Anionic dispersion polymerization of styrene. I. Investigation of parameters for preparation of uniform micron‐size polystyrene particles with narrow molecular weight distribution

Awan, M. A.; Dimonie, Victoria L.; El‐Aasser, M. S.

doi:10.1002/(sici)1099-0518(19960930)34:13<2633::aid-pola9>3.3.co;2-r

Cited by 12 publications

(32 citation statements)

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“…Decreasing stabilizer concentration led to an increase in particle size, with no effect on polydispersity [83,85].…”

Section:  Effect Of Stabilizer Concentrationmentioning

confidence: 53%

“…These studies were performed in hexane for polystyrene particles stabilized with either polystyrene-block-poly(4-trimethylsilylstyrene) (PS-b-PTMSS) [82], polystyrene-block-polybutadiene (PS-b-PB) (Stereon 721A or 730A) [83,84], polystyrene-block-poly(t-butylstyrene) (PS-b-PBS) [85] or polystyrene-block-polyisobutylene (PS-b-PIB) [86]. (Figure 16)…”

Section:  Diblock Copolymermentioning

confidence: 95%

“…Further increase in stabilizer concentration did not improve the particle size distribution [82]. Awan et al [83] found that Stereon 730A was more efficient in producing monodisperse micron-sized particles compared to Stereon 721A ( Figure 17). Stereon 721A was less effective because of its short polystyrene anchoring block, resulting in particle flocculation as the stabilizers desorbed easily.…”

Section:  Diblock Copolymermentioning

confidence: 96%

“…[86] also observed an inverse relationship between particle size and molecular weight of polystyrene anchoring block. Although with a larger polystyrene block, particle dispersions displayed narrower size distributions [83,86]. Kim et al deduced their observations based on the size of the poly(t-butylstyrene) stabilizing block [85].…”

Section:  Diblock Copolymermentioning

confidence: 99%

“…Awan et al investigated the efficiency of the triblock copolymer, polystyrene-polybutadiene-polystyrene (Stereon 840A), in the synthesis of polystyrene particles in hexane [83]. Stereon 840A, with MW 94,000 and 43% polystyrene block, yielded 1.8 µm particles with relatively broad size distribution ( Figure 16).…”

Section:  Triblock Copolymermentioning

confidence: 99%

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Dispersion polymerization in non-polar solvent: Evolution toward emerging applications

Richez

Yow

Biggs

et al. 2013

Progress in Polymer Science

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Currently, there is a resurgence of interest in the preparation of monodisperse, size-controlled latex particles in non-polar solvents by the dispersion polymerization technique. This technique has great potential for manufacturing bespoke latex particles for emerging applications such as the use of latex particles in electrophoretic displays, where one of the numerous requirements is that the particle systems be suspended in low dielectric constant, non-polar solvents. This article reviews the academic literature around the typical monomers used in non-polar dispersion polymerization. It briefly introduces the origin of the technique and the initial seminal work carried out in this area. It also describes how such particles have been used in the past as model colloids for academic purposes and provide recent examples where dispersion polymerization is used to create novel functional particles. Subsequently, the article provides a thorough knowledge basis for each monomer used in non-polar dispersion polymerization, with a focus on the evolution of the technique, including progress in controlling the final particle characteristics and in designing novel effective stabilizers. Finally, a brief review on the use of the technique to prepare well-controlled latex particles in supercritical fluids is also presented.

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“…Decreasing stabilizer concentration led to an increase in particle size, with no effect on polydispersity [83,85].…”

Section:  Effect Of Stabilizer Concentrationmentioning

confidence: 53%

Section:  Diblock Copolymermentioning

confidence: 95%

Section:  Diblock Copolymermentioning

confidence: 96%

Section:  Diblock Copolymermentioning

confidence: 99%

Section:  Triblock Copolymermentioning

confidence: 99%

See 3 more Smart Citations

Dispersion polymerization in non-polar solvent: Evolution toward emerging applications

Richez

Yow

Biggs

et al. 2013

Progress in Polymer Science

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Tuning the particle size and charge density of the crosslinked polystyrene particles

Arunbabu

Sannigrahi

Jana

2008

J of Applied Polymer Sci

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ABSTRACT:We report the synthesis of charged spherical colloidal particles of poly [styrene-(co-2-propene sulfonic acid)] crosslinked with divinylbenzene by emulsion polymerization. The effects of concentration of both the emulsifier and initiator on the polymerization, particle size, and charge density are studied. The particle size is found to be dependent on both the emulsifier and initiator concentration and their power dependencies are different. Below critical micelle concentration (CMC), the particle size varies significantly within a small range of emulsifier concentration. In contrast, particle size decrease is not very pronounced at the heterogeneous (micellar) particle nucleation regime where the emulsifier concentration is well above of the CMC. The power dependencies of the number of particles on surfactant concentration are explained in the light of conversion-time profile of the polymerization. The surface charge density of the colloidal particles also varies with both the emulsifier and initiator concentration. Both the particle size and charge density show an inverse relation with the molecular weight of the polymer.

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Role of dispersion stabilizer with hydroxy groups in preparation of monodisperse polylactide microspheres

Muranaka

Ono

2009

J. Polym. Sci. A Polym. Chem.

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Monodisperse poly(D,L-lactide) (PDLLA) microspheres were prepared by dispersion polymerization of D,L-lactide in xylene/heptane (1/2, v/v) with poly[(dodecyl methacrylate)-co-(2-hydroxyethyl methacrylate)] (P(DMA-co-HEMA)) as a dispersion stabilizer. P(DMA-co-HEMA) contains hydroxy groups, which act as an initiation group for pseudoanionic dispersion polymerization. The best coefficient of variation (CV) values concerning particle diameter distribution and the particle diameter of obtained PDLLA microspheres were 3.7% and 5.3 lm, respectively. The particle diameter decreased with increasing concentration of P(DMA-co-HEMA) and HEMA maintained low CV (\10%) values. As a result, monodisperse PDLLA microspheres ranging from 1.3 to 5.3 lm were obtained. In addition, it was found that monodisperse PDLLA microspheres were obtained by sufficient capture of growing polymers and monomers in the particle growth stage. Therefore, the HEMA concentration in P(DMA-co-HEMA) strongly affecting the capturing capability is the most important factor.

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Anionic dispersion polymerization of styrene. I. Investigation of parameters for preparation of uniform micron‐size polystyrene particles with narrow molecular weight distribution

Cited by 12 publications

References 0 publications

Dispersion polymerization in non-polar solvent: Evolution toward emerging applications

Dispersion polymerization in non-polar solvent: Evolution toward emerging applications

Tuning the particle size and charge density of the crosslinked polystyrene particles

Role of dispersion stabilizer with hydroxy groups in preparation of monodisperse polylactide microspheres

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