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A qualitative analysis of particle-induced viscosity reduction in polymeric composites

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Abstract

This work proposes a qualitative analysis of the particle-induced viscosity reduction phenomenon observed in polymeric composites like polylactic acid (PLA)/partially methylated silica particles, but not in composites like PLA/hydroxyl-terminated silica particles. The analysis is mainly based on considerations of the friction coefficients of spherical particles in the composites. The analysis reveals that sufficiently small particles, relatively weak polymer–particle interfacial interactions, particle rotation, and the existence of interfacial slipping in a polymeric composite are necessary conditions for the occurrence of particle-induced viscosity reduction, while long-distance particle–particle interactions based on polymer–particle interactions, and possibly existing additional interfacial elastic behaviors conversely lead to an increase in viscosity. The ratio of the radius of the particles to the gyration radius of the coils of polymer chains in polymer melts (R/R g) is found to be not crucial.

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Acknowledgement

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51173130, 21374077, and 51573131) and the China Scholarship Council (CSC).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, People’s Republic of China

    Jingqing Li, Zhihao Li, Yingrui Shang & Shichun Jiang

  2. Sinopec Resin Application Research Institute of Beijing Yansan Co. Ltd., Beijing, 102500, People’s Republic of China

    Hongyuan Chen, Lili Yang & Huiqin Zheng

  3. Department of Chemistry and Bioscience, Aalborg University, 9220, Aalborg, Denmark

    Donghong Yu

  4. Department of Mechanical and Manufacturing Engineering, Aalborg University, 9220, Aalborg, Denmark

    Jesper deClaville Christiansen

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  1. Jingqing Li
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Li, J., Li, Z., Chen, H. et al. A qualitative analysis of particle-induced viscosity reduction in polymeric composites. J Mater Sci 51, 3080–3096 (2016). https://doi.org/10.1007/s10853-015-9618-4

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