Polymer Electrolyte Fuel Cell Cutting-edge Research Center (FC-Cubic), National Institute of Advanced Industrial Science and Technology (AIST), 2-3-26 Aomi, Koto-ku, Tokyo 135-0064, Japan.
J Phys Chem B. 2009 Dec 10;113(49):15921-7. doi: 10.1021/jp905297m.
The effects of water on the changes in morphology of sulfonated poly(phenylene sulfide) (SPPS) hydrocarbon polymer electrolyte membranes (PEM) with an ion exchange capacity (IEC) of 0-2.0 mequiv/g are investigated using small-angle X-ray scattering (SAXS) and atomic force microscopy (AFM). Wide-angle X-ray scattering (WAXS) was used to characterize the effect of direct sulfonation on the changes in membrane crystalline structure, and it was found that the crystallinity and crystallite domain size decrease and the volume of the amorphous region in the SPPS membranes increases with increasing IEC. The experimental data have been fitted to the Porod law for approaching the analysis of the sharpness of the polymer/water interface, development of the proton channel, or dispersion of water in the hydrated membranes. Porod plots showed positive deviation which revealed that the polymer/water interface in the hydrated SPPS membrane is not smooth but diffused and a well-developed proton channel does not form in the membrane.
采用小角 X 射线散射（SAXS）和原子力显微镜（AFM）研究了离子交换容量（IEC）为 0-2.0 mequiv/g 的磺化聚（亚苯基硫醚）（SPPS）碳氢聚合物电解质膜（PEM）中水对形态变化的影响。广角 X 射线散射（WAXS）用于表征直接磺化对膜结晶结构变化的影响，结果发现，随着 IEC 的增加，SPPS 膜的结晶度和微晶尺寸减小，无定形区域的体积增加。实验数据已拟合到 Porod 定律，以接近分析聚合物/水界面的锐度、质子通道的发展或水在水合膜中的分散。Porod 图显示出正偏离，表明水合 SPPS 膜中的聚合物/水界面不光滑而是扩散的，并且在膜中没有形成发达的质子通道。
