Modified polyisophthalamides bearing furamido pendant groups

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

• Book ID: 103075016
• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 555 KB
• Volume: 31
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(95)00022-4

✦ Synopsis

A new series of modified polyisophthalamides containing pendant furamido groups was prepared from S-(furamido)isophthalic acid and various aromatic diamines by the phosphorylation method. The chemical, physical and thermal properties of these polyamides were compared to those of the analogous unmodified ones. The modified polyamides exhibited better solubility in certain solvents such as m-cresol, cyclohexanone and trichloroacetic acid than their unmodified counterparts.

In addition, the incorporation of the pendant furamido groups in the polyisophthalamide backbone brought about some substantial increase of the thermal stability as measured by TGA and isothermal gravimetric analysis. The crosslinked modified polyamides obtained upon curing at 300°C for 20 hr were stable up to 321-340°C in N? or air and afforded anaerobic char yields of 6147% at 800°C. Water absorption and X-ray measurements were also performed

'kZhar yield at 800°C.