High molecular weight block copolyamides useful in the production of fibers of high strength and modulus, having the following formula: ##STR1## wherein X is --CH.sub.2 --.sub.m, wherein m is 0 to 12, ##STR2## wherein Z is C(CH.sub.3).sub.2, zero, oxygen or SO.sub.2, are prepared from N,N'-bis(4-aminophenyl) terephthalamide having the formula: ##STR3## which is itself prepared by condensing aniline with dimethyl terephthalate or terephthalic acid, nitrating the product produced thereby and finally hydrogenating the resultant compound.
高分子量嵌段共聚酰胺可用于生产高强度和模量的纤维,其
化学式如下:##STR1## 其中X为--CH.sub.2 --.sub.m,其中m为0至12,##STR2##其中Z为C(CH.sub.3).sub.2,零,氧或SO.sub.2,是由具有以下
化学式的N,N'-双(4-
氨基苯基)对苯二甲酰胺制备的:##STR3##该化合物本身是由
苯胺与
对苯二甲酸二甲酯或
对苯二甲酸缩合而成,然后对所得产物进行硝化,最后加氢得到。