Formation of tethered polyacrylic acid loops in core-shell micelles (2007)
Whittaker, M.R., Urbani, C.N., Monteiro, M.J.
Well-defined amphiphilic four-arm star P(AA-b-STY) block copolymers have been dispersed in water to form core-shell micelles in which the shell consists of tethered PAA loops. The entropic penalty...
In vitro mineralization of phosphate-containing polymer ad-layers (2007)
Suzuki, S., Rintoul, L., Monteiro, M. J., Wentrup-Byrne, E., Grondahl, L.
Degradative chain transfer in vinyl acetate polymerizations using toluene as solvent (2007)
Lonsdale, D. E., Johnston-Hall, G., Fawcett, A., Bell, C. A., Urbani, C. N., Whittaker, M. R., ...
In this work, we propose that retardation in vinyl acetate polymerization rate in the presence of toluene is due to degradative chain transfer. The transfer constant to toluene (C-trs) determined...
Johnston-Hall, G., Monteiro, M. J.
A universal methodology to obtain the termination rate coefficients in free radical polymerization as a function of conversion and chain length was used to describe the RAFT-mediated "living" radical...
Surface-Functionalized Polymer Nanoparticles for Selective Sequestering of Heavy Metals (2006)
C. A. Bell, S. V. Smith, M. R. Whittaker, A. K. Whittaker, L. R. Gahan, M. J. Monteiro
This is the highest impact factor journal (8.078) for Material Science. The work involves the synthesis of polymer nanoparticles with functional surfaces and polymer chemical composition for...
Effect of degassing on surfactant-free emulsion polymerizations of styrene mediated with RAFT (2006)
This work has demonstrated that for the first time a single RAFT agent (i. e., difunctional) can be used in conjunction with a radical initiator to obtain a desired M-n and PDI with controlled rates...
Barner-Kowollik, C., Buback, M., Charleux, B., Coote, M. L., Drache, M., Fukuda, T., ...
Investigations into the kinetics and mechanism of dithiobenzoate-mediated Reversible Addition-Fragmentation Chain Transfer (RAFT) polymerizations, which exhibit nonideal kinetic behavior, such as...
Whittaker, M. R., Goh, Y. K., Gemici, H., Legge, T. M., Perrier, S., Monteiro, M J
By carefully controlling the concentration of alpha,omega-thiol polystyrene in solution, we achieved formation of unique monocyclic polystyrene chains (i.e., polymer chains with only one disulfide...
Synthesis and characterisation of phophate polymers for biomedical applications (2006)
Suzuki, S., Whittaker, M R, Grondahl, L, Wentrup, C, Monteiro, M J
Percec, V., Guliashvili, T., Ladislaw, J. S., Wistrand, A., Stjerndahl, A., Sienkowska, M. J., ...
Conventional metal-catalyzed organic radical reactions and living radical polymerizations (LRP) performed in nonpolar solvents, including atom-transfer radical polymerization (ATRP), proceed by an...
Surface-Functionalized Polymer Nanoparticles for Selective Sequestering of Heavy Metals (2006)
C. A. Bell, S. V. Smith, M. R. Whittaker, A. K. Whittaker, L. R. Gahan, M. J. Monteiro
This is the highest impact factor journal (8.078) for Material Science. The work involves the synthesis of polymer nanoparticles with functional surfaces and polymer chemical composition for...
RAFT-mediated emulsion polymerization of styrene using a non-ionic surfactant (2006)
Urbani, C. N., Nguyen, H. N., Monteiro, M. J.
We report the successful RAFT-mediated emulsion polymerization of styrene using a non-ionic surfactant (Brij98), the highly reactive 1-phenylethyl phenyldithioacetate (PEPDTA) RAFT agent, and...
Synthesis and aggregation behavior of four-arm star amphiphilic block copolymers in water (2006)
Whittaker, M. R., Monteiro, M. J.
We report the first synthesis of amphiphilic four-arm star diblock copolymers consisting of styrene (STY) and acrylic acid (AA) made using reversible addition-fragmentation chain transfer (RAFT; Z...
Surface-functionalized polymer nanoparticles for selective sequestering of heavy metals (2006)
Bell, C. A., Smith, S. V., Whittaker, M. R., Whittaker, A. K., Gahan, L. R., Monteiro, M. J.
Xanthate-mediated (reversible addition-fragmentation chain transfer) emulsion polymerization has been used to create novel polystyrene nanoparticles with functionalized surfaces (see Figure) for the...
Goh, Y. K., Whittaker, M. R., Monteiro, M. J.
The use of phenyldithioacetic acid (PDA) in homopolymerizations of styrene or methyl acrylate produced only a small fraction of chains with dithioester end groups. The polymerizations using...
NEEM: Network-friendly Epidemic Multicast (2004)
J. Pereira, L. Rodrigues, M. J. Monteiro, R. Oliveira
Epidemic, or probabilistic, multicast protocols have emerged as a viable mechanism to circumvent the scalability problems of reliable multicast protocols. However, most existing epidemic approaches...
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...
RAFT synthesis of phosphate polymers for biomedical applications (2004)
Suzuki, S., Whittaker, A. K., Monteiro, M. J., Grondahl, L., Wentrup-Byrne, E.
Venkatesh, R., Staal, B. B. P., Klumperman, B., Monteiro, M. J.
The mechanism of the reversible addition-fragmentation chain transfer (RAFT) process using cumyl dithiobenzoate has been the subject of intense debate. In an attempt to shed more light into the side...
Protein transfer through polyacrylamide hydrogel membranes polymerized in lyotropic phases (2004)
Monteiro, M. J., Hall, G., Gee, S., Xie, L.
A way to control the average pore size in cross-linked polyacrylamide-based membranes is by altering the ratio of cross-linker to acylamide monomer. Larger pore sizes are prepared with a minimum...
The work described here has shown for the first time that well-defined core-shell nanostructures with controlled particle size and molecular weight distributions (in which the molecular weight...
NEEM: Network-friendly Epidemic Multicast (2003)
J. Pereira, L. Rodrigues, M. J. Monteiro, R. Oliveira
Epidemic, or probabilistic, multicast protocols have emerged as a viable mechanism to circumvent the scalability problems of reliable multicast protocols. However, most existing epidemic approaches...
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...
Influence of the chemical structure of MADIX agents on the RAFT polymerization of styrene (2003)
Adamy, M., Van Herk, A. M., Destarac, M., Monteiro, M. J.
Xanthates (MADIX agents) are an important class of RAFT agents. Currently, they are the only "living" agent that can be successfully used in a classical ab inito emulsion polymerization (i.e., where...
High-pressure 'living' free-radical polymerization of styrene in the presence of RAFT (2002)
Monteiro, M. J., Bussels, R., Beuermann, S., Buback, M.
Reversible addition-fragmentation chain transfer (RAFT) polymerization of styrene was studied at high pressure, employing two dithioester RAFT agents with an isopropylcyano (5) and a cumyl (6)...
Suwier, D. R., Monteiro, M. J., Vandervelden, A., Koning, E.
UV and thermal polymerisations of styrene were carried out in the presence of conventional 'iniferters'. The mechanisms of the two methods were investigated and provided new insight into the...
Monteiro, M. J., De Barbeyrac, J.
Communication: A new class of polymer (nanocomposite) materials of di- and triblock polymers of polystyrene, poly(butyl acrylate) and poly(acetoacetoxyethyl methacrylate) with a core-shell particle...
Rational design of polymer colloids (2001)
Lamb, D., Anstey, J. F., Lee, D. Y., Fellows, C. M., Monteiro, M. J., Gilbert, R. G.
Recent advances in understanding of the fundamental mechanistic events in emulsion polymerization give the potential for rational design of new materials based on polymer colloids. It is now possible...
Lamb, D. J., Anstey, J. F., Fellows, C. M., Monteiro, M. J., Gilbert, R. G.
A diffuse layer of water-soluble polymer chemically grafted to the surface of a hydrophobic polymer colloid has been created by the second-stage polymerization of dimethylaminoethyl methacrylate...
Monteiro, M. J., Subramaniam, N., Taylor, J. R., Pham, B. T. T., Tonge, M. P., Gilbert, R. G.
The kinetics of free-radical polymerisation of vinyl neo-decanoate (VneoD) and the molecular weight distributions (MWDs) of the polymers formed in the presence and absence of low molecular weight...
Monteiro, M. J., Bussels, R., Wilkinson, T. S.
Reactive surfactants allow the surfactant molecules to become covalently bound to the particles and thus provide added stability to the colloid particles, longer shelf life, better shear resistance,...
Wilkinson, T. S., Boonstra, A., Montoya-Goni, A., Van Es, S., Monteiro, M. J., German, A. L.
The synthesis and characterization of a new type of chain-transfer-active surfactant (i.e., TRANSURF) is reported. The compound was designed on the basis of the chemistry of macromers, which undergo...
Tsavalas, J. G., Schork, F. J., De Brouwer, H., Monteiro, M. J.
In theory, a miniemulsion should be an ideal environment for "living" radical polymerization via the reversible addition-fragmentation chain transfer process (RAFT). Compartmentalization minimizes...
Monteiro, M. J., De Barbeyrac, J.
The ab initio emulsion polymerizations of styrene in the presence of RAFT agent (1-(O-ethylxanthyl)ethylbenzene; 1) with a low chain transfer constant to styrene (C-tr similar to 0.8) were carried...