新型聚醚聚氨酯/硬段模型化合物/高氯酸钠复合物的制备和表征

Preparation and Characterization of Novel Poly(ether urethane)/Hard-segment Model Compound/NaClO_4 Complexes

以聚醚聚氨酯和硬段模型化合物为聚合物基体 ,高氯酸钠为掺杂盐 ,合成了一系列新型的聚氨酯 /硬段模型化合物 /高氯酸钠复合物。利用FR -IR、DSC、AFM和复阻抗谱等表征手段对其形态和性能进行了研究。结果表明 :盐浓度显著影响聚合物 -阳离子间相互作用、玻璃化转变温度和体系的形态 ;体系中的醚氧基团和羰基都可与钠离子进行络合 ,温度变化可以导致不同程度的络合 ;在低盐浓度下 ,复合物的Tg 随盐浓度的增加逐渐上升 ,而在一定的浓度之上 ,玻璃化转变温度又明显下降 ;通过调整盐的含量可以得到不同的表面形态。随着温度的升高 。

Using the blends of poly(ether urethane) (PEG PU) and hard segment model compound (HD) as polymer matrix, sodium pechlorate (NaClO 4) as doped salt, a series of novel polymer/salt complexes were prepared successfully. Their properties and morphology were investigated by means of FT IR, DSC, atomic force microscopy (AFM) and complex impedance analysis. Results demonstrate that the salt concentration significantly influences the polymer cation interaction, T g and morphology of the system. Both ether oxygen group and carbonyl in the system take participate in the coordination with sodium cation. The change of temperature can lead to different coordination degree between sodium cation and carbonyl or ether oxygen group. At low salt concentration, T g of the complex rises gradually with increasing salt concentration, however, above a critical concentration, T g drops apparently. Different surface morphology can be obtained through adjusting the content of doped salt. With increasing temperature, the ionic conductivity of the system enhances apparently.