| 摘要 |
Described in this invention is an aromatic polyamide of structural formula (I) for preparing an optical anisotropic dope under the conditions of less activity than sulfuric acid, less environmental contamination and easiness in process control, wherein R represents an aromatic group such as (a), (b) or (c) having a nitrile group substituted on the aromatic nucleus of which amount is 25 to 100 mol% of the total aromatic group; where X represents H, Cl, Br, I, NO2, or an alkoxy group having 1 to 4 carbon atoms, n represents an integer between 10 and 100,000, y represents (d) or (e), and R' represents (f), (g) or (h). |
