Synthesis of novel engineering polymers containing basic side groups and their application in acid-base polymer blend membranes
Synthesis of novel engineering polymers containing basic side groups and their application in acid-base polymer blend membranes
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DOI：
10.1016/s1383-5866(00)00146-5
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发表时间：
2001-03-01
影响因子：
8.6
通讯作者：
Ullrich, A
中科院分区：
文献类型：
--
作者：
Kerres, J;Ullrich, A
开发了含有吡啶和二甲氨基等N-碱性侧基的新型改性PSU Udel(R)。改性PSU是通过(I)将PSU邻位锂化到砜桥上，(Ii)锂化PSU与芳香酮(如2，2‘-联吡啶酮、4，4’-二甲氨基二苯甲酮)、芳香醛(如2-、3-和4-吡啶醛)、4-N，N-二乙氨基苯甲醛以及芳香酸酯(如异烟酸乙酯和4-N，N-二甲氨基苯甲酸乙酯)反应合成的。通过核磁共振、元素分析和热重分析(TGA)对碱性PSU聚合物进行了表征。将选定的碱性聚合物与聚醚醚酮(PEEK)磺酸混合，得到聚合物酸碱共混物。用交流阻抗谱表征了共混膜的离子导电性，用透射电子显微镜(TEM)表征了膜的形态，用热重分析(TGA)表征了共混膜的热稳定性。当离子交换容量大于或等于1meq/g时，酸碱共混物表现出良好的离子导电性和良好的热稳定性。透射电子显微镜研究结果表明，酸碱共混物是相容的，没有观察到聚合物微相分离。(C)2001 Elsevier Science B.V.保留所有权利。
New modified PSU Udel(R) containing N-basic side groups like pyridine and dimethylamino groups have been developed. The modified PSU was synthesized via (i) lithiation of PSU ortho to the sulfone bridge and (ii) reaction of the lithiated PSU with aromatic ketones like 2,2'-bipyridylketone, 4,4'-dimethylaminobenzophenone, aromatic aldehydes like 2-, 3-, and 4-pyridinealdehyde, and 4-N,N-diethylaminobenzaldehyde, and aromatic carboxylic acid esters like isonicotinic acid ethyl ester and 4-N,N-dimethylaminobenzoic acid ethyl ester. The basic PSU polymers were characterized via NMR, elemental analysis, and thermogravimetry (TGA). Selected basic polymers were mixed with poly(etheretherketone) (PEEK) sulfonic acid to yield polymeric acid-base blends. The obtained blend membranes were characterized in terms of ionic conductivity by impedance spectroscopy, in terms of morphology by transmission electron microscopy (TEM), and in terms of thermal stability by TGA. The acid-base blends show good ionic conductivities at ion-exchange capacities of greater than or equal to 1 meq/g, and good thermal stabilities. The TEM investigations yielded the result that the acid-base-blends are miscible-no polymer-microphase separation could be observed. (C) 2001 Elsevier Science B.V. All rights reserved.