ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 37, Number 2
JKCSEZ 37(2)
April 20, 1993 

N-p-nitrophenyl poly(m-phenylene isophthalamide) was obtained from treatment of poly(m-phenylene isophthalamide) with sodium hydride in dimethyl sulfoxide followed by the addition of 1-fluoro-4-nitrobenzene in 43 wt% yield. Its inherent viscosity was 0.606 g/cm·sec determined from a solution of 0.125 g of the above polymer dissolved in 25 ml of 98% sulfuric acid at 30℃. In order to synthesize poly(m-phenylene isophthalamide), 1,3-phenylenediamine is allowed to react with isophthaloyl chloride in chloroform in the presence of triethylamine and added triethylamine hydrochloride. The value of inherent viscosity is 0.560 g/cm·sec measured at the same condition. The substitution ratio of N-p-nitrophenyl poly(m-phenylene isophthalamide) was to be 16.7∼47.0% by using the 1H-NMR integration. When the higher inherent viscosity of poly(m-phenylene isophthalamide) was used, lower substitution ratio would be calculated.