Emulsion polymerization of supermicron, monodisperse acrylic copolymer particles with core‐shell structures

O’Callaghan, K. J.; Paine, Anthony J.; Rudin, Alfred

doi:10.1002/pola.1995.080331112

Cited by 21 publications

(13 citation statements)

References 25 publications

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“…Figure 7 demonstrates a master curve derived from Figure 6 by applying time–temperature superposition techniques 23, 24. Data at different temperatures can be superimposed by horizontal translation along the log ω axis.…”

Section: Resultsmentioning

confidence: 99%

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Rheological behavior and microstructure of aqueous suspension of carboxylated core-shell structured latex particle

Nakamura¹,

Tachi²

2000

J. Appl. Polym. Sci.

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Core‐shell type carboxylated particles form a flocculated structure in aqueous suspension with neutralization of carboxyl groups. Rheological behaviors of the suspension have been studied at various temperatures, and microstructures of the suspension have been discussed from the rheological behaviors and SAXS measurements. At 25°C, G′ is larger than G″ in all ω regions, and G′ is almost independent of ω, and the diffraction peak is detected by SAXS. These results mean that a three‐dimensional network of interconnected lattice‐like flocculated structure is formed. With increasing temperature, ω dependency of G′ becomes stronger and distance of the particles of the structure does not changed. These mean the network linkage is disrupted partially by thermal motion, and the interconnected lattice‐like flocculated structure changes to an isolated lattice‐like one with increasing temperature. With increasing the degree of neutralization, an isolated structure changes to an interconnected three‐dimensional structure decreasing the thermal motion just like decreasing temperature. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1627–1633, 2001

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Section: Resultsmentioning

confidence: 99%

“…The carboxylated core‐shell particle was obtained by semicontinuoous two‐stage feed emulsion polymerization 21–24. The equipment used was a 1‐L four‐neck reactor, fitted with a reflux condenser, a mechanical stirrer, a nitrogen inlet, and a dropping funnel, and kept in a water bath.…”

Section: Methodsmentioning

confidence: 99%

Rheological behavior and microstructure of aqueous suspension of carboxylated core-shell structured latex particle

Nakamura¹,

Tachi²

2000

J. Appl. Polym. Sci.

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“…Only a few reports in the literature have described polymer‐based core–shell particles of a micrometer size. Through the use of a series of sequential seeded growth‐emulsion polymerizations, Rundin's11 group prepared monodisperse latex core–shell particles with diameters of 3 μm. There have been a few reports on core–shell particles of a micrometer size prepared by dispersion polymerization: Laus et al12, 13 reported the preparation of monodisperse polystyrene particles 2–10 μm in size in the presence of a poly(carboxylic acid) or a polyepichlorohydrine steric stabilizer, which itself then constituted the shell.…”

Section: Introductionmentioning

confidence: 99%

Narrow‐disperse or monodisperse crosslinked and functional core–shell polymer particles prepared by two‐stage precipitation polymerization

Bai

Yang

Huang

2006

J of Applied Polymer Sci

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Narrow-disperse and monodisperse crosslinked core-shell polymer particles containing different functional groups, such as esters, hydroxyls, chloromethyls, carboxylic acids, amides, cyanos, and glycidyls, in the shell layers in the micrometer size range were prepared by a two-stage precipitation polymerization in the absence of any stabilizer. Commercial divinylbenzene (DVB), containing 80% DVB, was precipitation polymerized in acetonitrile without any stabilizer as the first-stage polymerization and was used as the core. Several functional monomers, including methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-hydroxyethyl methacrylate, glycidyl methacrylate, methyl acrylate, ethyl acrylate, butyl acrylate, t-butyl acrylate, i-octyl acrylate, acrylic acid, acrylamide, acrylonitrile, styrene, and p-chloromethyl styrene, were incorporated into the shells during the second-stage polymerization. The resulting core-shell polymer particles were characterized with scanning electron microscopy and Fourier transform infrared spectroscopy.

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“…The thickness of the polymeric shell varied from 80 to 300 nm, and it could be further increased using a multistage polymerization process. 9 The three-layer particles had PDI ) 1.14 ( 0.05.…”

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confidence: 99%

A New Approach to Hybrid Nanocomposite Materials with Periodic Structures

2002

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Hybrid core-shell polymer-semiconductor or polymer-metal microspheres were used in the "bottom-top" approach to production of nanocomposite materials with periodic structures. In the first step CdS and Ag nanocrystals were synthesized in situ on the surface of polymer microspheres using ion exchange between the counter ions in the electrical double layer of latex beads and ions in the liquid medium. In the second step a low-Tg polymeric shell was synthesized on the surface of hybrid particles, which upon annealing of the periodic array of three-layer microbeads formed a matrix. The proposed strategy employing hybrid microspheres as the functional structural blocks shows a new way to produce optically responsive materials with periodicity commensurable with the wavelength of light, an intrinsic property of photonic crystals.

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Emulsion polymerization of supermicron, monodisperse acrylic copolymer particles with core‐shell structures

Cited by 21 publications

References 25 publications

Rheological behavior and microstructure of aqueous suspension of carboxylated core-shell structured latex particle

Rheological behavior and microstructure of aqueous suspension of carboxylated core-shell structured latex particle

Narrow‐disperse or monodisperse crosslinked and functional core–shell polymer particles prepared by two‐stage precipitation polymerization

A New Approach to Hybrid Nanocomposite Materials with Periodic Structures

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