| 摘要 |
<p>HIGH MODULUS OXYBENZOYL COPOLYESTER FIBERS High modulus oxybenzoyl copolyester Fibers are produced by heating to an elevated temperature and stretching oxybenzoyl copolyester fibers having molecular weights in the range of from 2,000 to 200,000 and melting points of at least 250.degree.C and comprising recurring moieties of Formulas I, II and III (I) , (II) , and (III) , wherein n is 0 or 1; x, y and z are integers; y:z = from 10:15 to 15:10, x:y and x:z = from 1:100 to 100:1; x + y z = from 30 to 600; the carbonyl group of Formula I is meta and/or para to the oxy group thereof; the carbonyl groups of Formula II are meta and/or para to each other; and the oxy atoms of Formula III are meta and/or para to each other; and in more than 50% of the total of said moieties having said mentioned groups therein they are of para configuration. For Formulas I and II n is preferably 0 and for Formula III it is usually 1.</p> |
