| 摘要 |
A novel polyester is provided which has been found to exhibit an optically anisotropic melt phase at a temperature which enables it readily to undergo melt processing to form quality fibers, films, molded articles, etc. The polyester consists essentially of substantial concentrations of 3-phenyl-4-oxybenzoyl and/or 2-phenyl-4-oxybenzoyl moieties in combination with dioxy aryl and dicarboxy aryl moieties in the proportions indicated. In a further embodiment 4-oxybenzoyl and/or 6-oxy-2-naphthoyl moieties also are included. The wholly aromatic polyester is capable of forming an anisotropic melt at a temperature below approximately 350 DEG C., and preferably at a temperature below approximately 320 DEG C.
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