Facile fabrication of polystyrene particles/graphene composites for improved dielectric and thermal properties

• Published in: Designed monomers and polymers Vol. 26; no. 1; pp. 23 - 30
• Main Authors: Deng, Wei, Li, Guoan, Li, Wanyu, Yang, Meng, Cui, Weiwei
• Format: Journal Article
• Language: English
• Published: England Taylor & Francis 2023; Taylor & Francis Ltd; Taylor & Francis Group
• Subjects: breakdown strength; Carbon; Chemical engineering; Dielectric breakdown; Dielectric loss; Dielectric properties; Dielectric strength; Emulsion polymerization; Full Length; Graphene; Hot pressing; Latex; Mechanical properties; Morphology; Particulate composites; Polymers; polystyrene particles; Polystyrene resins; Science; Thermal stability; Thermodynamic properties; thermal stability; Graphene; breakdown strength; polystyrene particles; dielectric properties
• ISSN: 1385-772X; 1568-5551; 1568-5551
• DOI: 10.1080/15685551.2022.2162282

In this paper, polystyrene (PS)-based reduced graphene oxide (rGO) composites were prepared by mixing PS latex particles with graphene oxide (GO) and the following in-situ reduction. The structure and morphology of PS/rGO composites were characterized, and the effects of rGO content on the dielectric properties as well as thermal stability of PS/rGO composites were investigated. Results showed that rGO sheets armoured on the surface of PS particles and exhibited well dispersion in the PS matrix after hot compression. The introduction of rGO improved the dielectric properties of the composites remarkably. When rGO content was 0.12 vol%, the dielectric permittivity and breakdown strength of PS/rGO arrived at 6.3 at10 2 Hz and 107 kV/mm, with 50% and 35.4% enhancement compared to the pristine PS. Furthermore, PS/rGO presented better thermal stability than the pristine PS, but the overlapping of rGO sheets in PS matrix induced the instability of dielectric loss with frequency.