Achieving Synergistic Improvement in Dielectric and Energy Storage Properties of All‐Organic Poly(Methyl Methacrylate)‐Based Copolymers Via Establishing Charge Traps

How to achieve synergistic improvement of permittivity (εr) and breakdown strength (Eb) is a huge challenge for polymer dielectrics. Here, the first time, π-conjugated comonomer (MHT) can simultaneously promote εr Eb linear poly(methyl methacrylate) (PMMA) copolymers. The PMMA-based random copolymer films (P(MMA-co-MHT)), block (PMMA-b-PMHT), blend were prepared investigate effects sequential structure, phase separation modification method on dielectric energy storage properties films. As result, P(MMA-co-MHT) maximum 5.8 at 1 kHz owing enhanced orientation polarization electron polarization. Because injection charge transfer are limited by strong electrostatic attraction benzophenanthrene group analyzed density functional theory (DFT), discharge value P(MMA-co-PMHT) containing mol% MHT units with efficiency 80% reaches 15.00 J cm−3 872 MV m−1, which 165% higher than that pure PMMA. This study provides simple effective way fabricate high performance dielectrics via copolymerization monomer P-type semi-conductive polymer.