Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology, Qingdao 266042, China
zjm@qust.edu.cn
收稿:2020-04-28,
修回:2020-6-4,
录用:2020-6-29,
网络首发:2020-09-01,
纸质出版:2021-01-02
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Chen, L.; Wu, X.; Zhang, X. F.; Zhang, J. M. Enhanced reproducibility of positive temperature coefficient effect of CB/HDPE/PVDF composites with the addition of ionic liquid. Chinese J. Polym. Sci. 2021, 39, 228–236
Long Chen, Xiao Wu, Xiao-Fang Zhang, et al. Enhanced Reproducibility of Positive Temperature Coefficient Effect of CB/HDPE/PVDF Composites with the Addition of Ionic Liquid[J]. Chinese Journal of Polymer Science, 2021, 39(2): 228-236.
Chen, L.; Wu, X.; Zhang, X. F.; Zhang, J. M. Enhanced reproducibility of positive temperature coefficient effect of CB/HDPE/PVDF composites with the addition of ionic liquid. Chinese J. Polym. Sci. 2021, 39, 228–236 DOI: 10.1007/s10118-020-2475-x.
Long Chen, Xiao Wu, Xiao-Fang Zhang, et al. Enhanced Reproducibility of Positive Temperature Coefficient Effect of CB/HDPE/PVDF Composites with the Addition of Ionic Liquid[J]. Chinese Journal of Polymer Science, 2021, 39(2): 228-236. DOI: 10.1007/s10118-020-2475-x.
Developing an effective method for improving the reproducibility of positive temperature coefficient (PTC) effect is of great significance for large-scale application of polymer based PTC composites
owing to its contribution to the security and reliability. Herein
we developed a carbon black (CB)/high density polyethylene (HDPE)/poly(vinylidene fluoride) (PVDF) composite with outstanding PTC reproducibility
by incorporating 1-octyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([OMIm][NTf
2
]) into the composite. After multiple repeated temperature cycles
the PTC performance of as-prepared material keeps almost unchanged and the varition of resistance at room temperature is less than 7%. Our studies revealed that [OMIm]
[NTf
2
] contributes to the improvement of PTC reproducibility in two ways: (i) it acts as an efficient plasticizer for refining the co-continuous phase morphology of HDPE/PVDE blends; (ii) it inhibits the crystallization of PVDF through the dilution effect
leading to more overlaps of the volume shrinkage process of HDPE and PVDF melt which results in the decrease of interface gap between HDPE and PVDF. This study demonstrated that ionic liquids as the multifunctional agents have great potential for improving the reproducibility in the application of the binary polymer based PTC composites.
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