Thickett, S. C., Gaborieau, M., Gilbert, R. G.
Polymeric (steric and electrosteric) stabilizers, based on water-soluble polymers such as poly(acrylic acid) and poly(ethylene oxide), are widely used to make surface coatings by emulsion...
Toward a more general solution to the band-broadening problem in size separation of polymers (2007)
Konkolewicz, D., Taylor, J. W., Castignolles, P., Gray-Weale, A., Gilbert, R. G.
The molecular weight distributions (MWDs) and hydrodynamic volume distributions of polymers can reveal considerable mechanistic information on the polymerization process, and have significant effects...
Randomly hyperbranched polymers (2007)
Konkolewicz, D., Gilbert, R. G., Gray-Weale, A.
We describe a model for the structures of randomly hyperbranched polymers in solution, and find a logarithmic growth of radius with polymer mass. We include segmental overcrowding, which puts an...
Grafting of oligosaccharides onto synthetic polymer colloids (2007)
Mange, S., Dever, C., De Bruyn, H., Gaborieau, M., Castignolles, P., Gilbert, R. G.
A new method to form colloidally stable oligosaccharide-grafted synthetic polymer particles has been developed. The oligosaccharides, of weight-average degree of polymerization similar to 38, were...
Vosloo, J. J., Nicholson, T. M., Sanderson, R. D., Gilbert, R. G.
A range of comb polymers of poly(n-butyl methacrylate), where the degree of polymerization (DP) of both the backbone and branches was controlled using RAFT-mediated free-radical polymerization, was...
Starch-graft-(synthetic copolymer) latexes initiated with Ce4+ and stabilized by amylopectin (2007)
De Bruyn, H., Sprong, E., Gaborieau, M., Roper, J. A., Gilbert, R. G.
Ratinac, K. R., Gilbert, R. G., Ye, L., Jones, A. S., Ringer, S. P.
A variety of nanocomposites were synthesised by bulk polymerisation of methyl methacrylate (MMA), and also by extrusion of poly(methyl methacrylate) (PMMA). These were characterised by wide-angle...
The dissociation rate coefficient of persulfate in emulsion polymerization systems (2006)
Van Berkel, K. Y., Russell, G. T., Gilbert, R. G.
The effects of various components in an emulsion polymerization system on the dissociation rate coefficient of persulfate at 50 degrees C are examined using iodometry. Styrene monomer is found to...
Controlled radical polymerization in aqueous dispersed media (2006)
Save, M., Guillaneuf, Y., Gilbert, R. G.
Controlled radical polymerization (CRP), sometimes also termed 'living' radical polymerization, offers the potential to create a wide range of polymer architectures, and its implementation in aqueous...
Mechanism of radical entry in electrosterically stabilized emulsion polymerization systems (2006)
Thickett, S. C., Gilbert, R. G.
The kinetics and mechanism for the process of radicals entering latex particles from the aqueous phase ("radical entry") in electrosterically stabilized emulsion polymerization particles were...
Starch-graft-copolymer latexes initiated and stabilized by ozonolyzed amylopectin (2006)
De Bruyn, H., Sprong, E., Gaborieau, M., David, G., Roper, J. A., Gilbert, R. G.
A method is presented for synthesizing surfactant-free latexes comprising a starch-graft-vinyl polymer, (1) starting with a suspension of the highly branched starch amylopectin, either native or...
Synthesis of anisotropic nanoparticles by seeded emulsion polymerization (2006)
Mock, E. B., De Bruyn, H., Hawkett, B. S., Gilbert, R. G., Zukoski, C. F.
Anisotropic polystyrene nanoparticles of diameters below 0.5 mu m were prepared by coating the surface of crosslinked polystyrene latex particles with a thin hydrophilic polymer layer prior to...
Structure-property and structure-function relations of leafhopper (Kahaono montana) silk (2006)
Chang, J. C., Gurr, G. M., Fletcher, M. J., Gilbert, R. G.
Kahaono montana Evans (Insecta: Hemiptera: Cicadellidae), an endemic Australian leafhopper, is unique among the insect order Hemiptera in producing a silk. In this study, the secondary structure of...
Improved methods for the structural analysis of the amylose-rich fraction from rice flour (2006)
Ward, R. M., Gao, Q. Y., De Bruyn, H., Gilbert, R. G., Fitzgerald, M. A.
Cooking and sensory properties of rice are largely determined by the amylose content and structure. For relationships between functional and structural properties, a more accurate method to determine...
Fluorescence recovery after photobleaching as a probe of diffusion in starch systems (2006)
Perry, P. A., Fitzgerald, M. A., Gilbert, R. G.
The diffusion coefficients of dextran probes of various molecular weights in starch solutions over a wide concentration range were carried out using fluorescent recovery after photobleaching (FRAP),...
High-resolution separation of oligo(acrylic acid) by capillary zone electrophoresis (2006)
Castignolles, P., Gaborieau, M., Hilder, E. F., Sprong, E., Ferguson, C. J., Gilbert, R. G.
Oligo(acrylic acid)s, produced by RAFT polymerization, have been separated and analyzed for the first time by capillary zone electrophoresis. The resolution obtained by capillary electrophoresis in...
Rate optimization in controlled radical emulsion polymerization using RAFT (2006)
Prescott, S. W., Ballard, M. J., Rizzardo, E., Gilbert, R. G.
Means of improving rates in RAFT-mediated radical emulsion polymerizations are developed, by setting out strategies to minimize the inhibition and retardation that always are present in these...
Koh, A. Y. C., Mange, S., Bothe, M., Leyrer, R. J., Gilbert, R. G.
The effects of methacrylic acid (MAA) on the physical properties of polymer made by emulsion copolymerization of butyl acrylate (BA) and MAA were examined. Emulsion polymerizations were performed...
Molecular watchmaking: ab initio Emulsion polymerization by RAFT-controlled self-assembly (2006)
Sprong, E., Leswin, J. S. K., Lamb, D. J., Ferguson, C. J., Hawkett, B. S., Pham, B. T. T., ...
Controlled radical polymerization using RAFT has the potential to make polymers with virtually any desired molecular architecture. For this to be implemented on an industrial scale, it must be...
Oliveira, P. C., Guimaraes, A., Cavaille, J. Y., Chazeau, L., Gilbert, R. G., Santos, A. M.
The grafting efficiency of dimethylaminoethylmethacrylate (DMAEMA) on to natural rubber (NR) has been studied. Grafting was by 'topology-controlled' emulsion polymerization, whereby polymerization is...
Effect of surfactants used for binder synthesis on the properties of latex paints (2005)
Butler, L. N., Fellows, C. M., Gilbert, R. G.
Surfactants are commonly used during emulsion polymerization to produce stable dispersions of polymer particles for applications such as paints, adhesives and other coating applications. Surfactants...
Pulsed laser polymerization study of the propagation kinetics of acrylamide in water (2005)
Seabrook, S. A., Tonge, M. P., Gilbert, R. G.
Pulsed laser polymerization was used in conjunction with aqueous-phase size exclusion chromatography with multi-angle laser light scattering detection to determine the propagation rate coefficient...
Modification of natural rubber by grafting with hydrophilic vinyl monomers (2005)
Kangwansupamonkon, W., Gilbert, R. G., Kiatkamjornwong, S.
The grafting of two hydrophilic vinyl monomers, dimethylaminoethyl acrylate (DMAEA) and dimethylaminoethyl methacrylate (DMAEMA), onto natural rubber latex was carried out by emulsion polymerization...
Van Berkel, K. Y., Russell, G. T., Gilbert, R. G.
The chain-stopping and radical-loss events in the seeded emulsion polymerization of methyl methacrylate are determined using information from the complete molecular weight distributions (MWDs) and...
Termination rate coefficients for acrylamide in the aqueous phase at low conversion (2005)
Seabrook, S. A., Pascal, P., Tonge, M. P., Gilbert, R. G.
The kinetics of acrylamide (AAm) free radical polymerization at low conversion of monomer to polymer in the aqueous phase was investigated at 50 degrees C using gamma-radiolysis relaxation, which is...
Elgebrandt, R. C., Romagnoli, J. A., Fletcher, D. F., Gomes, V. G., Gilbert, R. G.
Shear-dependent coagulation is a costly problem for the latex manufacturing industry, due to product degradation and reactor downtime. In this study, a method for calculating the shear-dependent...
A method for preparing low-allergen natural rubber latex (2005)
Vivaygananthan, K., Lai, P. F., Gan, S. N., Fellows, C. M., Gilbert, R. G.
The free radical polymerization of dimethylaminoethyl methacrylate (DMAEMA) on the surface of particles in natural rubber latex (NRL) was carried out using an iron(ii)/tetraethylenepentamine (TEPA)...
Lamb, D. J., Fellows, C. M., Morrison, B. R., Gilbert, R. G.
Protocols were examined for the measurement of rates and enthalpies of polymerization (DeltaH(p)) using reaction calorimetry. DeltaH(p) was determined to be 70.2 kJ mol(-1) for a series of seeded...
Prescott, S. W., Ballard, M. J., Gilbert, R. G.
A method is presented by which the time-dependent average termination rate coefficient in an emulsion polymerization may be calculated as an appropriate average of the chain-length-dependent...
Catalytic insertion polymerization of norbornene in miniemulsion (2005)
The catalytic insertion polymerization of norbornene (NB) was implemented under miniemulsion conditions. Using sodium dodecyl sulfate (SDS) as surfactant and hexadecane as hydrophobe, the insertion...
Radical entry mechanisms in redox-initiated emulsion polymerizations (2005)
Lamb, D. J., Fellows, C. A., Gilbert, R. G.
The mechanisms and kinetics of radical entry in emulsion polymerizations utilizing redox initiation are investigated using polymerization rate data obtained by reaction calorimetry and electrospray...
Chang, J. C., Fletcher, M. J., Gurr, G. M., Kent, D. S., Gilbert, R. G.
The mechanical properties, amino acid composition, internal morphology, and solvent-induced interaction of silk produced by the endemic Australian leafhopper, Kahaono montana Evans (Hemiptera:...
Study of rice-starch structure by dynamic light scattering in aqueous solution (2005)
Chiou, H., Fellows, C. .M, Gilbert, R. G., Fitzgerald, M. A.
The expansion of various rice starches in solution was studied using dynamic light scattering (DLS) in order to provide information on their microstructure. Hydrodynamic diameters of starch molecules...
Ab initio emulsion polymerization by RAFT-controlled self-assembly (2005)
Ferguson, C. J., Hughes, R. J., Nguyen, D., Pham, B. T. T., Gilbert, R. G., Serelis, A. K., ...
A method is developed to enable emulsion polymerization to be performed under RAFT control to give living character without the problems that often affect such systems: formation of an oily layer,...
General solution to the band-broadening problem in polymer molecular weight distributions (2005)
Castro, J. V., Van Berkel, K. Y., Russell, G. T., Gilbert, R. G.
A method is developed for overcoming the problem of band broadening ( where a sample which is monodisperse in molecularweight elutes over a range of elution volumes) in order to obtain accurate...
Radical loss in RAFT-mediated emulsion polymerizations (2005)
Prescott, S. W., Ballard, M. J., Rizzardo, E., Gilbert, R. G.
Radical loss processes in RAFT-controlled emulsion polymerization are investigated using γ-initiated seeded emulsion polymerization of styrene in "relaxation mode", i.e.', following the rate of...
Measurement of the molecular weight distribution of debranched starch (2005)
Castro, J. V., Ward, R. M., Gilbert, R. G., Fitzgerald, M. A.
Combining molecular weight distribution (MWD) data for linear chains of debranched starch from capillary electrophoresis and from size exclusion chromatography (SEC) with detection by differential...
Mechanistic information from analysis of molecular weight distributions of starch (2005)
Castro, J. V., Dumas, C., Chiou, H., Fitzgerald, M. A., Gilbert, R. G.
A methodology is developed for interpreting the molecular weight distributions of debranched amylopectin, based on techniques developed for quantitatively and qualitatively finding mechanistic...
Pham, B. T. T., Gilbert, R. G., Fellows, C. M.
Latexes comprising novel copolymers were formed by second-stage emulsion polymerization of dodecyl methacrylate (DMA) onto a hydroxylated polybutadiene-based polyurethane prepolymer (PUD) as seed...
Kinetics of surface grafting on polyisoprene latexes by reaction calorimetry (2004)
Kangwansupamonkon, W., Fellows, C. M., Lamb, D. J., Gilbert, R. G., Kiatkamjornwong, S.
The two-component redox-initiation system, cumene hydroperoxide (CHP) and tetraethylene pentamine (TEPA), was used to polymerize dimethylaminoethyl methacrylate (DMAEMA) in the presence of synthetic...
Pham, T. T. B., Fellows, C. M., Gilbert, R. G.
Homogeneous copolymer latex particles of dodecyl methacrylate (DMA) and low-molecular-weight hydroxy-terminated polybutadiene (HTPB) oligomers were prepared by free-radical polymerization using...
Subramaniam, N., Simpson, A., Monteiro, M. J., Shaffer, O., Fellows, C. M., Gilbert, R. G.
Two methods adapted from biological microscopy are described for a new application in imaging the morphology of rubbery latex particles. In the first method, a drop of latex is frozen in liquid...
Hollow latex particles as submicrometer reactors for polymerization in confined geometries (2004)
Brand, T., Ratinac, K., Castro, J. V., Gilbert, R. G.
A method was developed for free-radical polymerization in the confines of a hollow latex particle. Hollow particles were prepared via the dynamic swelling method from polystyrene seed and...
Synthesis and properties of composites of starch and chemically modified natural rubber (2004)
Rouilly, A., Rigal, L., Gilbert, R. G.
A means is developed for forming polysaccharide-based composites with useful material properties through use of unmodified and chemically modified natural rubber latex (NRL). Starch was used as a...
Effect of surfactant systems on the water sensitivity of latex films (2004)
Butler, L. N., Fellows, C. M., Gilbert, R. G.
The effects of three different types of surfactant systems (ionic, polymeric, and electrosteric stabilizers) on the water sensitivity of poly(butyl acrylate-co-methyl methacrylate) latex films was...
Coen, E. M., Peach, S., Morrison, B. R., Gilbert, R. G.
Kinetic behavior in emulsion polymerization can be conveniently assigned as either 'zero-one' or 'pseudo-bulk'. Sufficiently small particles in emulsion polymerizations obey zero-one kinetics, where...
Synthesis and cross-linking of polyisoprene latexes (2004)
Cheong, I. W., Fellows, C. M., Gilbert, R. G.
Seeded and ab initio emulsion polymerizations of isoprene using redox initiation systems were investigated and suitable reaction conditions determined to prepare polyisoprene latexes with minimal...
Propagation rate coefficient of acrylic acid: theoretical investigation of the solvent effect (2004)
Thickett, S. C., Gilbert, R. G.
The free-radical polymerization propagation rate coefficient (k(p)) of acrylic acid (AA) was calculated using transition state theory and ab initio quantum chemistry in order to shed light on the...
Asua, J. M., Beuermann, S., Buback, M., Castignolles, P., Charleux, B., Gilbert, R. G., ...
Propagation rate coefficients, k(P), for free-radical polymerization of butyl acrylate (BA) previously reported by several groups are critically evaluated. All data were determined by the combination...
Vosloo, J. J., Tonge, M. P., Fellows, C. M., D'Agosto, F., Sanderson, R. D., Gilbert, R. G.
Comblike polymers of poly(n-butyl methacrylate) were prepared using an activated ester-type comonomer (N-acryloxysuccinimide, NAS) to generate branch points. The conventional solution free-radical...
D'Agosto, F., Charreyre, M. T., Pichot, C., Gilbert, R. G.
A method is described for synthesizing latex particles with anchored hairs by the grafting of hydrophilic chains, synthesized by reversible addition-fragmentation chain transfer, onto functionalized....
Water sensitivity of latex-based films (2003)
Butler, L. N., Fellows, C. M., Gilbert, R. G.
A series of polymer latices based on methyl methacrylate (MMA) and butyl acrylate (BA) incorporating electrosteric stabilizers containing acrylic acid (AA) and methacrylic acid (MAA) was prepared,...
D'Agosto, F., Hughes, R., Charreyre, M. T., Pichot, C., Gilbert, R. G.
Controlled radical polymerization of the bisubstituted acrylamide derivative N-acryloylmorpholine (NAM) has the potential to yield telechelic polymers, one end of which can subsequently be, grafted...
Entry in emulsion polymerization: Effects of initiator and particle surface charge (2003)
Van Berkel, K. Y., Russell, G. T., Gilbert, R. G.
The rate coefficient for radical entry into latex particles in emulsion polymerizations is measured for styrene systems in which the entering species are anionic (from persulfate) and cationic (from...
Beuermann, S., Buback, M., Davis, T. P., Garcia, N., Gilbert, R. G., Hutchinson, R. A., ...
Propagation rate coefficients, k(p), which have been previously reported by several groups for free-radical bulk polymerizations of cyclohexyl methacrylate (CHMA), glycidyl methacrylate (GMA), benzyl...
De Bruyn, H., Gilbert, R. G., White, J. W., Schulz, J. C.
Electrosterically stabilized polystyrene latexes with a poly(acrylic acid) hydrophilic layer with either perdeuterated core or perdeuterated hydrophilic layer were prepared in situ in a...
Diffusion coefficients of the monomer and oligomers in hydroxyethyl methacrylate (2003)
Strauch, J., McDonald, J., Chapman, B. E., Kuchel, P. W., Hawkett, B. S., Roberts, G. E., ...
The diffusion coefficients are reported of rubbery ternary systems consisting of the polymer, its monomer analogue (i.e., the saturated equivalent of the monomer), and trace quantities of oligomers...
Using the aggregation of latex polymers in the fabrication of reproducible enzyme electrodes (2003)
Rahmat, W., Fischer, J., Hibbert, D. B., Gilbert, R. G., Gooding, J. J.
An enzyme electrode for glucose is described as a model system to demonstrate a fabrication method using latex aggregation and entrapment of enzyme. Electrosterically-stabilized latex particles...
Smulders, W., Gilbert, R. G., Monteiro, M. J.
The mechanisms were investigated for the seeded emulsion polymerization of styrene mediated by xanthate-based reversible addition-fragmentation chain transfer (RAFT) agents with low transfer...
Effective ab initio emulsion polymerization under RAFT control (2002)
Ferguson, C. J., Hughes, R. J., Pham, B. T. T., Hawkett, B. S., Gilbert, R. G., Serelis, A. K., ...
Prescott, S. W., Ballard, M. J., Rizzardo, E., Gilbert, R. G.
Reversible addition-fragmentation chain transfer (RAFT) polymerization techniques are successfully used to control molecular weight and polydispersity in the seeded emulsion polymerization of...
Polyaniline. Preparation of a conducting polymer (IUPAC technical report) (2002)
Eight persons from five institutions in different countries carried out polymerizations of aniline following the same preparation protocol. In a "standard" procedure, aniline hydrochloride was...
Ferguson, C. J., Russell, G. T., Gilbert, R. G.
A simple model for particle formation in surfactant-free emulsion polymerisation [Macromol. Symp. 92 (1995) 13; Emulsion polymerization: a mechanistic approach, 1995], with extension to allow for...
Zeaiter, J., Romagnoli, J. A., Barton, G. W., Gomes, V. G., Hawkett, B. S., Gilbert, R. G
A detailed dynamic model was developed for a styrene emulsion polymerisation semi-batch reactor to predict the evolution of the product particle size distribution (PSD) and molecular weight...
RAFT in emulsion polymerization: What makes it different? (2002)
Prescott, S. W., Ballard, M. J., Rizzardo, E., Gilbert, R. G.
Reversible addition-fragmentation chain transfer (RAFT) polymerization techniques have been the focus of a great deal of recent work, particularly in their application to emulsion polymerization,...