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Influence of the association of hydrophobic end groups on the temperature insensitivity of HEUR-thickened latex/Fe2O3/Zn3(PO4)2/BaSO4 suspensions.

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Title: Influence of the association of hydrophobic end groups on the temperature insensitivity of HEUR-thickened latex/Fe2O3/Zn3(PO4)2/BaSO4 suspensions.
Authors: Lin, Yating1 (AUTHOR), Song, Chunmei1 (AUTHOR) cmsong@chem.ecnu.edu.cn, Xiao, Xiong2 (AUTHOR), Wan, Bo2 (AUTHOR)
Source: Journal of Coatings Technology & Research. Mar2023, Vol. 20 Issue 2, p587-601. 15p.
Subjects: Nuclear magnetic resonance spectroscopy, Fourier transform infrared spectroscopy, Gel permeation chromatography, Latex, Hydrophobic surfaces, Acrylic coatings
Abstract: Hydrophobically modified ethoxylated urethane (HEUR) with different structures was synthesized and confirmed by gel permeation chromatography, Fourier transform infrared spectroscopy and nuclear magnetic resonance (1H NMR). We propose the relationship between the temperature insensitivity model and the thickening mechanism of HEUR/latex/Fe2O3/Zn3(PO4)2/BaSO4 suspensions. Meanwhile, the temperature insensitivity of HEUR/C suspensions is the result of two main associations: intermolecular interactions bridging the hydrophobic tails of HEURs and the hydrophobic groups tightly adsorbing onto the latex particle surfaces. A smaller ratio of viscosity (Rv) at 1 s−1 from the steady state condition indicates the better temperature insensitivity of viscosity. The higher degree of crystallinity and rheological activation energy corresponds to a great extent with better temperature insensitivity due to stronger association. The temperature insensitivity is consistent with the longer hydrophobic chain, which was proven by hysteresis tests and oscillatory shear measurements. The storage stability was enhanced in the lockstep with a hydrophobic length of HEUR, which is consistent with the rougher surfaces of HEUR/C films. As an appealing method, the results are meaningful and instructive for coating storage and application. An intermolecular network model of HEUR/C is presented, which suggests intermolecular associations in the bridging of hydrophobic tails and the hydrophobic groups adsorbing onto the latex particle surfaces. A temperature insensitivity mechanism model combined with rheology results and AFM is also proposed to clarify the relationship between temperature insensitivity and storage stability and the hydrophobic tail length. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Coatings Technology & Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: Influence of the association of hydrophobic end groups on the temperature insensitivity of HEUR-thickened latex/Fe<subscript>2</subscript>O<subscript>3</subscript>/Zn<subscript>3</subscript>(PO<subscript>4</subscript>)<subscript>2</subscript>/BaSO<subscript>4</subscript> suspensions.
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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Yating%22">Lin, Yating</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Song%2C+Chunmei%22">Song, Chunmei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> cmsong@chem.ecnu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Xiao%2C+Xiong%22">Xiao, Xiong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wan%2C+Bo%22">Wan, Bo</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Coatings+Technology+%26+Research%22">Journal of Coatings Technology & Research</searchLink>. Mar2023, Vol. 20 Issue 2, p587-601. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Nuclear+magnetic+resonance+spectroscopy%22">Nuclear magnetic resonance spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+infrared+spectroscopy%22">Fourier transform infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Gel+permeation+chromatography%22">Gel permeation chromatography</searchLink><br /><searchLink fieldCode="DE" term="%22Latex%22">Latex</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrophobic+surfaces%22">Hydrophobic surfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Acrylic+coatings%22">Acrylic coatings</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Hydrophobically modified ethoxylated urethane (HEUR) with different structures was synthesized and confirmed by gel permeation chromatography, Fourier transform infrared spectroscopy and nuclear magnetic resonance (1H NMR). We propose the relationship between the temperature insensitivity model and the thickening mechanism of HEUR/latex/Fe2O3/Zn3(PO4)2/BaSO4 suspensions. Meanwhile, the temperature insensitivity of HEUR/C suspensions is the result of two main associations: intermolecular interactions bridging the hydrophobic tails of HEURs and the hydrophobic groups tightly adsorbing onto the latex particle surfaces. A smaller ratio of viscosity (Rv) at 1 s−1 from the steady state condition indicates the better temperature insensitivity of viscosity. The higher degree of crystallinity and rheological activation energy corresponds to a great extent with better temperature insensitivity due to stronger association. The temperature insensitivity is consistent with the longer hydrophobic chain, which was proven by hysteresis tests and oscillatory shear measurements. The storage stability was enhanced in the lockstep with a hydrophobic length of HEUR, which is consistent with the rougher surfaces of HEUR/C films. As an appealing method, the results are meaningful and instructive for coating storage and application. An intermolecular network model of HEUR/C is presented, which suggests intermolecular associations in the bridging of hydrophobic tails and the hydrophobic groups adsorbing onto the latex particle surfaces. A temperature insensitivity mechanism model combined with rheology results and AFM is also proposed to clarify the relationship between temperature insensitivity and storage stability and the hydrophobic tail length. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Coatings Technology & Research is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s11998-022-00692-0
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      – Code: eng
        Text: English
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        Type: general
      – SubjectFull: Fourier transform infrared spectroscopy
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      – SubjectFull: Gel permeation chromatography
        Type: general
      – SubjectFull: Latex
        Type: general
      – SubjectFull: Hydrophobic surfaces
        Type: general
      – SubjectFull: Acrylic coatings
        Type: general
    Titles:
      – TitleFull: Influence of the association of hydrophobic end groups on the temperature insensitivity of HEUR-thickened latex/Fe2O3/Zn3(PO4)2/BaSO4 suspensions.
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            NameFull: Lin, Yating
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            NameFull: Song, Chunmei
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            NameFull: Xiao, Xiong
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            NameFull: Wan, Bo
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            – D: 01
              M: 03
              Text: Mar2023
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              Y: 2023
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