Mechanical, dielectric, and thermal properties of fluorosilicone rubber composites filled with silica/multiwall carbon nanotube hybrid fillers. Issue 48 (9th July 2020)

• Record Type: Journal Article
• Authors: Tan, Changbin; Liu, Guangliang; Yao, Hao; Li, Xiangyang; Li, Gen; Qing, Long; Yang, Yan
• Is Part Of: Journal of applied polymer science. Volume 137:Issue 48(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-07-09
• Subjects: dielectric properties -- mechanical properties -- thermal properties; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.49574
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: In this work, hybrid fillers consist of modified silica (SiO2 ) and multiwalled carbon nanotube (MWCNT) were used to improve the mechanical, dielectric, and thermal properties of fluorosilicone (FSR) composites via a direct mechanical mixing method. With the increase of CNT loading in SiO2 /CNT hybrid loading ratio, the tensile properties, dielectric constant, electrical conductivity, and thermal properties all increase without a sharp sacrifice of flexibility. The dielectric constant of FSR‐S15/C5 achieved 7, 370 @1 kHz, which is about four orders of the FSR‐S20, and the dielectric loss remains as low as 0.676 @1 kHz. Therefore, the linkage of SiO2 and FSR chains not only enhances the interfacial interaction between the fillers and FSR matrix but also decreases the agglomeration of the fillers in matrix. What is more, modified SiO2 and CNT were designed as the effective hybrid filler to improve the performance of the polymeric matrix through synergic effect. Abstract : A strategy of hybrid filler was proposed to prepare fluorosilicone rubber (FSR) composites with simultaneous high dielectric constant, low dielectric loss, excellent mechanical properties, and improved thermal performance without a sharp sacrifice of flexibility. The linkage of the SiO2 and the FSR chains not only improves the interfacial interaction between the fillers and polymer matrix but also decreases the agglomeration of the fillers in the matrix.