| 摘要 |
<p>Poly[co(4-oxybenzoate/phenyleneisophthalate)] is formed via the melt-acidolysis polymerization of appropriate monomers under conditions which have been found to substantially alleviate processing difficulties heretofore inherently associated with the biphasic nonuniform nature of such polymer wherein some regions within the polymer form an ordered anisotropic melt phase and other regions form a nonordered isotropic melt phase. The improved process of the present invention is carried out in a stirred heated reactor to which has been added an appropriate minor concentration of a preformed polymer which is capable of forming an anisotropic single phase melt. The desired polymerization is accomplished on a reliable, readily reproducible, and stable basis. A novel relatively inexpensive polymeric composition of matter is provided which is capable of exhibiting an anisotropic melt phase over a broader temperature range and of reliably undergoing melt processing to form quality three-dimensional molded articles because of its modified structural morphology resulting from a diminished biphasic nature.</p> |
