Reactive surfactants in emulsion polymerization

Guyot, Alain; Tauer, Klaus

doi:10.1007/bfb0024126

Cited by 164 publications

(116 citation statements)

References 37 publications

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“…The increased stability of the polymer particles may mainly result from the chemically bound molecules of Tw per 20 at the particle surface. The accumulation of surface active moieties of surface active macroinitiator (surfinit) at the particle surface forms fine polymer dispersions with high stability [34,35]. The difference might come from the fact that the final (limiting) conversions in the present work were much below 100% conversion.…”

Section: Colloidal Parametersmentioning

confidence: 80%

Miniemulsion Polymerization of Styrene Initiated by Tween-surfinit

Capek

2010

Designed Monomers and Polymers

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The sterically-stabilized miniemulsion polymerization of styrene initiated by peroxide-containing Tweens (Tw per , surfinit) was investigated. The conversion curves for miniemulsion emulsion polymerization are concave downward throughout the polymerization and the observed limiting conversions are much below 100% conversion. The polymerization rate vs conversion curve is described by a curve with two rate intervals and rate maximum located at low conversion. The consumption of peroxide groups in Tween (Tw per ), including their immobilization and accumulation into micelles, leads to the dead-end polymerization. The maximal polymerization rate increases with increasing the emulsifier and peroxide concentrations. The particle size decreases and the number of particles increases with increasing the concentration of emulsifier, Tw per and reducing agent. The increased stability of the polymer dispersions is attributed to the chemically bound moieties of Tw per to the particle surface. The values of the ratio of the final number of polymer particles to the initial number of monomer droplets (N p /N d ) favor the mixed mode of particle nucleation.

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Section: Colloidal Parametersmentioning

confidence: 80%

Miniemulsion Polymerization of Styrene Initiated by Tween-surfinit

Capek

2010

Designed Monomers and Polymers

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“…Estos grupos funcionales son localizados generalmente al final de la secuencia hidrofóbica mientras que la estructura hidrofílica es compuesta por poli oxido de etileno. Algunos de los grupos funcionales de mayor uso son del tipo alílico, maléico, metacrílico y vinílico [9][10][11][12][13][14][15][16] . Debido a que los surfactantes polimerizables quedan fijos en las estructura del polímero, no representan ningún riesgo ambiental.…”

Section: Contenidos De Sólidos Y De Monómero Residual De Una Resina Eunclassified

Efecto del Uso de Surfactantes Polimerizables en la Distribución de Tamaño de Partícula, pH, Viscosidad, Contenidos de Sólidos y de Monómero Residual de una Resina Estireno-Butilacrilato

Ríos¹,

Ocampo²,

Franco³

et al. 2013

Polímeros

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Resumen: Se presentan los resultados de la polimerización en emulsión de una resina acrílica estirenada usando surfactantes polimerizables, los cuales presentan ventajas técnicas como baja formación de espuma, alta resistencia de la película al contacto con agua y buena estabilidad en la polimerización. Se evaluó el efecto de estos surfactantes polimerizables en la distribución de tamaños de partícula de la resina; además se determinaron propiedades finales de la resina tales como porcentaje de sólidos, porcentaje de monómero libre, viscosidad y pH. Estos resultados se compararon con los obtenidos usando surfactantes convencionales no polimerizables del tipo alquil fenol etoxilado y alquilarilpoliglicol éter sulfato de sodio. Los resultados indican que que se pueden remplazar totalmente los surfactantes convencionales no polimerizables por los surfactantes poliméricos evaluados sin afectar significativamente las propiedades de la resina, mientras que la sustitución parcial de los surfactantes no polimerizables por los polimerizables induce, en algunos casos, a la formación de partículas con mayor tamaño a las presentes en la muestra estándar. Palabras clave: Polimerización, emulsión, surfactantes polimerizables, resinas. Effect of Polymerizable Surfactants on Particle Size Distribution, pH, Viscosity, Contents of Solids and Residual Monomer of a Styrene-butylacrylate ResinAbstract: Results on the emulsion polymerization of a styrenated acrylic resin using polymerizable surfactants are presented. These surfactants exhibit low foaming, high film strength upon contact with water and good stability in the polymerization. A comparison was made with results for conventional non-polymerizable alkyl aryl polyglycol ether sulphate, sodium salt and nonylphenolethoxylate surfactants. The effect of these polymerizable surfactants on the particle size distribution of the resin was evaluated; in addition to determining the final properties of the resin such as solids content, free monomer content, viscosity and pH. It is feasible to totally replace non-polymerizable surfactants by the polymerizable surfactants evaluated without affecting significantly the properties of the resin, while partial substitution of the non-polymerizable surfactants induces, in some cases, the formation of particles with larger sizes than those in the standard resin. Keywords: Polymerization, emulsion, polymerizable surfactants, resins. IntroducciónEn el campo de los recubrimientos, la tecnología de los polímeros afronta ambiciosos retos para lograr productos con bajos niveles en emisión de compuestos orgánicos volátiles (VOCs), alta durabilidad a la intemperie, rápido curado, buena adhesión a diferentes sustratos y baja sensibilidad a la humedad [1][2][3][4] . Cada vez son más los procesos que se están encaminando a la producción de polímeros en emulsión, en los cuales se busca obtener una dispersión de los monómeros en un liquido inmiscible con ellos, que generalmente es agua. Uno de los polímeros en emulsión más representativo son las resinas acr...

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“…Combination of initiator and surfactant functions in one molecule determines the specific properties of the process of polymer particles formation due to the change of topochemistry and kinetics of water dispersed polymerization. Surface active poly-and oligoperoxides, containing hydrophobic (styrene, vinyl acetate, methyl methacrylate) and hydrophilic (maleic anhydride, acrylic acid, N-vinylpyrrolidone) units, were studied as surface-active initiators of water dispersed polymerization for obtaining of stable water dispersions of particles with narrow size distribution and with desired functionality [14][15][16][17][18][19]. Functionality of obtained particles surface can be regulated by change of the polymer initiator structure.…”

Section: Introductionmentioning

confidence: 99%

Target Synthesis of Functional Biocompatible Nanocomposites with “Core-Shell” Structure

Zaichenko¹,

Mitina²,

Miagkota³

et al. 2018

ChChT

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Abstract.1 Metal-complex macroinitiators were successfully applied for the synthesis of polymer nanocomposites with core-shell structure by two-stage water dispersed polymerization. On the first stage, formation of monodispersed polymer particles of desired size and functionality is achieved by target variation of macroinitiator concentration, content of metal cations in its structure, and pH of medium. Initiation of grafted polymerization from the surface of seeded particles is provided by residual peroxide moieties of macroinitiator.

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Reactive surfactants in emulsion polymerization

Cited by 164 publications

References 37 publications

Miniemulsion Polymerization of Styrene Initiated by Tween-surfinit

Miniemulsion Polymerization of Styrene Initiated by Tween-surfinit

Efecto del Uso de Surfactantes Polimerizables en la Distribución de Tamaño de Partícula, pH, Viscosidad, Contenidos de Sólidos y de Monómero Residual de una Resina Estireno-Butilacrilato

Target Synthesis of Functional Biocompatible Nanocomposites with “Core-Shell” Structure

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