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On the stratification mechanism of self-stratifying epoxy–acrylic coatings

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Abstract

To shed light on the self-stratification mechanism in epoxy–acrylic coatings, 200-, 400-, and 800-micron-thick coatings were applied on glass and aluminum substrates, and their solidification behavior was studied. Some of the applied coats showed self-stratification behavior, with the thermoplastic acrylic copolymer in the top layer. In addition, experiments were performed on epoxy–acrylic solutions without hardeners to evaluate the resulting convective patterns on the solution surface, which exhibited finger-type convection. The final structure of the films had an apparent dependency on the thickness. Thicker films were usually more stratified and had a thicker stratified layer. As these observations could not support diffusion as the primary mechanism of self-stratification, convection experiments were done on epoxy and coatings solutions. The surface patterns on the solutions were studied, and the finger-type convection was observed. Based on these observations, we propose that convection may be the primary movement mechanism rather the diffusion of polymers toward the surface in the self-stratifying coats.

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References

  1. Verkholantsev, V, “Self-Stratifying Coatings.” ECJ, 12 707–712 (2000)

    Google Scholar 

  2. Waldbrige, DJ, “Self Stratifying Coating—An Overview of a European Community Research Project.” Prog. Org. Coat., 28 155–159 (1996)

    Article  Google Scholar 

  3. Beaugendre, A, Degoutin, S, Bellayer, S, Pierlot, C, Duquesne, S, Casetta, M, et al., “Self-Stratifying Coatings: A Review.” Prog. Org. Coat., 110 210–241 (2017)

    Article  CAS  Google Scholar 

  4. Benjamin, S, Carr, C, Waldbridge, DJ, “Self Stratify Coating for Metallic Substrates.” Prog. Org. Coat., 28 197–207 (1996)

    Article  CAS  Google Scholar 

  5. Funke, W. Book Review: X. FATIPEC-Kongressbuch (10th FATIPEC Congress Report). 1970. Edited by the Scientific Committee of the 10th FATIPEC Congress. Angewandte Chemie International Edition in English. 1971;10(3):205–205.

  6. Verkholantsev, V, “Nonhomogeneous-In-Layer Coatings.” Prog. Org. Coat., 13 (2) 71–96 (1985)

    Article  CAS  Google Scholar 

  7. Zroll, VU, "Bildung von mehrschichten-lackirungen bei einmaligem Materialauftrag." Farbe+Lack, 11 801–803 (1989)

    Google Scholar 

  8. Toussaint, A, “Self-Stratifying Coatings for Plastic Substrates.” Prog. Org. Coat., 28 183–195 (1996)

    Article  CAS  Google Scholar 

  9. Verkholantsev, V, “Heterophase and Self-Stratifying Polymer Coatings.” Progr. Org. Coat., 26 (1) 31–52 (1995)

    Article  CAS  Google Scholar 

  10. Carr, C, Benjamin, S, Walbridge, DJ, “Fluorinated Resins in Self-Stratifying Coatings.” ECJ, 4 262–266 (1995)

    Google Scholar 

  11. Beaugendre, A, Degoutin, S, Bellayer, S, Pierlot, C, Duquesne, S, Casetta, M, Jimenez, M, “Self-Stratifying Epoxy/Silicone Coatings.” Prog. Org. Coat., 103 101–110 (2017)

    Article  CAS  Google Scholar 

  12. Misev, TA, “Thermodynamic Analysis of Phase Separation in Self-Stratify Coatings: Solubility Parameters Approach.” J. Coat. Technol., 63 (795) 23–28 (1991)

    Google Scholar 

  13. Funke, W, “Preparation and Properties of Paint Films with Special Morphological Structure.” J. Oil Colour Chem. Assoc., 59 398–403 (1976)

    CAS  Google Scholar 

  14. Murase, H., Funke, W. "Formation of Two-Phase Coatings from a Mixture of Powdered Polymers." In Congress Book, XVth FATIPEC Congress, 8–13 June 1980, Amsterdam: 3E-Activities; Netherlands Association of Coatings Technologists NVVT, Amsterdam, The Netherlands, 1980; Vol. 2, pp. 387–409.

  15. Verkholantsev, V, “Coatings Based on Polymer-Polymer Composites.” Prog. Org. Coat., 18 43–77 (1990)

    Article  CAS  Google Scholar 

  16. Verkholantsev, V, “Coatings Based on Polymer/Polymer Composites.” J. Coat. Technol., 64 (809) 51–59 (1992)

    CAS  Google Scholar 

  17. Carr, C, “Multilayered Paint Films From Single Coat Systems.” J. Oil Colour Chem Assoc., 10 403–404 (1990)

    Google Scholar 

  18. Carr, C, Wallstom, E, “Theoretical Aspects of Self-Stratification.” Prog. Org. Coat., 28 161–171 (1996)

    Article  CAS  Google Scholar 

  19. Abbasian, A, Ekbatani, S, “Resin Migration Tracking Via Real-Time Monitoring FTIR- ATR in a Self-Stratifying System.” Progr. Org. Coat., 131 159–164 (2019)

    Article  CAS  Google Scholar 

  20. Toussaint, G, Bodiguel, H, Allain, C, “Experimental Characterization of Buoyancy- and Surface Tension-Driven Convection During the Drying of a Polymer Solution.” Int. J. Heat Mass Transf., 51 4228–4237 (2008)

    Article  CAS  Google Scholar 

  21. Wimmer, M., Koschmieder, E. L., Bénard Cells and Taylor Vortices. Cambridge etc., Cambridge University Press 1993. X, 337 pp., & 35.00. ISBN 0-521-40204-2 (Cambridge Monographs on Mechanics and Applied Mathematics). ZAMM J. Appl. Math. Mech./Zeitschrift für Angewandte Mathematik und Mechanik. 1994;74(10):458–458.

  22. Rayleigh, L, “On the Convective Currents in a Horizontal Layer of Fluid when the Higher Temperature Is on the Under Side.” Philos. Mag., 32 (192) 529–546 (1916)

    Article  Google Scholar 

  23. Pearson, JRA, “On Convection Cells Induced by Surface Tension.” J. Fluid Mech., 4 489–500 (1958)

    Article  Google Scholar 

  24. Gambale, F, Gliozzi, A, “Formation of Dynamic Patterns in a Fluid Layer.” J. Phys. Chem., 76 783–790 (1972)

    Article  CAS  Google Scholar 

  25. Weh, L, “Self-Organized Structures at the Surface of Thin Polymer Films.” Mat. Sci. Eng. C, 8–9 463–467 (1999)

    Article  Google Scholar 

  26. Zhang, N, Chao, DF, “Mechanisms of Convection Instability in Thin Liquid Layers Induced by Evaporation.” Int. Commun. Heat Mass Transf., 26 1069–1080 (1999)

    Article  CAS  Google Scholar 

  27. Bestehorn, M, “Convection in Thick and in Thin Fluid Layers with a Free Surface—The Influence of Evaporation.” Eur. Phys. J. Spec. Top., 146 (1) 391–405 (2007)

    Article  Google Scholar 

  28. Li, M, Xu, S, Kumacheva, E, “Convection in Polymeric Fluids Subjected to Vertical Temperature Gradients.” Macromolecules, 33 4972–4978 (2000)

    Article  CAS  Google Scholar 

  29. Shklyaev, S, Nepomnyashchy, A, Oron, A, “Marangoni Convection in a Binary Liquid Layer with Soret Effect at Small Lewis Number: Linear Stability Analysis.” Phys. Fluids, 21 (5) 054101 (2009)

    Article  Google Scholar 

  30. Dutton, T, Pate, L, Hollingsworth, D, “Imaging of Surface-Tension-Driven Convection Using Liquid Crystal Thermography.” J. Heat Transf., 132 (12) 121601 (2010)

    Article  Google Scholar 

  31. Yiantsios, SG, Serpetsi, SK, Doumenc, F, Guerrier, B, “Surface Deformation and Film Corrugation During Drying of Polymer Solutions Induced by Marangoni Phenomena.” Heat Mass Transf., 89 1083–1094 (2015)

    Article  CAS  Google Scholar 

  32. Doumenca, F, Chénier, E, Trouette, B, Boeckd, T, Delcarte, C, Guerriera, B, Rossie, M, “Free Convection in Drying Binary Mixtures: Concentration Versus Thermal Instabilities.” Int. J. Heat Mass Transf., 63 336–350 (2013)

    Article  Google Scholar 

  33. Davis, SH, Müller, U, Dietssche, C, "Pattern Selection in Single-Component Systems Coupling Benard Convection and Solidification." J. Fluid Mech., 144 133–151 (1984)

    Article  Google Scholar 

  34. Abbasian, A, Ghaffarian, R, Mohammadi, N, “Investigation of Factors Affecting Stratification Phenomenon in Epoxy-acrylic Coatings.” Iran. Polym. J., 13 (1) 61–68 (2004)

    CAS  Google Scholar 

  35. Kavehpour, P, Ovryn, B, McKinley, G, “Evaporatively-Driven Marangoni Instabilities of Volatile Liquid Films Spreading on Thermally Conductive Substrates.” Colloids Surf. A Physicochem. Eng. Asp., 206 (1–3) 409–423 (2002)

    Article  CAS  Google Scholar 

  36. Pauchard, L, Allain, C, “Buckling Instability Induced by Polymer Solution Drying.” Europhys. Lett., 62 (6) 897–903 (2003)

    Article  CAS  Google Scholar 

  37. Sakurai, S, Furukawa, C, Okutsu, A, Miyoshi, A, Nomura, S, “Control of Mesh Pattern of Surface Corrugation Via Rate of Solvent Evaporation in Solution Casting of Polymer Film in the Presence of Convection.” Polymer, 43 3359–3364 (2002)

    Article  CAS  Google Scholar 

  38. Trouette, B, “Transient Rayleigh–Bénard–Marangoni Solutal Convection.” Phys. Fluids, 24 074108 (2012)

    Article  Google Scholar 

  39. de Gennes, PG, “Instabilities During the Evaporation of a Film: Non-Glassy Polymer+ Volatile Solvent.” Eur. Phys. J. E, 6 421–424 (2001)

    Article  Google Scholar 

  40. Bassou, N, “Role of Benard–Marangoni Instabilities During Solvent Evaporation in Polymer Surface Corrugations.” Langmuir, 25 624–632 (2009)

    Article  CAS  Google Scholar 

  41. Bormashenko, E, "On the Mechanism of Patterning in Rapidly Evaporated Polymer Solutions: Is Temperature-Gradient-Driven Marangoni Instability Responsible for the Large-Scale Patterning." J. Colloid Interface Sci., 343 602–607 (2010)

    Article  CAS  Google Scholar 

  42. Bormashenko, E, “Mesoscopic Patterning in Evaporated Polymer Solutions: Poly (Ethylene Glycol) and Room‐Temperature‐Vulcanized Polyorganosilanes/‐siloxanes Promote Formation of Honeycomb Structures.” Macromol. Chem. Phys, 209 567–576 (2008)

    Article  CAS  Google Scholar 

  43. Saranjam, N, Chandra, S, Mostaghimi, J, “Orange Peel Formation due to Surface Tension-Driven Flows within Drying Paint Films.” J. Coat. Technol. Res., 13 (3) 413–426 (2016)

    Article  CAS  Google Scholar 

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Acknowledgment

We express gratitude Roehm Company for supplying Acrylic resins and related information for this research.

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  1. Department of Polymer Engineering, Islamic Azad University, Science and Research Branch, Tehran, Iran

    Ali Abbasian, S. Ekbatani & N. Bagherzadeh

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  1. Ali Abbasian
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  2. S. Ekbatani
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  3. N. Bagherzadeh
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Correspondence to Ali Abbasian.

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Abbasian, A., Ekbatani, S. & Bagherzadeh, N. On the stratification mechanism of self-stratifying epoxy–acrylic coatings. J Coat Technol Res 18, 559–568 (2021). https://doi.org/10.1007/s11998-020-00424-2

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  • DOI: https://doi.org/10.1007/s11998-020-00424-2

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