Selectively sulfonated poly(aryl ether sulfone)‐b‐polybutadiene for proton exchange membrane
Selectively sulfonated poly(aryl ether sulfone)‐b‐polybutadiene for proton exchange membrane
复制标题
用于质子交换膜的选择性磺化聚（芳醚砜）-b-聚丁二烯
DOI：
10.1002/polb.20658
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Jie Yin
中科院分区：
文献类型：
--
作者：
Xingpeng Zhang;Shengzhou Liu;Jie Yin
以端羧基聚丁二烯（CTPB）和磺化聚芳醚砜（SPAES）为原料，用3,3'-二磺酸-4,4'-二氯二苯砜（SDCDPS）与4,4'-二氯二苯砜（DCDPS）的不同摩尔比直接缩聚4,4'-二氯二苯砜（SDCDPS），制备了一系列选择性磺化聚芳醚砜-聚丁二烯共聚物（SPAES）。并对柔性铅块进行选择性后磺化反应。采用原位生成过酸法对膜进行了环氧化改性。用1h NMR测定了SPAES中附着在芳环上的磺酸基团的含量，与控制比值吻合较好。采用傅里叶变换红外光谱研究了刚性嵌段磺化对铅嵌段后磺化反应的影响。用差示扫描量热法研究了酸态膜的玻璃化转变温度（Tg）和熔融峰温度（tpm）。Fenton试剂试验表明，选择性磺化的spes -b- pb膜具有良好的抗氧化稳定性。透射电镜观察了棒状刚性SPAES块和离子互穿网络的微观结构。复合阻抗测量表明，SPAES-40环氧化膜的质子电导率最高（1.08 x 10 -1 S/cm, 90°C），这是由于形成了明显的离子网络。
A series of selectively sulfonated poly(arylene ether sulfone)-&-polybutadiene copolymers (SPAES-b-PB) were prepared based on carboxyl terminated polybutadiene (CTPB) and sulfonated poly(arylene ether sulfone) (SPAES) that was directly prepared by polycondensation of 4,4'-isopropylidenediphenol with different molar ratios of disodium 3,3'-disulfonate-4,4'-dichlorodiphenyl sulfone (SDCDPS) to 4,4'-dichlorodiphenylsulfone (DCDPS), and subsequent selective postsulfonation of flexible PB block was carried out. Epoxidized modification of membranes was conducted by an in situ-generated peracid method. The content of sulfonic acid groups attaching to aromatic rings in SPAES was determined by 1 H NMR and was in good aggrement with the controlled ratios. The effect of sulfonated rigid blocks on the postsulfonation of PB blocks was studied by Fourier transform infrared spectroscopy. The glass transition temperature (Tg) and the temperature of the melting peak (T p m ) of membranes in acid form were studied by differential scanning calorimetry. Fenton's reagent test revealed that the selectively sulfonated SPAES-b-PB membranes had good stability to oxidation. The microstructure of rod-like rigid SPAES blocks and interpenetrating network of ions were observed by transmission electron microscopy. Complex impedance measurement showed that an epoxidized membrane with SPAES-40 exhibited the highest proton conductivity (1.08 x 10 -1 S/cm, 90 °C), which was due to the formation of obvious ionic networks.