| abstract |
Aromatic polymers containing aromatic polyamide structural units and aromatic carbohydrazide structural units in specific proportions have high Young's modulus, high elongation at break, and low moisture absorption when formed into films. Aromatic polymers are provided. In addition, a compound having a carbohydrazide structure can be dehydrated and cyclized at low cost under mild conditions by chemically reacting with a chemical selected from acids and bases. |