Characterization of Aluminum-Neutralized Sulfonated Styrenic Pentablock Copolymer Films
Characterization of Aluminum-Neutralized Sulfonated Styrenic Pentablock Copolymer Films
复制标题
铝中和磺化苯乙烯五嵌段共聚物薄膜的表征
DOI：
10.1021/ie202546z
复制
发表时间：
2013
影响因子：
4.2
通讯作者：
D. R. Paul
中科院分区：
文献类型：
--
作者：
Geoffrey M. Geise;C. Willis;C. Doherty;A. Hill;T. Bastow;Jamie T Ford;K. Winey;B. Freeman;D. R. Paul
采用悬浮相中和法制备了磺酸型苯乙烯五嵌段共聚物铝交联聚合物薄膜。用27 Al固体核磁共振证实了铝的中和作用，在1 mol/L氯化钠溶液中浸泡30 d后，铝中和的聚合物对钠离子的交换有抑制作用。探讨了铝中和对聚合物形态、力学性能、水盐传输性能和自由体积的影响。通过小角X-射线散射（SAXS）测量的形态的主要间距，减少后，磺化聚合物的中和。水合铝中和的聚合物比未中和的聚合物机械强度更强，但干燥的铝中和的聚合物比未中和的聚合物更脆。聚合物的磺酸官能团的中和导致吸水率降低5.5倍。铝中和后吸水率降低。
Suspension-phase neutralization of an acid-form sulfonated styrenic pentablock copolymer was used to prepare aluminum cross-linked polymer films. Aluminum neutralization was confirmed by 27Al solid state NMR, and the aluminum-neutralized polymer resisted ion exchange to the sodium counterion form when the polymer was soaked in 1 mol/L sodium chloride for 30 days. The effects of aluminum neutralization on polymer morphology, mechanical properties, water and salt transport properties, and free volume were explored. The primary spacing of the morphology, as measured by small-angle X-ray scattering (SAXS), decreased upon neutralization of the sulfonated polymer. The hydrated aluminum-neutralized polymer was mechanically stronger than the non-neutralized polymer, but the dry aluminum-neutralized polymer was more brittle than the non-neutralized polymer. Neutralization of the polymer’s sulfonic acid functionality resulted in a 5.5-fold decrease in water uptake. This water uptake decrease upon aluminum neutraliz...