Particle Size in Suspension Polymerization

Winslow, F. H.; Matreyek, W.

doi:10.1021/ie50497a031

Cited by 66 publications

(40 citation statements)

References 5 publications

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“…The use of solid particles as stabilizers in emulsion-based polymerization techniques was first described in open literature by Hohenstein [88,89] for suspension polymerizations in the 1940s. Winslow and Martreyek [90] investigated the influence of both solid inorganic particles such as bentonite and Ca 3 (PO) 4 and organic stabilizers on the suspension polymerization of mixtures of DVB with ethylvinylbenzene. Wiley [91], in 1954, showed that monomer droplets of styrene dispersed in water in the presence of Dowex-50 ionexchange resin beads or bentonite clay led to adhesion of the solid particles onto the surface of the droplets.…”

Section: Polymerization Of Emulsion Droplets Armored With Inorganic Nmentioning

confidence: 99%

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Teixeira

Bon

2010

Hybrid Latex Particles

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In this chapter, we will highlight conceptual physical approaches towards the fabrication of nanocomposite polymer latexes in which each individual latex particle contains one or more "hard" nanoparticles, such as clays, silicates, titanates, or other metal(oxides). By "physical approaches" we mean that the "hard" nanoparticles are added as pre-existing entities, and are not synthesized in situ as part of the nanocomposite polymer latex fabrication process. We will narrow our discussion to focus on physical methods that rely on the assembly of nanoparticles onto the latex particles after the latex particles have been formed, or its reciprocal analogue, the adhesion of polymer onto an inorganic nanoparticle. First, will discuss the phenomenon of heterocoagulation and its various driving forces, such as electrostatic interactions, the hydrophobic effect, and secondary molecular interactions. We will then address methods that involve assembly of nanoparticles onto or around the more liquid precursors (i.e., swollen/growing latex particles or monomer droplets). We will focus on the phenomenon of Pickering stabilization. We will then discuss features of particle interaction with soft interfaces, and see how the adhesion of particles onto emulsion droplets can be applied in suspension, miniemulsion, and emulsion polymerization. Finally, we will very briefly mention some interesting methods that make use of interface-driven templating for making well-defined assembled clusters and supracolloidal structures.

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Section: Polymerization Of Emulsion Droplets Armored With Inorganic Nmentioning

confidence: 99%

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Teixeira

Bon

2010

Hybrid Latex Particles

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“…[12][13][14]16,20,33,34 Many experimental factors have an effect on the morphological properties and on the size of the microparticles synthesized. However, once a set of values of synthesis conditions that lead to optimal morphologic characteristics of the microparticles (Table I) has been established, the following task is to study the effects of the geometric factors of the experimental device on the properties related to the size of the microparticles obtained.…”

Section: Factor Identificationmentioning

confidence: 99%

Influence of the geometric factors of the experimental device used in suspension polymerization on the properties of poly(styrene‐co‐divinylbenzene) microparticles

Rodrigo

Toro

Cuellar

2011

J of Applied Polymer Sci

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The prediction of the final particle size for reactive systems such as the reactions of suspension polymerization is a complex matter. Thus, the preparation of very small microparticles is specially challenging, probably because of the coalescence of the polymeric beads taking place during the later stages of the polymerization. In this work, very small gel-type styrene-co-divinylbenzene beads were synthesized by using a previously determined set of experimental synthesis conditions in which the stabilization of the dispersion of the monomeric droplets was ensured, and, under these conditions, the factors related to the geometry of the experimental device were modified to determine their actual effect on the final size of the microparticles. From the experimental results, a very simple and useful model was obtained that was able to predict the final size of the microparticles as a function of the values of the geometric factors of the reactor. This model indicates that the most influential factors in the final size of the microparticles are the liquid depth inside the reactor and the stirrer diameter; thus, an increase in the liquid depth produces larger particles, and, conversely, the particle size decreases when using larger stirrer diameters. Additionally, the model permits the design of polymerization experiments aimed at obtaining microparticles with a diameter smaller than 50 lm.

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“…In essence, the swelling properties of the resin beads depend on the crosslinking degree and, therefore, on the relative amount of DVB in the core monomer [37,38]. Resins containing a low crosslinking degree (typically 1-2% DVB) show a higher swelling capacity than those with a higher content of DVB (>5%) [39].…”

Section: Crosslinked Polystyrene-derived Matricesmentioning

confidence: 99%

Solid Phase and Combinatorial Chemistry in the Heterocyclic Field

Villalgordo¹

2011

Modern Heterocyclic Chemistry

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Particle Size in Suspension Polymerization

Cited by 66 publications

References 5 publications

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Physical Methods for the Preparation of Hybrid Nanocomposite Polymer Latex Particles

Influence of the geometric factors of the experimental device used in suspension polymerization on the properties of poly(styrene‐co‐divinylbenzene) microparticles

Solid Phase and Combinatorial Chemistry in the Heterocyclic Field

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