| 摘要 |
PURPOSE:To obtain the film excellent in heat resistance and mechanical properties, capable of giving drawn films small in the decline of the mechanical properties in the transverse direction, useful as e.g. a magnetic tape,-by copolymerizing 9,9-bis(4-aminophenyl)fluorene and other relevant monomer(s). CONSTITUTION:2-Chloro-p-phenylenediamine, 4,4'-diaminodiphenyl ether, etc., and 9,9-bis(4-aminophenyl)fluorene are homogeneously agitated and dispersed in a solvent such as N-methyl-2-pyrrolidone. The resultant dispersion is chilled to 10 deg.C in an ice bath and then incorporated with terephthaloyl dichloride followed by calcium carbonate. The mixture is agitated at 40 deg.C for 3hr to conduct a dehydrochlorination, and the resultant viscous solution is cast on a glass plate with an applicator and then dried in a hot-air oven at 120 deg.C followed by peeling the resultant film off the glass plate, and the film is then drawn and heat treated, thus obtaining the aromatic polyamide film with the recurring unit of the formula [R1-R3 are phenylene, polyphenylene, etc., each; molar ratio p/q is (80:20) to (99.9:0.1)] accounting for >=60mol% of the total recurring units. |
