an important quality in capacitors. The combination of a high dielectric constant
(ε ~3), relatively high breakdown strength (645 MV/m), and low energy loss in the
x-PP-3 dielectric film offers a reliable energy density >5 J/cm
3 , which is significantly higher than the 2–3 J/cm
3 typically shown in BOPP capacitors.
Fig. 20 (Top) D–E loops and (bottom) energy density for (a) PP and three PP–OH copolymers
containing (b) 0.7, (c) 1.8, and (d) 4.2 mol% OH content under various applied electric fields
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