Polymers Containing Highly Polarizable Conjugated Side Chains as High‐Performance All‐Organic Nanodielectric Materials
2013; Wiley; Volume: 23; Issue: 45 Linguagem: Inglês
10.1002/adfm.201300736
ISSN1616-3028
AutoresYali Qiao, Mohammed Sayful Islam, Kuo Han, Eric E. Leonhardt, Jiuyang Zhang, Qing Wang, Harry J. Ploehn, Chuanbing Tang,
Tópico(s)Ferroelectric and Piezoelectric Materials
ResumoAbstract The discovery of nanodipolar π ‐conjugated oligomer‐containing polymers as high performance nanodielectric materials with high permittivity and low dielectric loss over a wide range of frequency (100 Hz–4 MHz) is reported. Terthiophene‐containing methacrylate polymers are synthesized by reversible addition fragmentation transfer (RAFT) polymerization. Both X‐ray and thermal studies indicate the formation of small crystalline domains of terthiophene side chains dispersed in amorphous matrix. The highly polarizable and fast‐responsive nanodipoles from the nanoscale crystalline domains (<2 nm) are believed to dictate the performance. These polymers uniquely satisfy nanodipole architectures conjectured two decades ago to guide the design of high performance nanodielectric materials. This unprecedented approach can be generalized to a variety of π‐conjugated oligomer‐containing polymers for the development of high energy density capacitor materials.
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