| 摘要 |
Aramids, which in the undrawn state have high tensile strengths and tensile elongations, and which after drawing have in addition high tensile moduli, are made from units derived from selected 2,2'- disubstituted-4,41-bibenzoic acids, p-phenylenediamine, and terephthalic acid. The aramids are useful for ropes and composites. |
