Synthesis and characterization of soluble polyimides from 2,2-bis(4-aminophenyl)cycloalkane derivatives

✍ Scribed by Mi Hie Yi; Wenxi Huang; Bum Jin Lee; Kil-Yeong Choi

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 141 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19990901)37:17<3449::aid-pola2>3.0.co;2-n

✦ Synopsis

New aromatic diamines [(1) and ( 2)] containing polycycloalkane structures between two benzene rings were synthesized by HCl-catalyzed condensation reaction of aniline hydrochloride and corresponding polycycloalkanone derivatives. The structures of diamines were identified by 1 H-NMR, 13 C-NMR, FTIR spectroscopy, and elemental analysis. The polyimides were synthesized from the obtained diamines with various aromatic dianhydrides by one-step polymerization in m-cresol. The inherent viscosities of the resulting polyimides were in the range of 0.34 -1.02 dL/g. The polyimides showed good thermal stabilities and solubility. All the polymers were readily soluble in Nmethyl-2-pyrrolidone, m-cresol, tetrachloroethane, etc. Some of them were soluble even in chloroform at room temperature. The glass transition temperatures were observed in the range of 323-363°C, and all of the polymers were stable up to 400°C under nitrogen atmosphere.