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Radial structure of commercial styrene-co-butyl acrylate latex particles by means of synchrotron small-angle X-ray scattering under contrast-variation conditions

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Abstract

The structural information of commercial styrene-co-butyl acrylate latex particles along radial direction was observed via the contrast-variation technique using synchrotron small-angle X-ray scattering (SAXS). By manipulating the electron density of the dispersion medium, the microstructural parameters of the latex dispersion were evaluated based on quantitative discussion of the scattering intensity distribution profiles. Four isoscattering points could be identified in the contrast-variation measurements, located at the scattering vectors corresponding to the position of the sharp minima of the scattering curve of homogenous spheres. This suggests that the shape and structure of particles were not affected by adding a certain amount of sucrose and salt. This phenomenon was attributed to the existence of the thin surface layers around particle core in the system. The data indicate that the latex particles exhibit a core–shell structure, and the average thickness of the shell is about 2 nm.

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Acknowledgment

Y. M. thanks National Natural Science Foundation of China (20874101, 50921062) and SSRF project (08SR0011).

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Authors and Affiliations

  1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate University of Chinese Academy of Sciences, Renmin Street 5625, Changchun, 130022, People’s Republic of China

    Xuelian Chen, Jianqi Zhang, Zhiyong Yi, Qiao Wang & Yongfeng Men

  2. Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Zhangheng Road 239, Shanghai, 201203, People’s Republic of China

    Xiuhong Li, Fenggang Bian & Jie Wang

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  1. Xuelian Chen
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  2. Jianqi Zhang
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  3. Zhiyong Yi
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  8. Yongfeng Men
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Correspondence to Yongfeng Men.

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Chen, X., Zhang, J., Yi, Z. et al. Radial structure of commercial styrene-co-butyl acrylate latex particles by means of synchrotron small-angle X-ray scattering under contrast-variation conditions. J Coat Technol Res 8, 489–496 (2011). https://doi.org/10.1007/s11998-010-9314-x

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  • DOI: https://doi.org/10.1007/s11998-010-9314-x

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