Structural modification of polyisophthalamides by incorporating dimethylaminoazobenzene pendent groups

✍ Scribed by Constantinos D. Diakoumakos; John A. Mikroyannidis

• Book ID: 101251882
• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 240 KB
• Volume: 64
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970502)64:5<921::aid-app12>3.0.co;2-w

✦ Synopsis

Certain structurally modified polyisophthalamides with bulky azo pendent groups were prepared from the polycondensation of 5-(4-dimethylaminoazobenzene) isophthaloyl chloride with various aromatic diamines. The corresponding unmodified polyisophthalamides were also synthesized to compare their properties. The modified polyisophthalamides showed higher solubility in certain solvents, such as 1,4-dioxane, m-cresol, cyclohexanone, and CCl 3 COOH, than the parent polyamides. The hydrophilicity of the modified polyisophthalamides was estimated by water absorption measurements, and it was found to be significantly higher than that of the corresponding unmodified counterparts. The modified polyisophthalamides were crosslinked upon heat curing, and they were stable up to 340-374ЊC in N 2 or air and afforded anaerobic char yields of 68-72% at 800ЊC.