Reaction and stabilizing mechanism of the cross-type macromonomers in the dispersion polymerization of styrene

Jung, Hyejun; Song, Kijong; Lee, Kangseok; Lee, Byung H.; Choe, Soonja

doi:10.1016/j.jcis.2006.12.057

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…Their reported particle size distributions ranged from PDI = 1.03, which is relatively narrow to 1.34, which is much broader. Choe’s group , reported the synthesis and characterization of a series of bifunctional vinyl urethane macromonomers with different molecular weights, and applied them to the dispersion polymerization of styrene in ethanol. They obtained polystyrene particles with diameters ranging from 1.4 to 4.4 μm and with PDI values ranging from 1.03 to 2.79.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of PMMA Microparticles with a Narrow Size Distribution by Photoinitiated RAFT Dispersion Polymerization with a Macromonomer as the Stabilizer

Tan

Zhao

et al. 2014

Macromolecules

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Macromonomers can serve as efficient and effective stabilizers for dispersion polymerization of monomers such as styrene and methyl methacrylate, but the size distributions of the polymer microparticles obtained tend to be broad. We are interested in functional microbeads which can be used for immunoassays, where the size distribution has to be very narrow. We report a photoinitiated RAFT dispersion polymerization of methyl methacrylate (MMA) in ethanol–water mixtures, with methoxy-poly(ethylene glycol) methacrylate (M n = 2000 g/mol, EO45) as the reactive steric stabilizer. We identify reaction conditions where one can obtain PMMA microspheres with coefficient of variation in the particle diameter (CVd) less than 3%. Carboxy-functional PMMA microspheres were obtained by a two-stage (seeded) polymerization with methacrylic acid (MAA) added as a comonomer in the second stage. We show that the functional microspheres prepared in this way are effective substrates for the covalent attachment of proteins such as BSA and IgG immunoglobulins. In one set of experiments with a dye-labeled secondary antibody, we found that we could detect 104 IgGs per PMMA microbead.

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Section: Introductionmentioning

confidence: 99%

Synthesis of PMMA Microparticles with a Narrow Size Distribution by Photoinitiated RAFT Dispersion Polymerization with a Macromonomer as the Stabilizer

Tan

Zhao

et al. 2014

Macromolecules

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“…This phenomenon was due to either the low value of the macroinitiator dissociation rate constant , or to the high efficiency of the irreversible transfer reaction producing insoluble blocks too short to favor a good anchorage to the particles . In contrast, macromonomers exhibited better stabilizing properties in comparison with the corresponding nonreactive homopolymers − . However, incorporation of the stabilizing macromonomer depends on the reactivity ratios with the comonomer, which may lead to slow consumption and hence induce a lack of efficiency during the nucleation period.…”

Section: Introductionmentioning

confidence: 99%

Dispersion Polymerization of Methyl Acrylate in Nonpolar Solvent Stabilized by Block Copolymers Formed In situ via the RAFT Process

Houillot

Bui

Farcet

et al. 2010

ACS Appl. Mater. Interfaces

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The free-radical dispersion polymerization of methyl acrylate (MA) in isododecane was carried out in the presence of a poly(2-ethylhexyl acrylate) macromolecular RAFT (reversible addition-fragmentation chain transfer) agent bearing a trithiocarbonate reactive group in the middle of the chain (P2EHA-TTC). The presence of the trithiocarbonate function was crucial for the synthesis of monodisperse colloidal poly(methyl acrylate) (PMA) particles stabilized by the P2EHA segments. The hydrodynamic diameters ranged from 100 to 300 nm, using particularly low amounts of the macro(RAFT agent) (1-6 wt % vs. MA) in dispersion polymerizations carried out at 20 wt % solids content. As shown by 2D liquid chromatography, P2EHA-b-PMA or P2EHA-b-PMA-b-P2EHA block copolymers formed in situ at the early stage of the dispersion polymerization due to the reversible transfer process and played the role of particle stabilizer. The glass-transition temperature of the derived polymer films was not affected by the low amount of the chosen macromolecular stabilizer and the mechanical properties were mainly those of PMA, which makes the technique very attractive for coating applications.

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Fabrication of polymeric core-shell nanostructures

Akala

Adesina

2018

Nanoscale Fabrication, Optimization, Scale-Up and Biological Aspects of Pharmaceutical Nanotechnology

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Reaction and stabilizing mechanism of the cross-type macromonomers in the dispersion polymerization of styrene

Cited by 5 publications

References 26 publications

Synthesis of PMMA Microparticles with a Narrow Size Distribution by Photoinitiated RAFT Dispersion Polymerization with a Macromonomer as the Stabilizer

Synthesis of PMMA Microparticles with a Narrow Size Distribution by Photoinitiated RAFT Dispersion Polymerization with a Macromonomer as the Stabilizer

Dispersion Polymerization of Methyl Acrylate in Nonpolar Solvent Stabilized by Block Copolymers Formed In situ via the RAFT Process

Fabrication of polymeric core-shell nanostructures

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