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Study on the Effects of Adipic Acid on Properties of Dicyandiamide-Cured Electrically Conductive Adhesive and the Interaction Mechanism

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Abstract

A small quantity of adipic acid was found to improve the performance of dicyandiamide-cured electrically conductive adhesive (ECA) by enhancing its electrical conductivity and mechanical properties. The mechanism of action of the adipic acid and its effects on the ECA were examined. The results indicated that adipic acid replaced the electrically insulating lubricant on the surface of the silver flakes, which significantly improved the electrical conductivity. Specifically, one of the acidic functional groups in adipic acid reacted with the silver flakes, and an amidation reaction occurred between the other acidic functional group in adipic acid and the dicyandiamide, which participated in the curing reaction. Therefore, adipic acid may act as a coupling agent to improve the overall ECA performance.

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Acknowledgements

The research work was supported by Guangdong Province International Cooperation Project No. 2012B050500010 and Guangzhou Municipal Science and Technology and Information Bureau Application Foundation Project No. 12C54011593.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Welding Production Technology, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, 518055, China

    Ling Wang, Hongtao Chen, Xiaojian Liu & Mingyu Li

  2. China National Electric Apparatus Research Institute, Guangzhou, 510300, China

    Ling Wang, Chao Wan & Yonggao Fu

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  1. Ling Wang
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  2. Chao Wan
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  3. Yonggao Fu
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  4. Hongtao Chen
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  5. Xiaojian Liu
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  6. Mingyu Li
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Correspondence to Mingyu Li.

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Wang, L., Wan, C., Fu, Y. et al. Study on the Effects of Adipic Acid on Properties of Dicyandiamide-Cured Electrically Conductive Adhesive and the Interaction Mechanism. J. Electron. Mater. 43, 132–136 (2014). https://doi.org/10.1007/s11664-013-2765-y

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  • DOI: https://doi.org/10.1007/s11664-013-2765-y

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