PREPARATION AND PROPERTIES OF POLYAMIDES AND POLYIMIDES DERIVED FROM 1,3-DIAMINOADAMANTANE

1,3-Diaminoadamantane (I) was used as a monomer with various aromatic dicarboxylic acyl chlorides and dianhydrides to synthesize polyamides and polyimides, respectively. Polyamides having inherent viscosities o f 0.10-0.27 dL/g were prepared by low-temperature solution polycondens ation. The polyamides were soluble in a variety of solvents such as N, N-dimethylformamide (DMF), N,N-dimethylacetamide (DMAc), N-methyl-2-py rrolidone (NMP), pyridine, dioxane, and nitrobenzene. These polyamides had glass transition temperatures in the 179-187 degrees C range and 5% weight loss temperatures occurred at up to 354 degrees C. Polyimide s based on diamine I and various aromatic dianhydrides were synthesize d by the two-stage procedure that included ring-opening to form polyam ic acids, followed by thermal conversion to polyimides. The polyamic a cids had inherent viscosities of 0.14-0.38 dL/g. The glass transition temperature of these polyimides were in the 245-303 degrees C range an d showed almost no weight loss up to 350 degrees C under air and nitro gen atmosphere. (C) 1996 John Wiley & Sons, Inc.