Abstract
A main-chain structured electroactive polyimide (EPI) based on nona-aniline was synthesized via oxidative coupling between p-phenylenediamine (p-PDA) and a monodisperse tetra-aniline precursor. The structure and electrochemical properties of the EPI were studied by FTIR, UV–vis and cyclic voltammetry (CV), respectively. The thermal and anticorrosion properties of the EPI were compared with its penta-aniline analogue. The conductivity of the EPI is 6.27 × 10−5 S･cm−1 which is about ten times higher than that of its penta-aniline analogue. T10% of EPI is 509 °C, significantly higher than those of reported main-chain polyaniline or side-chain polyaniline. Moreover, compared with its penta-aniline analogue, the anti-corrosion protecting efficiency of the EPI is increased by 12%. Results show that conjugated length extension of oligoanilines in a main-chain structured electroactive polymer system can significantly facilitate intra-molecular and inter-molecular charge transporting abilities, and consequently increase the functional efficiency of the materials.
Published Version
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