动态硫化制备多壁碳纳米管/热塑性硫化胶复合材料的相态结构及热电效应

doi:10.11896/cldb.19110144

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Abstract MWCNTs/TPV composites were prepared by dynamic vulcanization method, the effect of three different dynamic vulcanization processes and the content of MWCNTs on the phase structure, dielectric properties, thermal conductivity and physical properties of MWCNTs/TPV composites were investigated. The MWCNTs/TPV composites exhibited “island” structure, and the IIR crosslinked particles are dispersed in the PP matrix in a micron state. The dynamic vulcanization process mainly affected the distribution of MWCNTs. The MWCNTs/TPV composites with uniform distribution of MWCNTs in two phases had higher thermo-electric properties. When the MWCNTs content reached the percolation threshold (3wt%), the network structure of MWCNTs was formed, and the AC conductivity, dielectric constant and thermal conductivity of MWCNTs/TPV composites increased sharply. With the increase of MWCNTs, the elastic modulus of MWCNTs/TPV composites increased gradually, and the tensile strength increased first and then decreased. MWCNTs could improve the interfacial adhesion of TPV matrix. Compared with pure TPV, when the content of MWCNTs was 3wt%, the tensile strength of MWCNTs/TPV composites was increased by 39%. Based on the phase structure of MWCNTs/TPV composites and the percolation threshold of MWCNTs, the network structure of MWCNTs was proposed. The MWCNTs mainly overlaped with the MWCNTs at the PP matrix and the interface between the rubber-plastic phase to form a MWCNTs network.

Key words： multi-walled carbon nanotubes (MWCNTs) thermoplastic vulcanizate (TPV) dynamic vulcanization phase structure dielectric properties thermal conductivity

Published: 23 March 2021

CLC number:

TQ334

Fund:Natural Science Foundation of Shandong Province (ZR2016XJ002).

About author:: Qi Tang is a doctor student at Qingdao University of Science and Technology, focuses on the functionalization and modification of thermoplastic vulcanizates.
Chengzhong Zong obtained his doctorate degree in materials science from Beijing University of Chemical Technology in 1999. He is currently a professor at Qingdao University of Science and Technology and a doctoral tutor. He is the dean of the School of Polymer Materials Science and Engineering of Qingdao University of Science and Technology. He has been engaged in the teaching and research and management of polymer materials for a long time. He was named as the academic leader of key positions in the polymer materials discipline of Shandong Pro-vince and a member of the Qingdao Municipal Political Consultative Confe-rence. He presided over the National 863 Program, the National Natural Science Foundation, the Ministry of Education and the Shandong Provincial Project, and the multi-phase of corporate cooperation projects. He has published more than 100 papers in professional journals and academic confe-rences at home and abroad, and applied for more than 20 invention patents.

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	TANG Qi
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Cite this article:

TANG Qi,YAN Tongtong,SUN Hao, et al. Phase Structure and Thermo-electric Effect of Multi-walled Carbon Nanotubes/ Thermoplastic Vulcanizate Composites Prepared by Dynamic Vulcanization[J]. Materials Reports, 2021, 35(6): 6206-6211.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.19110144 OR http://www.mater-rep.com/EN/Y2021/V35/I6/6206

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