| 摘要 |
The invention relates to synthetic yarns spun from sulphuric acid anisotropic solutions of rigid chain aromatic polyamides blended with aliphatic polyamides. Disclosed is a spinning dope composition comprising an aromatic and an aliphatic polyamide and concentrated sulphuric acid, wherein at least one of the aromatic and aliphatic polyamides is a copolymer composed of two aromatic and two aliphatic homopolymer units, respectively, the aromatic copolymer having the formula: ¢-(-HN-C6H4-NHCO-C6H4-CO-)-u -(-HN-C6H4-CONH-C6H4-NHCO-C6H4-CO-)-w!, wherein u = 75-95 wt.%, preferably 80-90 wt.%, and w = 5-25 wt.%, preferably 10-20 wt.%; and the aliphatic copolymer has the formula ¢-(-HN-(CH2)6-NHCO-(CH2)4-CO-)-n -(-HN-(CH2)5-CO-)-m! wherein n = 95-50 wt.%, preferably 93-60 wt.%, and m = 5-50 wt.%, preferably 7-40 wt.%. |
