Synthesis, structure, and phase behaviour of liquid‐crystalline rigid‐rod polyesters and polyamides with disc‐like mesogens in the main chain
Synthesis, structure, and phase behaviour of liquid‐crystalline rigid‐rod polyesters and polyamides with disc‐like mesogens in the main chain
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DOI：
10.1002/macp.1987.021880619
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发表时间：
1987-06
影响因子：
2.5
通讯作者：
H. Ringsdorf;Peter Tschirner;O. Hermann-Schönherr;J. H. Wendroff
中科院分区：
文献类型：
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作者：
H. Ringsdorf;Peter Tschirner;O. Hermann-Schönherr;J. H. Wendroff
以四取代对苯二酚和1，4-苯二胺的衍生物为原料，合成了主链上含有盘状介晶基团的芳香族聚酯和聚酰胺。根据缩合反应中使用的原子酸(对苯二甲酸、2，5-二烷氧基对苯二甲酸)，这些聚合物的重复单元带有4或6个侧基取代基。所有聚合物都高度溶解于几种有机溶剂，如CHCl3、甲苯、丙酮。用差示扫描量热法和光学偏光显微镜研究了聚合物的相行为。根据侧基的数量不同，聚酯和聚酰胺呈现结晶和热致液晶相。X射线研究表明刚性棒状聚合物呈板状堆积，我们称之为“板状”(意为板状)相。
Aromatic polyesters and polyamides with disc-like mesogens in the main chain were prepared from tetra-substituted hydroquinones and derivatives of 1,4-phenylenediamine. Depending on the atomatic acids (terephthalic acid, 2,5-dialkoxyterephthalic acid) used in the condensation reaction, the repeating units of these polymers carried 4 or 6 lateral substitutents. All polymers are highly soluble in several organic solvents, e.g. CHCl3, toluene, acetone. The phase behaviour of the polymers was studied by means of differential scanning calorimetry and optical polarizing microscopy. Depending on the number of lateral substitutents the polyesters and polyamides show crystalline and thermotropic liquid-crystalline phases. X-ray investigations showed a board-like Packing of the rigid-rod polymers which we have termed as a “sanidic” (meaning board-like) phase.