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Temperature and shear dependence of rheological behavior for thermoplastic polyurethane nanocomposites with carbon nanofillers.

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Title: Temperature and shear dependence of rheological behavior for thermoplastic polyurethane nanocomposites with carbon nanofillers.
Authors: Yu, Li-Min1 (AUTHOR), Huang, Han-Xiong1 (AUTHOR) mmhuang@scut.edu.cn
Source: Polymer. Apr2022, Vol. 247, pN.PAG-N.PAG. 1p.
Subjects: Fourier transform infrared spectroscopy, Nanocomposite materials, Polyurethanes, Polymeric nanocomposites
Abstract: Multi-wall carbon nanotubes (MWCNTs), graphene nanoplates (GNPs), and hybrid fillers (MWCNTs/GNPs) filled thermoplastic polyurethane (TPU) nanocomposites are prepared via melt mixing. The effects of the fillers (contents of 1, 2, and 3 wt%), shear rate, and temperature are investigated on the rheological behavior of the TPU nanocomposites. The results demonstrate that the TPU/MWCNT nanocomposites exhibit stronger polymer-filler and filler-filler interactions than the TPU/GNP and TPU/GNP/MWCNT nanocomposites, and the interactions are destroyed at higher shear rates. Anomalous rheological behavior is found in the nanocomposites with 2 and 3 wt% MWCNTs (2CNT and 3CNT) and 3 wt% MWCNTs/GNPs (3Hybrid). Specifically, as rising the temperature at higher temperatures (180–190 °C), the melt complex viscosities in the low frequency region (<0.4 rad/s) are slightly increased for the 2CNT and 3Hybrid samples, and are more increased over a broader frequency region (<10 rad/s) for the 3CNT sample. The Fourier transform infrared spectroscopy spectra demonstrate that the anomalous rheological behavior is not caused by hydrogen bonding in the TPU nanocomposites. The anomalous rheological behavior is revealed to be attributed to the fact that stronger polymer-filler and filler-filler interactions exist in the 2CNT, 3Hybrid and especially 3CNT samples, and the interactions are strengthened with rising temperature at higher temperatures. [Display omitted] • Effect of different fillers on rheological behavior of TPU nanocomposites was investigated. • Anomalous viscosity increase with rising temperature for TPU nanocomposites was observed. • Mechanism behind anomalous rheological behavior was explored. • Stronger polymer-filler and filler-filler interactions resulted in anomalous rheological behavior. [ABSTRACT FROM AUTHOR]
Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
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  Data: Temperature and shear dependence of rheological behavior for thermoplastic polyurethane nanocomposites with carbon nanofillers.
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  Data: &lt;searchLink fieldCode=&quot;JN&quot; term=&quot;%22Polymer%22&quot;&gt;Polymer&lt;/searchLink&gt;. Apr2022, Vol. 247, pN.PAG-N.PAG. 1p.
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– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Multi-wall carbon nanotubes (MWCNTs), graphene nanoplates (GNPs), and hybrid fillers (MWCNTs/GNPs) filled thermoplastic polyurethane (TPU) nanocomposites are prepared via melt mixing. The effects of the fillers (contents of 1, 2, and 3 wt%), shear rate, and temperature are investigated on the rheological behavior of the TPU nanocomposites. The results demonstrate that the TPU/MWCNT nanocomposites exhibit stronger polymer-filler and filler-filler interactions than the TPU/GNP and TPU/GNP/MWCNT nanocomposites, and the interactions are destroyed at higher shear rates. Anomalous rheological behavior is found in the nanocomposites with 2 and 3 wt% MWCNTs (2CNT and 3CNT) and 3 wt% MWCNTs/GNPs (3Hybrid). Specifically, as rising the temperature at higher temperatures (180–190 &#176;C), the melt complex viscosities in the low frequency region (&lt;0.4 rad/s) are slightly increased for the 2CNT and 3Hybrid samples, and are more increased over a broader frequency region (&lt;10 rad/s) for the 3CNT sample. The Fourier transform infrared spectroscopy spectra demonstrate that the anomalous rheological behavior is not caused by hydrogen bonding in the TPU nanocomposites. The anomalous rheological behavior is revealed to be attributed to the fact that stronger polymer-filler and filler-filler interactions exist in the 2CNT, 3Hybrid and especially 3CNT samples, and the interactions are strengthened with rising temperature at higher temperatures. [Display omitted] • Effect of different fillers on rheological behavior of TPU nanocomposites was investigated. • Anomalous viscosity increase with rising temperature for TPU nanocomposites was observed. • Mechanism behind anomalous rheological behavior was explored. • Stronger polymer-filler and filler-filler interactions resulted in anomalous rheological behavior. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: &lt;i&gt;Copyright of Polymer is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1016/j.polymer.2022.124791
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 1
        StartPage: N.PAG
    Subjects:
      – SubjectFull: Fourier transform infrared spectroscopy
        Type: general
      – SubjectFull: Nanocomposite materials
        Type: general
      – SubjectFull: Polyurethanes
        Type: general
      – SubjectFull: Polymeric nanocomposites
        Type: general
    Titles:
      – TitleFull: Temperature and shear dependence of rheological behavior for thermoplastic polyurethane nanocomposites with carbon nanofillers.
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          Name:
            NameFull: Yu, Li-Min
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            NameFull: Huang, Han-Xiong
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            – D: 28
              M: 04
              Text: Apr2022
              Type: published
              Y: 2022
          Identifiers:
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              Value: 247
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