Abstract
Frontal ring-opening metathesis polymerization was used to in situ prepare polydicyclopentadiene (PDCPD)/carbon nanotubes (CNTs) and PDCPD/CNT-NH2 composites with high glass transition temperature. Compared with PDCPD/CNT composites, PDCPD/CNT-NH2 composites have similar dielectric constants, but their loss tangent significantly reduces. The uniform dispersion of CNT-NH2 leads to the formation of dielectric interfacial polarization. The results of dynamic mechanical analysis (DMA) showed that the glass transition temperature (Tg) of the composites increased with the increase of filler. With the increase of the filler, the elongation at break of the PDCPD/CNT composites decreased, while the elongation at break of PDCPD/CNT-NH2 composites increased, reaching up to 17% because of the stronger interfacial affinity. The PDCPD/CNT-NH2 composites exhibited high dielectric permittivity (47.5 at a frequency of 100 Hz) that originates from the interfacial polarization between PDCPD and CNT-NH2, and the nonconducting –NH2 groups can prevent the conductive path of CNTs and support a low loss tangent (0.096).
Graphical abstract
High Tg PDCPD/CNT-NH2 composite with enhanced dielectric properties was prepared by a simple and quick one-step reaction method of FROMP. Keywords: Polydicyclopentadiene; Composites; Carbon nanotubes; Dielectric properties, Interfacial polarization
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Funding
This research was supported by the National Natural Science Foundation of China (No. 51903002), Natural Science Foundation of Anhui Education Department (Nos. KJ2019A0774, KJ2019JD18), Major Science and Technology Projects of Anhui Province (201903a05020027), Anhui Jianzhu University PhD Startup Fund (2019QDZ22, 2018QD59), University Collaborative Innovation Project of Anhui province (GXXT-2019–017), WuHu Key Technology Major R&D Projects(No. 2020yf14), and Research Fund for Postdoctoral Researchers in Anhui Province (2020B413).
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Wang, P., Yang, L., Gao, S. et al. Enhanced dielectric properties of high glass transition temperature PDCPD/CNT composites by frontal ring-opening metathesis polymerization. Adv Compos Hybrid Mater 4, 639–646 (2021). https://doi.org/10.1007/s42114-021-00287-0
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DOI: https://doi.org/10.1007/s42114-021-00287-0