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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Acknowledgements
The authors gratefully acknowledge the financial support of National Natural Science Foundation of China (Grant No. 20734005 and 50973074) and the Program for New Century Excellent Talents in University (NCET-08-0382). We are also heavily indebted to Mr. Zhu Li from Center of Analysis and Test of Sichuan University for careful SEM observation.
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Ke, K., Wen, R., Wang, Y. et al. Crystallization behavior of poly (vinylidene fluoride)/multi-walled carbon nanotubes nanocomposites. J Mater Sci 46, 1542–1550 (2011). https://doi.org/10.1007/s10853-010-4959-5
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DOI: https://doi.org/10.1007/s10853-010-4959-5