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Linear viscoelastic behaviors of polybutene-1 melts with various structure parameters

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Abstract

The effects of weight-average molecular (M w ), molecular weight distribution (MWD), and isotacticity on the linear viscoelastic behavior of polybutene-1 melts are studied. It is observed that the linear viscoelastic region becomes slightly narrower with increasing frequency. In frequency sweeps, the transition of the polymer melts flow from Newtonian flow to power-law flow can be observed. The melts with higher M w and/or broader MWD, as well as higher isotacticity exhibit higher complex viscosity, zero shear viscosity, viscoelasticity moduli, relaxation modulus, broader transition zone, while lower critical shear rate, non-Newtonian index, and the frequency at which elasticity begins to play an important role. The relationship of zero shear viscosity on M w has been established, which agrees with the classical power law. Furthermore, it is found that the cross-over frequency decreases with increasing M w and the cross-over modulus increases with narrowing MWD.

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Authors and Affiliations

  1. Shandong Provincial Key Laboratory of Olefin Catalysis and Polymerization, Key Laboratory of Rubber-Plastics (Ministry of Education), Qingdao University of Science and Technology, Qingdao, 266042, China

    Hua-feng Shao, Shu-lei Wang & Ai-hua He  (贺爱华)

  2. Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Xia Dong

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  1. Hua-feng Shao
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  2. Shu-lei Wang
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  3. Xia Dong
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  4. Ai-hua He  (贺爱华)
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Correspondence to Ai-hua He  (贺爱华).

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Shao, Hf., Wang, Sl., Dong, X. et al. Linear viscoelastic behaviors of polybutene-1 melts with various structure parameters. Chin J Polym Sci 34, 174–184 (2016). https://doi.org/10.1007/s10118-016-1736-1

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  • DOI: https://doi.org/10.1007/s10118-016-1736-1

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