Preparation and characterization of aqueous dispersions of poly(3,4-ethylenedithiathiophene-co-3,4-ethylenedioxythiophene)/ poly(styrene sulfonate) and their conducting films

Authors

  • Shuai Chen,

    1. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi Province, China
    2. School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
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  • Baoyang Lu,

    1. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi Province, China
    2. School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
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  • Jingkun Xu,

    Corresponding author
    1. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi Province, China
    • Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi Province, China
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  • Leiqiang Qin,

    1. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi Province, China
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  • Zhipeng Wang,

    1. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi Province, China
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  • Xuemin Duan

    1. School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, China
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Abstract

The chemical oxidative copolymerization of 3,4-ethylenedithiathiophene (EDTT) with 3,4-ethylenedioxythiophene (EDOT) and 2′-hydroxymethyl-3,4-ethylenedioxythiophene in a poly(styrene sulfonic acid) aqueous solution was successfully carried out to form stable, dark blue colloidal dispersions in water. Coating these dispersions onto polypropylene substrates led to the formation of free-standing copolymer films. The mechanical, electrical, and thermoelectrical properties of these films were investigated; the films showed superior properties in comparison with those of poly(3,4-ethylenedithiathiophene) (PEDTT)/poly(styrene sulfonate) (PSS). The copolymer film based on EDTT and EDOT achieved a high electrical conductivity (8.2 × 10−2 S cm−1) at 298 K; this could be improved about 10 times through the addition of dimethyl sulfoxide (DMSO) or DMSO/isopropyl alcohol into the polymer dispersion with almost constant Seebeck coefficients of about 9 μV K−1. On the contrary, these additives had almost no effect on the conductivity of PEDTT/PSS. The structure and morphology of the polymer films were studied by X-ray diffraction and SEM analyses. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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