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首页> 外文期刊>Polymers for advanced technologies >Morphological investigations of block sulfonated poly(arylene ether ketone) copolymers as potential proton exchange membranes
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Morphological investigations of block sulfonated poly(arylene ether ketone) copolymers as potential proton exchange membranes

机译：嵌段磺化聚（亚芳基醚酮）共聚物作为潜在质子交换膜的形态研究

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A series of block sulfonated poly(arylene ether ketone) (SPAEK) copolymers with different block lengths and ionic contents were synthesized by a two-stage process. The morphology of these block SPAEK copolymers was investigated by various methods, such as differential scanning calorimetry (DSC), transmission electron microscope (TEM), and small angle X-ray scattering (SAXS). Dark colored ionic domains of hundreds of nanometers spreading as a cloud-like belt were observed in TEM images. The sizes of the ionic domains as a function of block copolymer composition were determined from SAXS curves. The results for the evolution of ionic domains revealed that the block copolymers exhibited more clearly phase-separated microstructure with increasing ionic contents and hydrophobic sequence lengths. Proton conductivity is closely related to the microstructure, especially the presence of large interconnected ionic domains or ionic channels. Block SPAEK membranes have interconnected ionic clusters to provide continuous hydrophilic channels, resulting in higher proton conductivity.
机译：通过两步法合成了一系列嵌段长度和离子含量不同的嵌段磺化聚（亚芳基醚酮）（SPAEK）共聚物。通过各种方法研究了这些嵌段SPAEK共聚物的形态，例如差示扫描量热法（DSC），透射电子显微镜（TEM）和小角X射线散射（SAXS）。在TEM图像中观察到数百纳米的深色离子域扩散成云状带。由SAXS曲线确定离子域的大小与嵌段共聚物组成的关系。离子域的演化结果表明，随着离子含量和疏水序列长度的增加，嵌段共聚物表现出更清晰的相分离微观结构。质子电导率与微观结构密切相关，特别是存在较大的相互连接的离子域或离子通道。 Block SPAEK膜具有相互连接的离子簇，以提供连续的亲水通道，从而提高了质子传导性。

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