Preparation and properties of polyamides and polyimides derived from 1,3-diaminoadamantane

✍ Scribed by Yaw-Terng Chern; Wan-Ho Chung

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 555 KB
• Volume: 34
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19960115)34:1<117::aid-pola12>3.0.co;2-o

✦ Synopsis

SYNOPSIS

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 of 0.10-0.27 dL/g were prepared by low-temperature solution polycondensation. The polyamides were soluble in a variety of solvents such as N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMAc), N-methyl-2-pyrrolidone (NMP), pyridine, dioxane, and nitrobenzene. These polyamides had glass transition temperatures in the 179-187OC range and 5% weight loss temperatures occurred at up to 354°C. Polyimides based on diamine I and various aromatic dianhydrides were synthesized by the two-stage procedure that included ring-opening to form polyamic acids, followed by thermal conversion to polyimides. The polyamic acids had inherent viscosities of 0.14-0.38 dL/g. The glass transition temperature of these polyimides were in the 245-303°C range and showed almost no weight loss up to 350°C under air and nitrogen atmosphere. 0 1996