Abstract
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.
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References
Gilbert, RG, Emulsion Polymerization: A Mechanistic Approach. Academic Press, London (1995)
Butler, LN, “Effect of Surfactant Systems on the Water Sensitivity of Latex Films.” J. Appl. Polym. Sci., 92 (3) 1813–1823 (2004)
Xu, GH, Dong, J, Severtson, SJ, Houtman, CJ, Gwin, LE, “Modifications of Surfactant Distributions and Surface Morphologies in Latex Films Due to Moisture Exposure.” J. Phys. Chem. B, 113 (30) 10189–10195 (2009)
Shirakbari, N, Ebrahimi, M, Mobarakeh, HS, Khorasani, M, “Effect of Surfactant Type and Concentration on Surfactant Migration, Surface Tension, and Adhesion of Latex Films.” J. Macromol. Sci. Part B, 53 (7) 1286–1292 (2014)
Schmid, S, Scherl, P, Armes, SP, “Synthesis and Characterization of Film-Forming Colloidal Nanocomposite Particles Prepared via Surfactant-Free Aqueous Emulsion Copolymerization.” Macromolecules, 42 (11) 3721–3728 (2009)
Lami, EB, Guimaraes, TR, Pereira, AMC, Alves, GM, Moreira, JC, Putaux, JL, Santos, AM, “High Solids Content, Soap-Free, Film-Forming Latexes Stabilized by Laponite Clay Platelets.” Macromol. Rapid Commun., 31 (21) 1874–1880 (2010)
Amalvy, JI, Percy, MJ, Armes, SP, Wiese, H, “Synthesis and Characterization of Novel Film-Forming Vinyl Polymer/Silica Colloidal Nanocomposites.” Langmuir, 17 (16) 4770–4778 (2001)
Lee, GJ, Son, HA, Cho, JW, Choi, SK, Kim, HT, Kim, JW, “Stabilization of Pickering Emulsions by Generating Complex Colloidal Layers at Liquid-Liquid Interfaces.” J. Colloid. Inter. Sci., 413 100–105 (2014)
Zhang, J, Chen, K, Zhao, H, “PMMA Colloid Particles Armored by Clay Layers with PDMAEMA Polymer Brushes.” J. Polym. Sci. Pol. Chem., 46 (8) 2632–2639 (2008)
Chau, JLH, Hsieh, CC, Lin, YM, Li, AK, “Preparation of Transparent Silica-PMMA Nanocomposite Hard Coatings.” Prog. Org. Coat., 62 (4) 436–439 (2008)
Zhang, K, Wu, W, Meng, H, Guo, K, Chen, J-F, “Pickering Emulsion Polymerization: Preparation of Polystyrene/Nano SiO2 Composite Microspheres with Core-Shell Structure.” Powder Technol., 190 (3) 393–400 (2009)
Colver, PJ, Colard, CAL, Bon, SAF, “Multilayered Nanocomposite Polymer Colloids Using Emulsion Polymerization Stabilized by Solid Particles.” J. Am. Chem. Soc., 130 (50) 16850–16851 (2008)
Kim, YJ, Liu, YD, Seo, Y, Choi, HJ, “Pickering Emulsion Polymerized Polystyrene/Fe2O3 Composite Particles and Their Magneto Responsive Characteristics.” Langmuir, 29 (16) 4959–4965 (2013)
Bon, SAF, Colver, PJ, “Pickering Miniemulsion Polymerization Using Laponite Clay as a Stabilizer.” Langmuir, 23 (16) 8316–8322 (2007)
Ianchis, R, Donescu, D, Petcu, C, Ghiurea, M, Anghel, DF, Stanga, G, Marcu, A, “Surfactant-Free Emulsion Polymerization of Styrene in the Presence of Silylated Montmorillonite.” Appl. Clay Sci., 45 (3) 164–170 (2009)
Herrera, NN, Putaux, J-L, David, L, Haas, FD, Lami, EB, “Polymer/Laponite Composite Latexes: Particle Morphology, Film Microstructure, and Properties.” Macromol. Rapid. Commun., 28 (15) 1567–1573 (2007)
Ortiz, DG, Bohatier, CP, Cambedouzou, J, Bechelany, M, Miele, P, “Current Trends in Pickering Emulsions: Particle Morphology and Applications.” Engineering, 6 (4) 468–482 (2020)
Bao, Y, Zhang, Y, Liu, P, Ma, J, Zhang, W, Liu, C, Simion, D, “Novel Fabrication of Stable Pickering Emulsion and Latex by Hollow Silica Nanoparticles.” J. Colloid. Interface Sci., 553 83–90 (2019)
Delafresnaye, L, Dugas, PY, Lansalot, M, Lami, EB, “Innovative Method for Laponite Encapsulation into Polymer Latex Particles by Clay Cluster-Seeded Emulsion Polymerization.” Macromolecules, 53 (1) 39–50 (2020)
van Herk, AM, “Polymer Encapsulation of Single Clay Platelets by Emulsion Polymerization Approaches, Thermodynamic, and Kinetic Factors.” Macromol. React. Eng., 10 (1) 22–28 (2016)
Othman, NS, Pereira, AMC, Santos, AMD, Lami, EB, “A Kinetic Investigation of Surfactant-Free Emulsion Polymerization of Styrene Using Laponite Clay Platelets as Stabilizers.” J. Polym. Sci. Pol. Chem., 49 (22) 4771–4784 (2011)
Tanriserver, T, Okay, O, Sonmezoclu, IC, “Kinetics of Emulsifier-Free Emulsion Polymerization of Methyl Methacrylate.” J. Appl. Polym. Sci., 61 (3) 485–493 (1996)
van Dobrowolska, ME, Esch, JH, Koper, GJM, “Direct Visualization of “Coagulative Nucleation” in Surfactant-Free Emulsion Polymerization.” Langmuir, 29 (37) 11724–11729 (2013)
Haramagatti, CR, Bhattacharya, S, Sikdar, S, Mallik, BP, “High Solid Content Clay Platelets Stabilized Emulsion Co-polymer and Method of Its Preparation.” Indian Patent, 201721000522 A, 2018
Teixeira, RFA, McKenzie, HS, Boyd, AA, Bon, SAF, “Pickering Emulsion Polymerization Using Laponite Clay as Stabilizer to Prepare Armored “Soft” Polymer Latexes.” Macromolecules, 44 (18) 7415–7422 (2011)
Ma, H, Luo, M, Sanyal, S, Rege, K, Dai, LL, “The One-Step Pickering Emulsion Polymerization Route for Synthesizing Organic-Inorganic Nanocomposite Particles.” Materials, 3 (2) 1186–1202 (2010)
Greesh, N, Hartmann, PC, Sanderson, RD, “The Effect of Clay Loading on the Morphology and Properties of Poly(styrene-co-butyl acrylate)/Clay Nanocomposites.” Macromol. Mater. Eng., 294 (3) 206–212 (2009)
Yilmaz, O, Cheaburu, CN, Durraccio, D, Gulumser, G, Vasile, C, “Preparation of Stable Acrylate/Montmorillonite Nanocomposite Latex via In Situ Batch Emulsion Polymerization: Effect of Clay Types.” App. Clay Sci., 49 (3) 288–297 (2010)
Acknowledgements
The authors thank Asian Paints Ltd. for support to publish this research work. The authors would also like to thank the Analytical Department for timely completion of the characterization of the polymer samples.
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Haramagatti, C.R., Naikwadi, A.T. Factors influencing the emulsion polymerization of clay-platelet-assisted styrene–acrylic copolymer latexes. J Coat Technol Res 18, 1345–1352 (2021). https://doi.org/10.1007/s11998-021-00498-6
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DOI: https://doi.org/10.1007/s11998-021-00498-6