CHLORINATION AND OXIDATION OF AROMATIC POLYAMIDES .2. CHLORINATION OFSOME AROMATIC POLYAMIDES

The effects of chlorine on three kinds of aromatic polyamides: those n ot containing a substituent, those containing substituents, and those containing heterocyclic aromatic rings, were studied. The correlations between the chemical structures of polyamides and the reactivity to h ypochlorous acid were examined by IR and C-13 solid-state NMR spectra before and after chlorination. It was found that the chlorination of p olyamides depends not only on their chemical structures but also on ch lorination conditions such as pH value and reaction time. Their respon se to chlorination corresponds to four types: ring-chlorination, no re action, N-chlorination, and chain cleavage. (C) 1996 John Wiley & Sons , Inc.