backpulsing, into the permeate space of a 2.5 inch spiral wrap membrane, on the prevention of fouling (flux enhancement) was investigated experimentally. These experiments were performed using a 500 mg·l-1 ...