Melt-processible polyester which is optically anisotropic in the melt phase and which consists essentially of the following molar amounts of the recurring units, with the sum of the molar amounts being 100%:
(a) about 20 to about 85%, of
(b) about 15 to about 80% of approximately equimolar amounts of
or
and
wherein
each of X', X2, X3, and X4 is independently selected from H, Cl, and CH3;
Ar is selected from 1,4-phenylene, 1,3-phenylene. 4,4'- oxybiphenylene, 4,4'-biphenylene, and 2,6-naphthylene;
Ar' is selected from
and n is 0 or 1.
可熔融加工聚酯,在熔融阶段具有光学各向异性,主要由以下摩尔量的重复单元组成,摩尔量之和为 100%:
(a) 约 20%至约 85%,其中
(b) 约 15%至约 80%的约等摩尔量的
或
和
其中
X'、X2、X3 和 X4 各自独立选自 H、Cl 和
CH3;
Ar 选自 1,4-亚苯基、
1,3-亚苯基。4,4'-氧
联苯、4,4'-
联苯和 2,6-
萘;
Ar' 选自
和 n 是 0 或 1。