Polyether/salt hybrid: 5. Phase and bulk electrochemical response of viologens having poly(ethylene oxide) chain
Polyether/salt hybrid: 5. Phase and bulk electrochemical response of viologens having poly(ethylene oxide) chain
复制标题
聚醚/盐杂化物：5.具有聚环氧乙烷链的紫精的相和体电化学响应
DOI：
10.1016/s0032-3861(96)00579-4
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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：
K. Ito;H. Ohno
制备了聚环氧乙烷/紫精杂化材料，研究了聚环氧乙烷/紫精杂化材料的电化学氧化还原行为。我们分析了杂化材料中PEO部分的相对分子质量(MW)对其力学性能和本体氧化还原响应的影响。完全无定形紫精杂化材料在较宽的温度范围内表现出体相氧化还原反应。由于紫精的聚氧化乙烯部分的相对分子质量高于2000的混合物具有冰点(Tf)，因此在低于Tf的块体中没有观察到电化学响应，因为扩散系数低。在聚合物杂化体系中加入LiClO4后，体系的凝固转变热降低并消失，反映出完全无定形的基质。
Poly(ethylene oxide)/viologen hybrid was prepared, and its electrochemical redox response was analysed in the bulk or in poly(ethylene oxide) (PEO) with a molecular weight of 200 (PEO200). We analysed the effect of molecular weight (Mw) of the PEO part in the hybrid on the mechanical property and redox response in the bulk. Totally amorphous viologen hybrid showed a redox response in the bulk over a wide temperature range. Since the viologen hybrid with a Mwof the PEO part higher than 2000 showed a freezing point (Tf) the electrochemical response was not observed in the bulk below Tfbecause of low diffusion coefficient. By adding LiClO4to the polymerized hybrid, the solidifying transition enthalpy decreased and vanished, reflecting the totally amorphous matrix.