Aromatic polymer, film, electrolyte membrane and separator
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United States of America Patent
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Mar 31, 2009
Grant Date -
Sep 14, 2006
app pub date -
Mar 2, 2004
filing date -
Mar 5, 2003
priority date (Note) -
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Abstract
An aromatic polymer containing aromatic polyamide structural units and aromatic carbohydrazide structural units at a specific ratio is disclosed. A film having a high Young's modulus, high elongation at break and low moisture absorption can be formed from such an aromatic polymer. Dehydration cyclization of a compound having a carbohydrazide structure can be conducted under mild conditions at low cost by causing the chemical reaction using a chemical which is selected from the acids and bases.
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