Abstract
New polyimides were synthesized by polymerization of pyromeiitic dianhydride and 2-dialkylamino (R2N) - 4, , 6 -bis (p-or m-aminoanilino)1, 3, 5-triazines (R=H, CH3 C2H5, CH2CH2OH, CH2CH2OH5 and CH2CH2CN). The intrinsic viscosity of the polyimides was i n the range 0.18∼0.73 dl/g. The polyimides, which had bis (2-cyanoethyl) amino or bis (2-ethoxyethyl) amino in the 1, , 3, 5-triazine ring, were soluble in acid, aprotic solvents and pyridine. Solubili ty of the polyimide increased with the increasing number of alkyl carbon in the. substituent. When the substituent in the 1, 3, 5-triazine ring had either a lone pair of electrons or no hydrogen participating in hydrogen bonding with other molecules, the polyimide had good solubility.
