Perevedentsev Aleksandr, Stavrinou Paul N, Bradley Donal D C, Smith Paul
Department of Physics and Centre for Plastic Electronics, Imperial College London London, SW7 2AZ, United Kingdom.
Department of Materials, Eidgenössische Technische Hochschule (ETH) Zürich Vladimir-Prelog-Weg 5, 8093, Zürich, Switzerland.
J Polym Sci B Polym Phys. 2015 Nov 1;53(21):1481-1491. doi: 10.1002/polb.23798. Epub 2015 Aug 19.
Polymer-solvent compound formation, occurring via co-crystallization of polymer chains and selected small-molecular species, is demonstrated for the conjugated polymer poly(9,9-dioctylfluorene) (PFO) and a range of organic solvents. The resulting crystallization and gelation processes in PFO solutions are studied by differential scanning calorimetry, with X-ray diffraction providing additional information on the resulting microstructure. It is shown that PFO-solvent compounds comprise an ultra-regular molecular-level arrangement of the semiconducting polymer host and small-molecular solvent guest. Crystals form following adoption of the planar-zigzag β-phase chain conformation, which, due to its geometry, creates periodic cavities that accommodate the ordered inclusion of solvent molecules of matching volume. The findings are formalized in terms of nonequilibrium temperature-composition phase diagrams. The potential applications of these compounds and the new functionalities that they might enable are also discussed. © 2015 The Authors. Journal of Polymer Science Part B: Polymer Physics published by Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. , , 1481-1491.
通过共轭聚合物聚（9,9 - 二辛基芴）（PFO）与一系列有机溶剂的共结晶，证明了聚合物 - 溶剂化合物的形成。通过差示扫描量热法研究了PFO溶液中由此产生的结晶和凝胶化过程，X射线衍射提供了有关所得微观结构的更多信息。结果表明，PFO - 溶剂化合物由半导体聚合物主体和小分子溶剂客体的超规则分子水平排列组成。采用平面锯齿形β相链构象后形成晶体，由于其几何形状，会产生周期性空腔，可容纳体积匹配的溶剂分子的有序包含。这些发现通过非平衡温度 - 组成相图得以形式化。还讨论了这些化合物的潜在应用以及它们可能实现的新功能。©2015作者。由Wiley Periodicals, Inc.出版的《聚合物科学杂志B辑：聚合物物理学》。J. Polym. Sci., Part B: Polym. Phys.,, 1481 - 1491。
