Synthesis of semiaromatic polyimides from aromatic diamines containing adamantyl units and alicyclic dianhydrides

We prepared new semiaromatic polyimides from alicyclic dianhydrides and aromatic diamines containing adamantyl and biadamantyl units. Polycondensations were performed in 1-methyl-2-pyrrolidinone at room temperature for 7 h and then 80 degreesC for 23 h, giving poly(amic acid)s with inherent viscosities up to 0.58 dL/g. Poly(amic acid)s were converted to corresponding poly(imide)s by thermal treatment. Poly(imide)s showed relatively high thermal stability (5% weight loss around 450 degreesC) and low dielectric constants (2.69-2.79). (C) 2003 Wiley Periodicals, Inc.