Zewang You, Danyi Gao, Ouyue Jin, Xiaohua He and Meiran Xie High dielectric performance of tactic polynorbornene derivatives synthesized by ring-opening metathesis polymerization Journal of Polymer Science Part A: Polymer Chemistry 51
Functional polynorbornenes containing pyrrolidine moiety and bis(trifluoromethyl)biphenyl side group were synthesized by ring-opening metathesis polymerization. Pyrrolidine-contained PTNP and PPNP are supposed to have practically trans double bonds and adopt isotactic syn conformation, whereas dicarboximide type PTNDI has both trans and cis double bonds and atactic microstructure. PTNP possessing a polar 3,5-bis (trifluoromethyl)biphenyl group and the stereoregular chain structure displays a more attractive dielectric constant value (over 20) than those of PTNDI (about 7) and PPNP (only 3).
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