Zur Initiierung der Emulsionspolymerisation von Vinylchlorid mit Kaliumperoxidisulfat. 4. Zur Herkunft ionischer Gruppen am Emulsionspolyvinylchlorid

Neelsen, J.; Hecht, P.; Jaeger, Werner; Reinisch, G.

doi:10.1002/actp.1987.010381002

Cited by 11 publications

(2 citation statements)

References 17 publications

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“…Neelsen et al 29 claim that the surface ionic groups in PVC latex particles mainly result from covalently bound fragments of the surfactant. In Figure 4 of their paper, relative to a polymerization with SDS at 50 °C, the amount of surfactantderived groups is shown to be 5-7 times higher than the amount of initiator-derived ones.…”

Section: Effects Of Monomer-to-water Ratio and Stirringmentioning

confidence: 99%

Particle Formation in Vinyl Chloride Emulsion Polymerization. Experimental Study

Vale

McKenna

2008

Ind. Eng. Chem. Res.

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Particle formation in vinyl chloride emulsion polymerization has been investigated by means of ab initio and seeded experiments. A series of ab initio polymerizations was run in order to obtain reliable data regarding the dependence of the particle number on the emulsifier (SDS and SDBS) concentration, as well as to analyze the effect of the initiator concentration, stirring rate, and monomer-to-water ratio upon the particle number and the polymerization kinetics. Seeded polymerizations carried out at different concentrations of seed latex and surfactant made it possible to quantitatively evaluate the influence of these factors on the onset and extent of secondary particle formation.

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Section: Effects Of Monomer-to-water Ratio and Stirringmentioning

confidence: 99%

Particle Formation in Vinyl Chloride Emulsion Polymerization. Experimental Study

Vale

McKenna

2008

Ind. Eng. Chem. Res.

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“…Additionally, reaction with water‐soluble impurities, and/or chain transfer to monomer or chain transfer agent (CTA) are sometimes considered. Chain transfer to the surfactant has also been suggested to explain the presence of surfactant fragments in the polymeric chain …”

Section: Fundamental Mechanisms Of Emulsion Polymerizationmentioning

confidence: 99%

Is Modeling the PSD in Emulsion Polymerization a Finished Problem? An Overview

Sheibat‐Othman

Vale

Pohn

et al. 2017

Macro Reaction Engineering

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Significant progress has been made over the past 20–30 years in terms of the ability to develop and solve mechanistic models of emulsion polymerization processes, and in particular models for prediction of the particle size distribution. However, this does not imply that modeling of these economically important processes is by any means a “solved problem,” or that it is no longer necessary to perform fundamental research in this area. There are a number of areas where strong scientific work would increase the understanding of the process, including events in the aqueous phase, radical entry into growing particles, monomer partitioning, and especially the mechanisms and modeling of particle coagulation.

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Polyanion‐polycation‐complex formation of charged microgels and latices with oppositely charged polyelectrolytes in solution

et al. 1992

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Employing cationic, covalently crosslinked polyallylamine-based highly swollen microgels and anionic latices obtained by copolymerization of methacrylic acid and epoxypropyl methacrylate, the interaction of these polymer colloids with oppositely charged linear macroions is investigated by potentiometry, conductometry and turbidimetry. The microgels behave similar to linear macroions in symplex formation, if the components are reacted in the neutralized state, while in a "free acidfree base" titration only the easily accessible sites of the microgels are primarily involved in the interaction. With the more compact polymer latices a stable dispersion is formed, while with the microgels flocculation occurs. The results are discussed with regard to the influence of physical structure of the polymer colloids on stoichiometry and state of dispersion of the symplexes formed. Zur Bildung van Polyanion-Polykation-Komplexen aus geladenen Mikrogelen und Latices mit entgegengesetzt geladenen Polyelektrolyten in LosungUnter Verwendung kationischer covalent vernetzter hoch gequollener Mikrogele auf Polyallylaminbasis und anionischer Latices aus Methacrylsaure-Epoxypropylmethacrylat-Copolymeren wird die Wechselwirkung dieser Polymerkolloide mit entgegengesetzt geladenen Makroionen mittels Potentiometrie, Konduktometrie und Turbidimetrie untersucht. Die Mikrogele verhalten sich bei der Symplexbildung ahnlich wie geloste lineare Polyelektrolyte, wenn beide Titrationskomponenten in neutralisierter Form vorliegen, wahrend bei einer Umsetzung zwischen freier Polysaure und freier Polybase primar nur die leicht zuganglichen Ladungszentren der Mikrogele an der Umsetzung mitwirken. Bei den Latises bildet sich bei der Titration eine stabile "Symplex-Dispersion", wahrend im Falle der Mikrogele Flockung erfolgt. Die Ergebnisse werden hinsichtlich des Einflusses der Zuganglichkeit der Polymerkolloide auf Stochiometrie und Dispersitatszustand der gebildeten Symplexe diskutiert.

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Zur Initiierung der Emulsionspolymerisation von Vinylchlorid mit Kaliumperoxidisulfat. 4. Zur Herkunft ionischer Gruppen am Emulsionspolyvinylchlorid

Cited by 11 publications

References 17 publications

Particle Formation in Vinyl Chloride Emulsion Polymerization. Experimental Study

Particle Formation in Vinyl Chloride Emulsion Polymerization. Experimental Study

Is Modeling the PSD in Emulsion Polymerization a Finished Problem? An Overview

Polyanion‐polycation‐complex formation of charged microgels and latices with oppositely charged polyelectrolytes in solution

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