Polyether/salt hybrid: 6. Effect of sulfonamide ends having different alkyl groups on the bulk ionic conductivity
Polyether/salt hybrid: 6. Effect of sulfonamide ends having different alkyl groups on the bulk ionic conductivity
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聚醚/盐杂化物：6.具有不同烷基的磺酰胺端基对体离子电导率的影响
DOI：
10.1016/s0032-3861(96)00726-4
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发表时间：
1997
期刊：
影响因子：
4.6
通讯作者：
H. Ohno
中科院分区：
文献类型：
--
作者：
Y. Tominaga;K. Ito;H. Ohno
制备了端部含磺酰胺基的聚环氧乙烷（PEO）/盐杂化材料（PEO 1000-（SAR）2 M2; R = -CF 3、-CH 3和-C6 H5; M = Li、Na、K、Rb和Cs），并测定了其体电导率。其中，具有三氟甲基磺酰胺基的盐显示出最高的离子电导率（例如，钾盐在303 K下为2.83 × 10 - 5S cm-1）。虽然这些盐的玻璃化转变温度（Tg）和PEO部分的相同平均分子量几乎没有差异，但离子电导率存在相当大的差异。差异归因于取决于末端烷基的磺酰胺基团的解离常数。
Poly(ethylene oxide) (PEO)/salt hybrids having sulfonamide groups on the PEO chain ends (PEO1000-(SAR)2M2; R = -CF3, -CH3and -C6H5; M = Li, Na, K, Rb and Cs) were prepared, and the bulk ionic conductivity was measured as a new type of ion conductive matrix. Among these, the salt having a trifluoromethyl sulfonamide group showed the highest ionic conductivity (for example, 2.83 × 10−5S cm−1at 303 K for potassium salt). Although there was little difference in the glass transition temperature (Tg) for these salts and the same average molecular weight of the PEO part, there was a considerable difference in the ionic conductivity. The difference was attributed to the dissociation constant of sulfonamide groups depending upon the terminal alkyl groups.