Rheological and electrical properties of carbon black‐based poly(vinylidene fluoride) composites

Abstract

Carbon black (CB)–filled poly(vinylidene fluoride) composites (PCB p ) were prepared by melt compounding. The linear rheology was then studied in detail. The composites show typical solid‐like response in the low‐frequency region, which is attributed to the percolation of CB particles. However, the transient percolated CB network is temperature dependent during the small amplitude oscillatory shear flow. Therefore, the principle of time–temperature superposition is invalid on the dynamic rheological responses of those percolated PCB p . A two‐phase viscoelastic model was then used to further describe the linear responses of PCB p to relate hierarchical structures of CB particles to flow responses of composites. In addition, the electrical and dielectric properties of PCB p were also investigated, aiming at further exploring the percolation behavior of CB. POLYM. ENG. SCI., 53:2541–2548, 2013. © 2013 Society of Plastics Engineers