Aliphatic polyhydrazides: A new low temperature solution polymerization

Abstract

Abstract High molecular weight polyhydrazides have been prepared by a new low temperature polymerization technique from equimolar amounts of a dihydrazide and a dicarbonyl chloride in dialkyl amide solvents. All‐aliphatic polyhydrazides were insoluble in dimethyl sulfoxide, had polymer melt temperatures ranging from 200 to 300°C. Films could be pressed and fibers could be pulled from the melt. Aliphatic‐aromatic and oxalic‐aromatic polyhydrazides which undergo dehydration at different rates had polymer melt temperatures ranging from 250 to 300°C. and inherent viscosities ranging from 0.3 to 1.5. They were soluble in dimethyl sulfoxide, a solvent from which tough films could be cast.