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Characterization of elongation viscosity for polyethylene melts

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Abstract

Elongation viscosity is an important characterization of flow properties for polymer melts. In the present article, a new extensional viscosity equation for polymer melts was established by introducing a relaxation time equation based on the Cross model. The elongation viscosities of a low-density polyethylene (LDPE) melt at 200 °C and a metallocene linear low-density polyethylene (mLLDPE) melt at 130 °C were estimated using this equation; then, the calculations of the melt elongation viscosity were compared with the measured data from the extension experiments of the LDPE melt and the mLLDPE melt reported in the reference. Good agreement was found between the predictions and the measured data from the LDPE and mLLDPE melts. In addition, this equation is easy to use for characterization of elongation viscosity during single shaft elongation flow for polymer melts.

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Acknowledgments

The authors would like to thank the Science Foundation of Guangxi University for Nationalities (no. 2010QD021) for the support.

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Authors and Affiliations

  1. School of Mechanical and Automobile Engineering, South China University of Technology, Guangzhou, 510640, People’s Republic of China

    Ji-Zhao Liang

  2. School of Chemistry and Chemical Engineering, Key Laboratory of Chemical and Biological Transforming Process, University of Guangxi, Guangxi University for Nationalities, Nanning, 530006, People’s Republic of China

    Lei Zhong

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  1. Ji-Zhao Liang
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  2. Lei Zhong
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Correspondence to Ji-Zhao Liang.

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Liang, JZ., Zhong, L. Characterization of elongation viscosity for polyethylene melts. Colloid Polym Sci 291, 1595–1599 (2013). https://doi.org/10.1007/s00396-013-2893-1

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  • DOI: https://doi.org/10.1007/s00396-013-2893-1

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