Electrorheological behavior of side-chain polysiloxane containing 3-(4-amidophenyl) sydnone moieties

Authors

  • Hua Yan,

    Corresponding author
    1. Department of Petrochemistry, Logistic Engineering University, Chongqing, People's Republic of China
    • Department of Petrochemistry, Logistic Engineering University, Chongqing, People's Republic of China
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  • Wing Lai Chan,

    1. Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People's Republic of China
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  • Yau Shan Szeto

    1. Institute of Textiles and Clothing, The Hong Kong Polytechnic University, Kowloon, Hong Kong, People's Republic of China
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Abstract

Side-chain polysiloxane containing 3-(4-amidophenyl) sydnone moieties at terminal and aliphatic spacer has been synthesized and its structure was confirmed by FTIR and 1H-NMR. Low mass molar weight sydnone exhibited electrorheological effect, which was enhanced by electron-donor substituted group at phenyl, but weakened by electron-acceptor substituted group. By introducing sydnone into polysiloxane, the polymer displays the higher electrorheological effect due to the increased interaction between sydnone molecules. The oxide states of sydnone affect the electrorheological effect as well as the color of the product. Moreover, the temperature is higher than the glass transfer temperature of the polymer; the electrorheological fluids show a very large leakage current. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 2523–2528, 2004

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