| 摘要 |
PCT No. PCT/EP97/04266 Sec. 371 Date Feb. 5, 1999 Sec. 102(e) Date Feb. 5, 1999 PCT Filed Aug. 5, 1997 PCT Pub. No. WO98/05698 PCT Pub. Date Feb. 12, 1998A chiral nematic polycarbonate having carbonate units, of the formula I where the w/x/y/z molar ratio is 1 to 20/1 to 5/0 to 10/0 to 10, A is a mesogenic group of the formula or ; and B is a chiral group. |
