Polyitaconates: A New Family of “All-Polymer” Dielectrics

• Published in: ACS applied materials & interfaces Vol. 10; no. 44; pp. 38476 - 38492
• Main Authors: Bonardd, Sebastian, Alegria, Angel, Saldias, Cesar, Leiva, Angel, Kortaberria, Galder
• Format: Journal Article
• Language: English
• Published: United States American Chemical Society 07.11.2018
• Subjects: polymethacrylates; energy storage; dipolar glass polymer; polymer dielectrics; polyitaconates; dielectric constant; broad band dielectric spectroscopy
• ISSN: 1944-8244; 1944-8252
• DOI: 10.1021/acsami.8b14636

This work presents the synthesis of new poly­(itaconate)­s containing sulfone or nitrile pendant groups through conventional radical polymerization together with their characterization and comparison with poly­(methacrylate)­s containing identical groups. Structural and thermal characterization has been carried out in terms of Fourier transform infrared spectroscopy, differential scanning calorimetry, nuclear magnetic resonance, and thermogravimetric analysis. Characterized by broad band dielectric spectroscopy (BDS), all polymers showed dielectric constant values between 7 and 10 (at 25 °C and 1 kHz) and relative low dielectric loss values (≈0.02). BDS measurements showed, for all the polymers analyzed, notorious subglass transitions even at temperatures below −100 °C, resulting in a broad temperature interval in which these polymers exhibit high dielectric constant and could work without high losses. Therefore, these materials seem to be good candidates for dielectric applications such as energy storage, among others.