Synthesis of Fully Alicyclic Polyimides from 2, 5(6)- Bis(aminomethyl)bicyclo[2.2.1]heptane
2001 年 14 巻 5 号 p. 695-700
詳細
2001 年 14 巻 5 号 p. 695-700
Bicyclo[2.2.1]heptane-2-exo, 3-exo, 5-exo-tricarboxyl-5-endo-acetic dianhydride (4a, BSDA) and its 5-endo-carboxyl-5-exo-acetic isomer (4b) with an alicyclic and spiro structure were prepared from a Diels-Alder adduct of itaconic anhydride with cyclopentadiene via three steps. Fully alicyclic polyimides were synthesized by polycondensations of an alicyclic diamine, 2, 5(6)-bis(aminomethyl)bicyclo[2.2.1]heptane (BBH) with four kinds of cycloaliphatic dianhydrides including BSDA in HMPA. Although inherent viscosities of the poly(amic acid) were somewhat low, the polymer solutions gave the free-standing polyimide films after curing. The films were soluble in organic polar solvents such as DMAc and NMP.
