Jin Lei, Jang Hohyoun, Yoo Jiho, Ha Jaeseong, Choi Kunyoung, Ryu Taewook, Lee Sungkwun, Kim Whangi
Department of Applied Chemistry, Konkuk University, Chungju 380-701, Korea.
Polymers (Basel). 2016 Mar 29;8(4):114. doi: 10.3390/polym8040114.
Spiro poly(isatin-ethersulfone) polymers were prepared from isatin and bis-2,6-dimethylphenoxyphenylsulfone by super acid catalyzed polyhydroxyalkylation reactions. We designed and synthesized bis-2,6-dimethylphenoxyphenylsulfone, which is structured at the meta position steric hindrance by two methyl groups, because this structure minimized crosslinking reaction during super acid catalyzed polymerization. In addition, sulfonic acid groups were structured in both side chains and main chains to form better polymer chain morphology and improve proton conductivity. The sulfonation reactions were performed in two steps which are: in 3-bromo-1-propanesulfonic acid potassium salt and in con. sulfuric acid. The membrane morphology was studied by tapping mode atomic force microscope (AFM). The phase difference between the hydrophobic polymer main chain and hydrophilic sulfonated units of the polymer was shown to be the reasonable result of the well phase separated structure. The correlations of proton conductivity, ion exchange capacity (IEC) and single cell performance were clearly described with the membrane morphology.
螺环聚（异吲哚酮 - 醚砜）聚合物由异吲哚酮和双 - 2,6 - 二甲基苯氧基苯基砜通过超酸催化的多羟基烷基化反应制备而成。我们设计并合成了双 - 2,6 - 二甲基苯氧基苯基砜，其在间位通过两个甲基构建了空间位阻，因为这种结构能使超酸催化聚合过程中的交联反应降至最低。此外，磺酸基团分布在侧链和主链中，以形成更好的聚合物链形态并提高质子传导率。磺化反应分两步进行，分别是在3 - 溴 - 1 - 丙烷磺酸钾盐和浓硫酸中进行。通过轻敲模式原子力显微镜（AFM）研究了膜的形态。聚合物疏水主链和亲水磺化单元之间的相位差表明其具有良好的相分离结构。质子传导率、离子交换容量（IEC）与单电池性能之间的相关性通过膜形态得到了清晰的描述。
