Syntheses and properties of new poly(amide–imide)s based on 1,4-bis(4-aminophenoxy)naphthalene and various diimide–diacids

✍ Scribed by Jyh-An Chen; Chin-Ping Yang

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 153 KB
• Volume: 77
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(20000705)77:1<217::aid-app28>3.0.co;2-d

✦ Synopsis

A series of new alternative poly(amide-imide)s (PAIs, III a-j ) was synthesized by the direct polycondensation of 1,4-bis(4-aminophenoxy)naphthalene (1,4-BAPON) with various aromatic diimide-diacids. These polymers were obtained in quantitative yields with inherent viscosities of 0.71-1.03 dL/g. Except for III a , most of the polymers were soluble in aprotic polar solvents such as NMP, DMAc, DMF, and DMSO and could be solution-cast into transparent, flexible, and tough films. The glass transition temperatures of these PAIs were in the range of 235-280°C. Thermogravimetric analyses established that these polymers were fairly stable up to 450°C, and 10% weight loss temperatures were recorded in the range of 520 -569°C under nitrogen and 506 -566°C under an air atmosphere. Compared with the PAIs with the 1,4-bis(4aminophenoxy)benzene structure (series IV), the solubility of series III was better than that of series IV. Series III also exhibited lower crystallinity and better processability than those of series IV.