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Effect of different nanofillers on non-isothermal crystallization kinetics and electric conductivity of dynamically-vulcanized PP-EPDM Blends

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Abstract

In this study, nanofillers composed of hydroxylated carbon nanotubes (h-CNT), carbon nanotubes (CNT) and graphene (GR) were separately added into the dynamically-vulcanized polypropylene (PP)/ethylene-propylenediene monomer (EPDM) blend. Differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD) and electrical resistivity measurements were employed to study the effect of nanofillers on the melt behavior, non-isothermal crystallization behavior and electrical conductivity of the prepared composites. WAXD results showed that h-CNT had a better induction effect of β-PP in the nanocomposites. The sequence of the activity in inducing the formation of β-PP was h-CNT>GR>CNT. However, the total crystallinity of the nanocomposites nearly remained constant. Non-isothermal crystallization kinetic analysis indicated that the presence of nanofillers improved the crystallization rate of the nanocomposites. The consequence of nucleation activity was as follows: CNT>GR>h-CNT. Although EPDM hindered the macromolecular motion of PP, interestingly it could increase the crystallization rate to an extent. Besides, the influence of nanofillers on enhancing the conductive property of the nanocomposites can be ranked as follow: CNT>GR>h-CNT.

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Authors and Affiliations

  1. College of Chemistry & Chemical Engineering, Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei Anhui, 230601, P. R. China

    Bin Yang, Lei Hu, Ru Xia, Fang Chen, Shu-Chun Zhao, Yan-Li Deng, Ming Cao, Jia-Sheng Qian & Peng Chen

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  1. Bin Yang
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  2. Lei Hu
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  3. Ru Xia
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  4. Fang Chen
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  5. Shu-Chun Zhao
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  6. Yan-Li Deng
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  7. Ming Cao
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  8. Jia-Sheng Qian
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  9. Peng Chen
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Correspondence to Bin Yang.

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Yang, B., Hu, L., Xia, R. et al. Effect of different nanofillers on non-isothermal crystallization kinetics and electric conductivity of dynamically-vulcanized PP-EPDM Blends. Macromol. Res. 24, 74–82 (2016). https://doi.org/10.1007/s13233-016-2015-7

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  • DOI: https://doi.org/10.1007/s13233-016-2015-7

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