A thermotropic wholly aromatic polyester is provided which is capable of forming an anisotropic melt phase. This novel polyester displays surprising tractability and may be used as a moulding resin or may be melt spun into fibres. The aromatic polyester of the present invention consists essentially of the recurring units (a) 2,6,-dioxyanthraquinone moiety, (b) 4-oxybenzoyl moiety, and (c) aromatic diacid moiety. The resulting polyester exhibits a melting point below approximately 375°C, and preferably below approximately 350°C. Fibres which are melt spun from the polyester exhibit unexpectedly good thermal stability. The desirable tractability properties of the polyester are attributed to its anisotropic melt phase, which is due to the inclusion of the 2,6-dioxyanthraquinone moiety in the polymer.
我们提供了一种可形成各向异性熔融相的热致性全芳香族聚酯。这种新型聚酯具有惊人的可塑性,可用作模塑
树脂,也可熔融纺丝成纤维。本发明的芳香族聚酯主要由以下重复单元组成:(a) 2,6,-二氧
蒽醌分子;(b) 4-氧苯甲酰基分子;(c) 芳香族二酸分子。所得聚酯的熔点低于约 375°C,最好低于约 350°C。用这种聚酯熔融纺丝制成的纤维具有出乎意料的良好热稳定性。这种聚酯之所以具有理想的可塑性,是因为聚合物中含有 2,6-二氧
蒽醌分子,从而形成了各向异性的熔融相。