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Effect of microgel content on the shear and extensional rheology of polyacrylonitrile solution

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Abstract

Crosslinked polyacrylonitrile (cPAN) particles with uniform size were synthesized through precipitation polymerization. The as-formed cPAN nanoparticles were dispersed in polyacrylonitrile (PAN) solutions to form microgels with various contents, which were used as model to study the influence of the microgels on the shear and extensional rheology of PAN solutions. Flow curves of steady shear viscosity displayed shear thinning and followed time–temperature superposition principle. The dependency of activation energy on the content of cPAN microgels indicated that introduction of microgels weakened the temperature sensitivity of PAN solutions. For extensional rheology study, we utilized the capillary thinning rheometry to characterize the elongation relaxation time and apparent extensional viscosity. Study of filament thinning dynamics with a series of system strains confirmed that the higher content of cPAN microgels the lower extensional strength and worse spinnability of the PAN solution.

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Acknowledgments

We are indebted to the National Basic Research Program of China (Grant No. 2011CB605604), the Special Program for Innovation Methods of MOST of China (Grant No. 2011IM030400), and the Knowledge Innovation Project of CAS (Grant No. KJCX2-YW-N39) for the financial support of this work. J. Xu thanks the Taishan Scholar Program for the support of this work.

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Authors and Affiliations

  1. Beijing National Laboratory of Molecular Science, Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China

    Xiaofang Liu, Caizhen Zhu, Haixia Dong, Ruigang Liu, Ning Zhao & Jian Xu

  2. University of the Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Xiaofang Liu

  3. Weihai Tuozhan Fiber Co., Ltd., Weihai, 264202, People’s Republic of China

    Baoming Wang, Shuxiang Li & Jian Xu

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  1. Xiaofang Liu
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  2. Caizhen Zhu
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Correspondence to Jian Xu.

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Liu, X., Zhu, C., Dong, H. et al. Effect of microgel content on the shear and extensional rheology of polyacrylonitrile solution. Colloid Polym Sci 293, 587–596 (2015). https://doi.org/10.1007/s00396-014-3419-1

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  • DOI: https://doi.org/10.1007/s00396-014-3419-1

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