Synthesis and characteristics of novel polyamides having pendent N-phenyl imide groups

We have investigated a novel monomer having a pendent phenyl imide group fo r preparing new cycloaliphatic-aromatic polyamides. Novel polyamides were s ynthesized by a direct polycondensation reaction of N-phenyl-2,3-imide cycl opentane-1,4-dicarboxylic acid (PCPA) and various aromatic diamines. A dire ct polycondensation was carried out by a Yamazaki's direct polycondensation that is typical of using triphenyl phosphite; lithium chloride, and pyridi ne. Inherent viscosity of these resulting polyamides was in the range 0.47- 1.05 dL/g. The glass transition temperatures of these polyamides were in th e range of 190-200 degreesC. The decomposition temperatures of them were in the range of 310-323 degreesC in nitrogen atmosphere. The Solubility of th ese polyamides are good in aprotic solvents such as DMAc (N,N-Dimethylaceta mide), NMP (N-Methyl-2-Pyrrolidinone) and DMF (N,N-Dimethylformamide). Tran sparent, flexible, and tough films were cast from DMAc solutions.