Copoly p-phenylene/3,4 -diphenyl ether

Diaminodiphenyl ether (3,4 ODA), 19 715. See also Copoly(p-phenylene/ 3,4 -diphenyl ether terephthalamide) (ODA/PPTA)... 

The early work by Sweeny, Kwolek, and others demonstrated that progress in this area of technology was the result of a constant trade-off between properties and processability. This is very likely the reason why after half-a-century of research only four compositions have reached commercial stage poly(w-phenylene isophthalamide) (MPDI), PPTA, copoly(p-phenylene/3,4 -diphenyl ether terephthalamide) (ODA/PPTA), poly[5-amino-2-(p-aminophenyl)benzimidazole terephthalamide] (SVM), and its copolymers. 

There is no systematic nomenclature for aromatic polyamides however, several codes can be found in the literature. Poly(m-phenylene isophthalamide) is referred to as MPD-I or MPDI, poly(p-phenylene terephthalamide) is referred to as PPTA or PPD-T, and copoly(p-phenylene/3,4 -diphenyl ether terephthalamide) is referred to as ODA/PPTA or HM-50. Another important polymer, although not... 

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