Synthesis and Study of New Poly(ester-imide)s Containing Triptycene Groups

A new triptycene-containing dicarboxylic acid monomer was successfully synthesized by refluxing the diamine, bis(4-aminophenoxy)phenyl triptycene with trimellitic anhydride in glacial acetic anhydride. A series of novel thermally stable poly(ester-imide)s were prepared from dicarboxylic acid, bis(4-trimellitimido phenoxy) phenyl triptycene with various diols by the direct polycondensation. The polymers were obtained in quantitative yields with inherent viscosities of 0.27-0.74 dL g(-1). The resulting polymers dissolved in N-methyl-2-pyrrolidinone, N, N-dimethylacetamide, N, N-dimethylformamide, dimethyl sulfoxide, and pyridine. These polymers were fairly stable up to a temperature >450 degrees C and lost 10% weight in the range of 477 degrees C and 575 degrees C in nitrogen. The UV-V is absorption spectra revealed that most of the polymers had absorption maxima around 310 and 341 nm. (C) 2013 Society of Plastics Engineers