Crystallization behavior of poly (vinylidene fluoride)/multi-walled carbon nanotubes nanocomposites |
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Authors: | Kai Ke Rui Wen Yu Wang Wei Yang Bang-Hu Xie Ming-Bo Yang |
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Affiliation: | (1) College of Polymer Science and Engineering, Sichuan University, State Key Laboratory of Polymer Materials Engineering, Chengdu, 610065, Sichuan, China; |
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Abstract: | The non-isothermal and isothermal crystallization of poly (vinylidene fluoride) (PVDF)/multiple-walled carbon nanotubes (MWNTs)
composites containing pristine (MWNT1) and carboxyl group (–COOH) functionalized MWNT (MWNT2) were investigated. The effects
of MWNT on the crystallization behavior of PVDF were dependent on the dispersion state of MWNT. Pristine MWNT could increase
the nucleation due to better dispersion, and thus, PVDF/MWNT1 composites exhibited higher crystallization peak temperatures
(T
cps) and crystallinities (X
cs) compared with PVDF/MWNT2 composites. Meanwhile, the formation of MWNT network confined the growth of crystals. For the
isothermal crystallization, MWNT acted as nucleating agents, and the crystallization rate constant k was increased with the addition of MWNT. Besides, the half crystallization time, t
0.5, was remarkably shortened with the increase of MWNT content, especially for the pristine MWNT. |
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Keywords: | |
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