Factors influencing the emulsion polymerization of clay-platelet-assisted styrene–acrylic copolymer latexes / Chandrashekara R. Haramagatti in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 5 (09/2021)  

[article]  inJOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 5 (09/2021) . - p. 1345-1352 Titre : Factors influencing the emulsion polymerization of clay-platelet-assisted styrene–acrylic copolymer latexes Type de document : texte imprimé Auteurs : Chandrashekara R. Haramagatti, Auteur ; Amol T. Naikwadi, Auteur Année de publication : 2021 Article en page(s) : p. 1345-1352 Note générale : Bibliogr. Langues : Américain (ame) Catégories : Argile Caractérisation Copolymère styrène acrylique Emulsions Emulsions -- Stabilité Emulsions pickering Polymérisation en émulsion Revêtements organiques Index. décimale : 667.9 Revêtements et enduits Résumé : Controlling the particle size of solid-particle-stabilized emulsion polymers is a challenge for coating applications where high-solid-content emulsion polymers are required. Clay-particle-stabilized styrene–acrylic copolymer emulsion was prepared by a seeded semibatch emulsion polymerization process. The effect of the concentrations of clay, peptizing agent, and methacrylic acid on the processing, final particle size, and coagulum of the emulsion polymer was studied. Dynamic light scattering (DLS), dynamic mechanical analysis, differential scanning calorimetry, and field-emission-gun scanning electron microscopy techniques were employed to characterize the emulsion polymers. The kinetics of polymerization were monitored based on the percentage solid conversion, and particle size (DLS) analysis suggested a homogeneous coagulative mechanism. The zeta potential of the polymer particles indicated good stability of the emulsion. A stable, coagulum-free, low particle size (~ 300 nm) emulsion was prepared using clay platelets, and the polymer film exhibited improved thermal and mechanical properties that will make this type of emulsion polymer of great use for coating applications. Note de contenu : - Polymerization Process - Characterization : Particle size and zeta potential - Nonvolatile material (NVM) - Electrolytic stability - Freeze–thaw stability - Viscosity - Field-emission-gun scanning electron microscopy (FEGSEM) - Dynamic mechanical analysis (DMA) - Differential scanning calorimetry (DSC) - Table 1 : Effect of KTPP content on the amount of coagulum and final particle size of the emulsions - Table 2 : The effect of the clay particle concentration on the coagulum and final particle size of the emulsion polymer - Table 3 : Effect of amount of seed on final particle size and coagulum with constant amount of Laponite and KTPP. The standard deviation for particle size is ~ 31% - Table 4 : Summary of some properties of surfactant- and Laponite RD-stabilized latex particles. F–T, freeze–thaw stability test DOI : https://doi.org/10.1007/s11998-021-00498-6 En ligne : https://link.springer.com/content/pdf/10.1007/s11998-021-00498-6.pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=36437 [article]

Réservation

Réserver ce document

Exemplaires (1)

Code-barres	Cote	Support	Localisation	Section	Disponibilité
22991	-	Périodique	Bibliothèque principale	Documentaires	Disponible

---

1 (1 - 1 / 1)