Imidazolium Polyesters: Structure-Property Relationships in Thermal Behavior, Ionic Conductivity, and Morphology
作者:Minjae Lee、U. Hyeok Choi、David Salas-de la Cruz、Anuj Mittal、Karen I. Winey、Ralph H. Colby、Harry W. Gibson
DOI:10.1002/adfm.201001878
日期:2011.2.22
conductivities of the mono‐imidazolium polyesters (4 × 10−6 to 3 × 10−5 S cm−1) are higher than those of the corresponding bis‐imidazolium polyesters (4 × 10−9 to 8 × 10−6 S cm−1), even though the bis‐imidazolium polyesters have higher ion concentrations. Counterions affect ionic conduction significantly; all polymers with TFSI− counterions have higher ionic conductivities than the hexafluorophosphate analogs
合成并表征了新的双(ω-羟烷基)咪唑鎓盐和1,2-双[ N-(ω-羟烷基)咪唑鎓]乙烷盐;大多数盐是室温离子液体。这些羟基末端官能化的离子液体与二酰氯聚合,生成在主链中嵌入咪唑阳离子的聚酯。通过X射线散射,发现四种聚酯在室温下为半结晶态:单咪唑C 11癸二酸酯C 6(4e),单咪唑C 11癸二酸酯C 11 11(4c),双咪唑)乙烷-C 6-癸二酸酯-C 6(5a)和双(咪唑)乙烷-C11癸二酸酯C 11(5c),全都带有六氟磷酸根抗衡离子。其他咪唑聚酯,包括所有那些与双(三氟甲烷磺酰)亚胺(TFSI - )抗衡离子,在室温下是无定形的。单咪唑鎓聚酯的室温离子电导率(4×10 -6至3×10 -5 S cm -1)高于相应的双咪唑鎓聚酯的室温离子电导率(4×10 -9至8×10 -6 S cm -1),即使双咪唑鎓聚酯具有更高的离子浓度。抗衡离子会严重影响离子传导。所有具有TFSI的聚合物