Production of micron-sized, monodisperse composite polymer particles having epoxy groups by seeded dispersion polymerization

Okubo, Masayoshi; Okada, Masahiro; Miya, T.; Takekoh, Ryu

doi:10.1007/s003960100512

Cited by 25 publications

(15 citation statements)

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“…FTIR spectra of unmodified PGMA (A), EDA‐modified PGMA particles (B), and magnetic PGMA‐NH 2 particles (C) are shown in Figure 3. Spectra of PGMA showed characteristic adsorption bands at 1726 cm −1 (carbonyl groups) and 845 and 910 cm −1 (epoxy groups) 32. After modification with EDA, the spectra showed almost complete disappearance of the bands at 845 and 910 cm −1 ; and the new bands at 1645 cm −1 (NH 2 ), 1520 cm −1 (NH), and 1271 cm −1 (CN)33 found in the spectra of PGMA‐NH 2 particles indicated that the modification of the PGMA particles with EDA was successful.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of micron‐sized monodisperse superparamagnetic polymer particles with amino groups

Guan

Liu

2005

J. Polym. Sci. A Polym. Chem.

352

149

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Micron‐sized monodisperse superparamagnetic polyglycidyl methacrylate (PGMA) particles with functional amino groups were prepared by a process involving: (1) preparation of parent monodisperse PGMA particles by the dispersion polymerization method, (2) chemical modification of the PGMA particles with ethylenediamine (EDA) to yield amino groups, and (3) impregnation of iron ions (Fe2+ and Fe3+) inside the particles and subsequently precipitating them with ammonium hydroxide to form magnetite (Fe3O4) nanoparticles within the polymer particles. The resultant magnetic PGMA particles with amino groups were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), X‐ray diffractometry (XRD), and vibrating sample magnetometry (VSM). SEM showed that the magnetic particles had an average size of 2.6 μm and were highly monodisperse. TEM demonstrated that the magnetite nanoparticles distributed evenly within the polymer particles. The existence of amino groups in the magnetic polymer particles was confirmed by FTIR. XRD indicated that the magnetic nanoparticles within the polymer were pure Fe3O4 with a spinel structure. VSM results showed that the magnetic polymer particles were superparamagnetic, and saturation magnetization was found to be 16.3 emu/g. The Fe3O4 content of the magnetic particles was 24.3% based on total weight. © 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 3433–3439, 2005

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Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of micron‐sized monodisperse superparamagnetic polymer particles with amino groups

Guan

Liu

2005

J. Polym. Sci. A Polym. Chem.

352

149

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“…The increased diameters were, respectively, consistent with the corresponding calculated values from the initial amount of monomer and its conversion as shown in Table 1. Our previous studies [28][29][30] indicated that SDP is one of the most useful methods for the preparation of core-shell particles, because a secondary polymer formed in a medium accumulated on seed particles in which viscosity is extremely high. In addition, because P(S-NaSS) has a higher affinity to the methanol/ water (87/13, w/w) medium than PS, the obtained PS/P(S-NaSS) particles should have a core-shell structure.…”

Section: Molecular Weight Measurementmentioning

confidence: 99%

Effects of properties of the surface layer of seed particles on the formation of golf ball-like polymer particles by seeded dispersion polymerization

Konishi

Fujibayashi

Tanaka

et al. 2010

Polym J

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Micrometer-sized, monodisperse polystyrene (PS)/poly(styrene-co-sodium styrene sulfonate) (P(S-NaSS))/poly(n-butyl methacrylate) (Pn-BMA) composite particles having a 'golf ball-like' shape were prepared by seeded dispersion polymerization of n-butyl methacrylate with PS-core/P(S-NaSS)-shell seed particles with various shell thicknesses in the presence of dodecane droplets in a methanol/water (80/20, w/w) medium, followed by evaporation of the dodecane. The effects of the hydrophilic P(S-NaSS)-shell properties of seed particles on the formation of golf ball-like particles were investigated on the basis of thermodynamic and kinetic considerations. The dimples at the surface formed by the volume reduction of Pn-BMA/dodecane domains were deep when PS/P(S-NaSS) seed particles, the hydrophilic shell of which was thick, were used, whereas PS/P(S-NaSS)/Pn-BMA composite particles, the P(S-NaSS) hydrophilic shell of which was thin, exhibited a polyhedral shape. This is attributed to the fact that the molecular weight of the shell moiety comprising P(S-NaSS) was reduced by lowering the monomer concentration to decrease shell thickness, which seems to result in an increase in the mobility of Pn-BMA/dodecane domains at the particle surface. On the basis of this finding, when the molecular weight of the shell moiety of the seed particle was increased, golf ball-like particles were formed, even if the shell thickness of seed particles was thin.

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“…Poly(glycidyl methacrylate) (PGMA) has attracted much attention for its more hydrophilic characteristics than polystyrene and the abundant surface functional epoxy groups, which can be directly coupled with biomolecules or further modified for a variety of biological applications. Spherical PGMA particles are typically produced in aqueous medium by suspension polymerization14, 15 or by multi‐step seeded polymerization 16, 17. Recently, dispersion copolymerization of glycidyl methacrylate (GMA) and other acrylic monomers have also been reported 18, 19.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of monodisperse nonporous crosslinked poly(glycidyl methacrylate) particles with metal affinity ligands for protein adsorption

Guan

Liu

2005

Polymer International

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Monodisperse nonporous crosslinked poly(glycidyl methacrylate) (PGMA) particles with immobilized metal affinity ligands were prepared for selective recovery of proteins. The PGMA particles, with an average size of 2.2 µm, were prepared by a simple dispersion polymerization of glycidyl methacrylate (GMA) and ethylene glycol dimethacrylate (EGDMA). The particles were characterized by scanning electron microscopy (SEM) and Fourier-transform infrared spectroscopy (FTIR). The epoxy groups of the particles were modified with the metal chelating agent iminodiacetic acid (IDA), which forms metal-IDA chelates at the active sites. After charging with copper ions, the particles were used to recover a model protein, bovine hemoglobin (BHb), in a batchwise manner. The particles had the adsorption capacity of 218.7 mg g −1 with little nonspecific adsorption. The adsorption behavior could be described with the Langmuir equation. The effect of pH on the adsorption was also studied. Regeneration of the metal-chelated particles was easily performed with 50 mmol L −1 ethylenediaminetetraacetic acid (EDTA), followed by washing with water and reloading with Cu 2+ . The particles could be very useful as an affinity separation adsorbent.

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Production of micron-sized, monodisperse composite polymer particles having epoxy groups by seeded dispersion polymerization

Cited by 25 publications

References 0 publications

Synthesis and characterization of micron‐sized monodisperse superparamagnetic polymer particles with amino groups

Synthesis and characterization of micron‐sized monodisperse superparamagnetic polymer particles with amino groups

Effects of properties of the surface layer of seed particles on the formation of golf ball-like polymer particles by seeded dispersion polymerization

Synthesis of monodisperse nonporous crosslinked poly(glycidyl methacrylate) particles with metal affinity ligands for protein adsorption

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