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Preparation and properties of carbon black/polymer composites with segregated and double-percolated network structures

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Abstract

A carbon black (CB)/low-density polyethylene (LDPE)/ultrahigh-molecular-weight polyethylene (UHMWPE) composite with a segregated and double-percolated structure has been fabricated using the solution mixing and high-speed mechanical mixing method. Structural observations show that the conducting CB/LDPE layers were only dispersed at the interface of UHMWPE granules and formed a well-developed CB conductive network with a percolation threshold of 0.26 vol%. The low percolation threshold in CB/LDPE/UHMWPE composites can be explained by the segregated and double-percolated networks of CB within the polymer matrix. A noticeable double positive temperature coefficient of resistivity can be observed around the melting temperature of LDPE and UHMWPE followed by a negative temperature coefficient of resistivity. The microstructure evolution of CB/LDPE/UHMWPE composites can be observed and explained by in situ optical micrographs.

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Acknowledgements

The project was funded by The National Natural Science Founds of China (Contract No. 21176158 and U1162131). We also appreciated the support from Scientific Research Foundation for Returned Scholars, Ministry of Education of China (20111568) and Sichuan Province Science and Technology Support Program (2012RZ0004).

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Authors and Affiliations

  1. State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu, 610065, Sichuan, China

    Yu Bao, Ling Xu, Huan Pang, Ding-Xiang Yan, Wei-Qin Zhang & Zhong-Ming Li

  2. Analytical and Testing Center, Sichuan University, Chengdu, 610065, Sichuan, China

    Chen Chen

  3. College of Chemical Engineering, Sichuan University, Chengdu, 610065, Sichuan, China

    Jian-Hua Tang

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  1. Yu Bao
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  2. Ling Xu
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  3. Huan Pang
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  4. Ding-Xiang Yan
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  5. Chen Chen
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  6. Wei-Qin Zhang
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  7. Jian-Hua Tang
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  8. Zhong-Ming Li
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Correspondence to Chen Chen.

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Bao, Y., Xu, L., Pang, H. et al. Preparation and properties of carbon black/polymer composites with segregated and double-percolated network structures. J Mater Sci 48, 4892–4898 (2013). https://doi.org/10.1007/s10853-013-7269-x

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  • DOI: https://doi.org/10.1007/s10853-013-7269-x

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