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pH and organic solvent-sensitive properties of crosslinked polymeric spheres formed by a soap-free emulsion polymerization

Authors

  • Congcong Shi,

    1. Department of Polymer Science and Engineering, School of Material Science and Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, China
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  • Xi Chen,

    Corresponding author
    1. Department of Polymer Science and Engineering, School of Material Science and Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, China
    • School of Material Science and Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, China
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  • Lu Chen,

    1. Department of Polymer Science and Engineering, School of Material Science and Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, China
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  • Mingxing Chen,

    1. Department of Polymer Science and Engineering, School of Material Science and Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, China
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  • Ran Jiang

    1. Department of Polymer Science and Engineering, School of Material Science and Engineering, Tianjin Polytechnic University, State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University, Tianjin 300160, China
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Abstract

Narrowly distributed poly (styrene-co-(4-vinylpyridine)) microspheres are facilely prepared by a soap-free emulsion polymerization, and their structures and properties are investigated by TEM, FTIR spectra, DSC, and DLS, respectively. The sizes and glass transition temperatures of the polymeric spheres increase with an increase of 4-vinylpyridine in the reactive system. In addition, these polymeric spheres show good stability in water and a series of organic solvents due to their crosslinked structures. When poly(styrene-co-(4-vinylpyridine)) microspheres are obtained in the reactive system where the weight ratio of 4-vinyl pyridine to styrene is less than 4/6, they can be well dispersed in water as well as in organic solvents such as ethanol, toluene and DMF, and show obvious pH sensitive and organic solvent-sensitive characteristics. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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