To amides directly

Other Modifications of Polymer Structure. In order to more fully determine the effects of structural change upon polyamide OPV, several other modifications of the basic aliphatic-aromatic backbone were performed. One simple modification is to reverse the direction of the amide linkage. The data in Table II indicate that for at least the shorter chain polyisophthalamides, amide reversal has no measurable effect upon the OPV at either 0% or 80% RH. It is surprising to note that the amide direction does not seem to affect either density or Tg in addition to OPV. Furthermore, Morgan and Kwolek reported that the amide direction had little, if any, effect upon the melting points on aliphatic terephthalamides and their analogs (21). It is due to the indifference of polyamide properties to amide direction that data for MPD-14 is included in Figures 3 and 5. 

Amides. The reduction of nitro compounds in the presence of acid chlorides leads to amides directly. 

---