Thermodynamics of Swelling of Polymer, Oligomer and Polymer-Oligomer Particles. Preparation and Application of Monodisperse Polymer Particles.

Ugelstad, J.; Mørk, Preben C.; Mfutakamba, H. R.; Soleimany, E.; Nordhuus, I.; Schmid, Ruth; Berge, Arvid; Ellingsen, T.; Aune, Oddvar; Nustad, Kjell

doi:10.1007/978-94-017-4797-4_3

Cited by 71 publications

(28 citation statements)

References 26 publications

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“…Although monomers bearing carboxyl or aliphatic hydroxyl groups, such as methacrylic acid and HEMA, are commercially available, their use for the preparation of monodisperse porous beads is scarce. Despite Ugelstad's report on the preparation of very small monodisperse nonporous 2.5 lm poly(HEMA-co-methyl methacrylate-co-EDMA) particles for RIA applications with no details revealed [100], water-soluble monomers were generally thought to be inappropriate for the staged templated suspension process.…”

Section: Preparation Of Porous Beadsmentioning

confidence: 93%

Methacrylate‐based chromatographic media

Beneš

Horák

Švec³

2005

J of Separation Science

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This review summarizes the preparation and application of chromatographic separation media based on methacrylate monomers with a major focus on highly crosslinked macroporous beads prepared from 2-hydroxyethyl methacrylate and glycidyl methacrylate, respectively. The effects of process variables such as composition of the polymerization mixture that includes monomers, porogenic solvents, and free radical initiator, suspension stabilizer, reaction temperature, and stirring are detailed for both classical and templated suspension polymerization. In addition, specific features of the preparation of monodisperse beads are also discussed. The performance of methacrylate-based separation media is demonstrated on numerous separations in a variety of chromatographic modes.

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Section: Preparation Of Porous Beadsmentioning

confidence: 93%

Methacrylate‐based chromatographic media

Beneš

Horák

Švec³

2005

J of Separation Science

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“…(20), where R nuc is the nucleation rate, k am the rate coefficient for radical entry into the micelles, and N m the number of micelles in the reactor given by Eq. (21).…”

Section: Heterogeneous Nucleationmentioning

confidence: 99%

“…(21), CMC is the critical micellar concentration [mol m À3 aqueous phase ] and hence CMC Á V w is the amount of surfactant dissolved in the aqueous phase; n m is the aggregation number (average number of molecules of surfactant per micelle); and S w [mol] is the amount of surfactant that is in the aqueous phase forming micelles and dissolved in such a phase. S w can be calculated by means of the overall material balance for the surfactant, Eq.…”

Section: Heterogeneous Nucleationmentioning

confidence: 99%

Emulsion Polymerization

Cal¹,

Leiza²,

Asua³

et al. 2005

Handbook of Polymer Reaction Engineering

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“…After the space laboratory was forced to shut down temporarily, they overcame the gravity on the ground, and finally extended the particle diameter as large as 100 pm. Ugelstad et al developed the two-stage swelling technique, which is capable of swelling the original seeds up to a thousand times in volume with monomers, 3,4 and have established commercial-scale production of a variety of uniform spheres as large as 100 pm. 5 Ohkubo et a1.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of polymeric microspheres employing SPG emulsification technique

Omi

Katami

Yamamoto

et al. 1994

J of Applied Polymer Sci

185

100

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SYNOPSISRelatively uniform polymeric microspheres, the coefficients of variation being close to lo%, were obtained by the BPO-initiated suspension polymerization of styrenic monomers. Unlike the conventional stirred-tank system, a particular microporous glass membrane ( SPG ) provided uniform monomer droplets continuously when monomer was allowed to permeate through the micropores. The monomer droplets were suspended in an aqueous solution containing the stabilizing agents, transferred to a stirred vessel, and polymerized. Up to 10 pm spheres, of a far narrower size distribution than those obtained by conventional microsuspension polymerization spheres, were obtained. The initial droplet size and distribution were retained with the successful suppression of secondary particle nucleation by the addition of hydroquinone in the aueous phase. Crosslinked polystyrene spheres were also synthesized in the presence of various low-molecular-weight diluents. While a good solvent, toluene, was not so effective; poor solvents, n-hexane and n-heptane, easily yielded the microporous structure, the specific surface area being as high as 160 m2/g.

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Thermodynamics of Swelling of Polymer, Oligomer and Polymer-Oligomer Particles. Preparation and Application of Monodisperse Polymer Particles.

Cited by 71 publications

References 26 publications

Methacrylate‐based chromatographic media

Methacrylate‐based chromatographic media

Emulsion Polymerization

Synthesis of polymeric microspheres employing SPG emulsification technique

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