Enhanced dielectric properties of high glass transition temperature PDCPD/BaTiO3 composites by frontal ring-opening metathesis polymerization

• Published in: Materials letters Vol. 310; p. 131492
• Main Authors: Chen, Lang, Wang, Ping, Yang, Li, Ling, Jiacheng, Liu, Chao, Wang, Yi, Zhang, Shousheng, Feng, Shaojie, Wu, Xiusheng, Xu, Pei, Ding, Yunsheng
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.03.2022; Elsevier BV
• Subjects: Barium titanate; Barium titanates; Dielectric properties; Dielectrics; Dynamic mechanical analysis; Glass transition temperature; Interfacical polarization; Leakage current; Materials science; Metathesis; Particulate composites; Polydicyclopentadiene; Polymeric composites; Polymerization; Ring opening; Temperature; Polymeric composites; Interfacical polarization; Dielectrics; Barium titanate; Polydicyclopentadiene
• ISSN: 0167-577X; 1873-4979
• DOI: 10.1016/j.matlet.2021.131492

•PDCPD composites were prepared by FROMP strategy with simple and rapid process.•Tg of PDCPD/BTNA composites was higher than that of PDCPD/BTOH.•PDCPD/BTNA exhibited higher dielectric constant and low loss tangent than PDCPD/BTOH. Polydicyclopentadiene (PDCPD)/hydroxylated barium titanate (BTOH) and PDCPD/norbornene functionalized barium titanate (BTNA) composites have been in situ prepared by frontal ring-opening metathesis polymerization (ROMP). Dynamic mechanical analysis (DMA) results show that the glass transition temperature (Tg) of PDCPD/BTNA composites was higher than that of PDCPD/BTOH, which was mainly due to the enhanced interfacial affinity between BTNA and PDCPD matrix. The PDCPD/BTNA composites exhibited high dielectric constant (20.2 at 100 Hz) due to the interfacial polarization between PDCPD and BTNA, while the non-conductive norbornene groups prevented leakage current generation and supported low loss tangent (0.017).