Hida Naoki, Nakajima Tatsunaga, Hara Mitsuo, Seki Takahiro, Nagano Shusaku
Department of Molecular & Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya, 464-8603, Japan.
Department of Chemistry, College of Science, Rikkyo University, 3-34-1, Nishi-Ikebukuro, Toshima, Tokyo, 171-8501, Japan.
Macromol Rapid Commun. 2023 Mar;44(5):e2200761. doi: 10.1002/marc.202200761. Epub 2022 Nov 23.
Two liquid crystalline polymers containing an azobenzene or cyanobiphenyl mesogenic side chain that adopt smectic A phases are mechanically mixed at 1:1 mesogen molar ratio at an isotropic phase temperature and then cooled. The resultant binary polymer mixture behaves like a single component as revealed by polarized microscopy observation and differential scanning calorimetry, indicating that the binary mixture forms a fully compatible polymer blend. Moreover, the simple polymer blend unexpectedly leads to a higher-ordered smectic E phase where a herringbone structure is formed with restricted mesogen axis rotation. These results suggest a specific intermolecular interaction between the two mesogens, thereby inducing unusual compatibilized polymer blends and the most ordered liquid crystal (LC) phase.
两种含有偶氮苯或氰基联苯介晶侧链且呈现近晶A相的液晶聚合物在各向同性相温度下以1:1的介晶摩尔比进行机械混合，然后冷却。偏光显微镜观察和差示扫描量热法表明，所得二元聚合物混合物表现得如同单一成分，这表明二元混合物形成了完全相容的聚合物共混物。此外，这种简单的聚合物共混物意外地导致了更高有序的近晶E相，其中形成了具有受限介晶轴旋转的人字形结构。这些结果表明两种介晶之间存在特定的分子间相互作用，从而诱导出不同寻常的相容聚合物共混物和最有序的液晶（LC）相。
