Hydrogel Microspheres II. Precipitation Copolymerization of Acrylamide with Comonomers to Prepare Monodisperse Hydrogel Microspheres

Kawaguchi, Haruma; Yamada, Yukino; Kataoka, Shinobu; Morita, Yuki; Ohtsuka, Yasuji

doi:10.1295/polymj.23.955

Cited by 47 publications

(28 citation statements)

References 10 publications

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“…Microgels may also be produced by dispersion polymerization of multifunc tional monomers [276,277]. Kim et al synthesized microgels by copolymerization of acrylamide with acryloyl terminated polyethylene glycol macromonomers in ethanol or in selective solvents [276].…”

Section: Other Techniques For Microgel Synthesismentioning

confidence: 99%

Microgels-Intramolecularly Crossünked Macromolecules with a Globular Structure

Funke

Okay

Joos-Müller³

Advances in Polymer Science

252

223

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Section: Other Techniques For Microgel Synthesismentioning

confidence: 99%

Microgels-Intramolecularly Crossünked Macromolecules with a Globular Structure

Funke

Okay

Joos-Müller³

Advances in Polymer Science

252

223

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“…Figure 12 Photograph of thin film substances. Photograph of microspheres taken with opthree kinds of monomer anisotropically.…”

Section: Thin-film Substancesmentioning

confidence: 99%

Survey of preparation techniques of monodispersed microspheres of glycidyl methacrylate and its derivatives

Hoshino

Arishima

1995

J of Applied Polymer Sci

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SYNOPSISThis article describes the preparation of monodispersed microspheres of glycidyl methacrylate, 2-hydroxyethyl methacrylate, and triethylene glycol dimethacrylate by radical polymerization. The initial stage of the polymerization reaction began in the liquid phase. As the polymerization proceeded, a nuclear polymer chain of microspheres was generated from soluble oligomeric radicals and then solidified from the liquid phase. The radius of the microspheres was controlled by polymerization parameters, such as monomer concentration, polymerization time, and the kind of polymerization solvent.A small number of thin platelike substances may be produced by the anisotropy of the two-dimensional monomer added to the oligomeric radicals. The monodispersed microspheres were achieved through the use of the following: (1) a fluorinated tube in which the polymerization reaction proceeded; (2) a monomer concentration of about 1 mol/L; (3) a higher concentration of crosslinking reagent than used commercially; (4) the prevention of the occurrence of polymer microsphere aggregation; (5) pouring the solution mixtures into a large amount of cooled acetone after the polymerization reaction; and (6) the use of a low-temperature purification process and centrifugation a t low temperature. This article describes the mechanism of microsphere formation and growth by solution polymerization. 0 1995 John Wiley & Sons, Inc.

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“…This represents that the polymerization in the continuous phase was independent of the microsphere formation and growth. [12][13][14] A variety of research groups have focused on the interaction between solvents and polymers and attempted to find the relationship between microsphere formation and properties of solvents. Yet, the interaction between solvents and monomer is not considered at this study now that it leads to the phase separation of the solvent/monomer prior to the polymerization.…”

Section: Introductionmentioning

confidence: 99%

Characterizations of Modified Silica Nanoparticles(II) ; Preparation and Application of Silica Nanoparticles as a Environmentally Filler

Min¹,

Bae²,

Park³

et al. 2012

Korean. J. Mater. Res.

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A chemical process involves polymerization within microspheres, whereas a physical process involves the dispersion of polymer in a nonsolvent. Nano-sized monodisperse microspheres are usually prepared by chemical processes such as water-based emulsions, seed suspension polymerization, nonaqueous dispersion polymerization, and precipitation polymerizations. Polymerization was performed in a four-necked, separate-type flask equipped with a stirrer, a condenser, a nitrogen inlet, and a rubber stopper for adding the initiator with a syringe. Nitrogen was bubbled through the mixture of reagents for 1 hr. before elevating the temperature. Functional silane (3-mercaptopropyl)trimethoxysilane (MPTMS) was used for the modification of silica nanoparticles and the self-assembled monolayers obtained were characterized by X-ray photoelectron spectroscopy (XPS), laser scattering system (LSS), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), elemental analysis (EA), and thermogravimetric analysis (TGA). In addition, polymer microspheres were polymerized by radical polymerization of γ-mercaptopropyl modified silica nanoparticles (MPSN) and acrylamide monomer via precipitation polymerization; then, their characteristics were investigated. From the elemental analysis results, it can be concluded that the conversion rate of acrylamide monomer was 93% and that polyacrylamide grafted to MPSN nanospheres via the radical precipitation polymerization with AAm in ethanol solvent. The microspheres were successfully polymerized by the 'graft from' method.

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Hydrogel Microspheres II. Precipitation Copolymerization of Acrylamide with Comonomers to Prepare Monodisperse Hydrogel Microspheres

Cited by 47 publications

References 10 publications

Microgels-Intramolecularly Crossünked Macromolecules with a Globular Structure

Microgels-Intramolecularly Crossünked Macromolecules with a Globular Structure

Survey of preparation techniques of monodispersed microspheres of glycidyl methacrylate and its derivatives

Characterizations of Modified Silica Nanoparticles(II) ; Preparation and Application of Silica Nanoparticles as a Environmentally Filler

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