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The cover shows the configuration of the ULTEM thermoplastic polyimide obtained with full atomic molecular dynamics (MD) simulations on a microsecond timescale. The comparative study of the electrostatic interactions' influence on the thermophysical and structural properties of the ULTEM and EXTEM polyimides carried out using MD simulations is reported by Stanislav G. Falkovich, Sergey V. Lyulin, Victor M. Nazarychev, Sergey V. Larin, Andrey A. Gurtovenko, Natalia V. Lukasheva, and Alexey V. Lyulin on page 640 (DOI: 10.1002/polb.23460).