High-Temperature and High-Energy-Density Dipolar Glass Polymers Based on Sulfonylated Poly(2,6-dimethyl-1,4-phenylene oxide).

A new class of high-temperature dipolar polymers based on sulfonylated poly(2,6-dimethyl-1,4-phenylene oxide) (SO -PPO) was synthesized by post-polymer functionalization. Owing to the efficient rotation of highly polar methylsulfonyl side groups below the glass transition temperature (T ≈220 °C), the dipolar polarization of these SO -PPOs was enhanced, and thus the dielectric constant was high. Consequently, the discharge energy density reached up to 22 J cm .

Achieving high dielectric constant and low loss property in a dipolar glass polymer containing strongly dipolar and small-sized sulfone groups.

In this report, a dipolar glass polymer, poly(2-(methylsulfonyl)ethyl methacrylate) (PMSEMA), was synthesized by free radical polymerization of the corresponding methacrylate monomer. Due to the large dipole moment (4.25 D) and small size of the side-chain sulfone groups, PMSEMA exhibited a strong γ transition at a temperature as low as -110 °C at 1 Hz, about 220 °C below its glass transition temperature around 109 °C.

Poly(-acylethylenimine) copolymers containing pendant pentamethyldisiloxanyl groups. I. Synthesis.

10-(Pentamethyl disiloxanyl) decyl oxazoline () was synthesized. It was copolymerized with either undecyl () or nonyl () oxazolines using methyl 4-nitrobenzenesulfonate as initiator. Two series of random poly(-acylethylenimine) copolymers, and , were synthesized over the whole composition range of monomer with a total degree of polymerization of about 100.