writer：Defeng Wu, Jianghong Wang, Ming Zhang, Weidong Zhou
keywords：poly(vinylidene fluoride), carbon nanotubes, composites, rheology
source：期刊
specific source：Industrial & Engineering Chemistry Research
Issue time：2012年
Ind. Eng. Chem. Res., 2012, 51 (19), pp 6705–6713
ABSTRACT:
The carbon nanotubes (CNTs) filled poly(vinylidene fluoride) (PVDF) composites (PCTs) were prepared by melt compounding for the rheological study. The steady and oscillatory flow behaviors were then explored. The results show that the presence of CNTs enhances the pseudoplastic flow accompanied by the increased flow activation energy. However, the linear flow region is not sensitive to the temperature whether driven by shear rate or by strain. During oscillatory shear flow, the solid-like response is attributed to the percolation of CNTs. But the formation of percolated CNT network is temperature dependent, and the percolation threshold values reduce with increase of temperature. The two-phase viscoelastic model was then used to further describe the linear responses of composites, aiming at relating hierarchical structures of the CNTs to flow behaviors of the composites.
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