| 摘要 |
<p>Aromatic polyamides of the invention are polyamides comprising a recurring unit <CHEM> and a recurring unit [-NH-Ar1-NH-] and copolyamides comprising a recurring unit <CHEM> and a recurring unit [-NH-Ar2-NHCO-Ar3-CO-] wherein Ar1 and Ar2 are, for example, phenylene group, naphthylene group, biphenylene group, and 4,4'-methylenediphenylene group and Ar3 is, for example, phenylene group, naphthylene group and biphenylene group in which both the bonding chains extend in the coaxial direction or in the parallel direction to axis. The aromatic polyamide of the invention has high glass transition temperature and has heat resistance, high strength, and high elasticity and besides is soluble in various solvents and is excellent in spinnability and film-formabillty. The aromatic polyamide is molded into fibers or films and can be utilized as electric insulating materials, laminates, varnishes, fabrics, synthetic papers, etc.</p> |
