Synthesis and Characterization of Novel Polyamides Containing Purine Moiety

摘要

A series of new polyamides (inherent viscosities between 0.61 and 1.84dLg(-1)) were prepared directly by low-temperature polycondensation of a new purine-moiety-containing diamines, 7,10-bis(4-aminopheny) adenine, with various acyl dichlorides in N-methyl-2-pyrrolidinone. The resultant polymers showed glass transition temperatures between 312-339 degrees C and 5 weight loss temperatures ranging from 405 to 513 and 378 to 485 degrees C in nitrogen and air atmosphere, respectively. Some polymers were amorphous and could be cast into transparent, light-colored, and flexible films with tensile strengths of 84-110MPa, elongations at break of 8.4-16.5, and tensile modulus of 3.3-5.5GPa.