Structural Investigation of Polyurethane Based Gel Polymer Electrolytes Using Small Angle X-ray Scattering (SAXS)
Structural Investigation of Polyurethane Based Gel Polymer Electrolytes Using Small Angle X-ray Scattering (SAXS)
复制标题
使用小角 X 射线散射 (SAXS) 研究聚氨酯基凝胶聚合物电解质的结构
DOI：
10.1143/jpsjs.79sa.154
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发表时间：
2010
影响因子：
1.7
通讯作者：
R. Srinivasa
中科院分区：
文献类型：
--
作者：
A. Kulkarni;R. Balaji;R. Srinivasa
以聚氧化乙烯三醇（PEO）和4，4-二苯基甲烷二异氰酸酯（MDI）为原料，合成了交联聚合物PU（聚氨酯）凝胶电解质。该凝胶的液体电解质的最小和最大摄入量分别为35和65重量%。PU凝胶电解质的WAXD图案显示无特征的行为，表明不存在结晶相。聚氨酯凝胶的SAXS谱图在较低的q值（约0.7nm-1）处显示出宽峰，这归因于硬畴和软畴两相的存在。凝胶的结构被推断为一个连续的软相分散的硬域。硬畴的形状和界面由log（I（q））对log（q）图中曲线的斜率确定。曲线的斜率随着碳酸丙烯酯（PC）含量的增加而减小。斜率从-1.5减小到-0.2，表明当PC含量为1.5%时，硬畴的形状由扩散椭球形变为扩散球形。
Cross linked polymers PU (polyurethane) gel electrolytes have been synthesized from polyethylene oxide triol (PEO triol) and 4,4-methylenediphenyl diisocyanate (MDI). The minimum and maximum intake of liquid electrolyte by this gel is 35 and 65 wt % respectively. WAXD patterns for PU gel electrolytes shows featureless behaviour indicating absence of crystalline phase. SAXS pattern of polyurethane gel exhibits a broad peak at lower q value (∼0.7 nm -1 ) that is attributed to the presence of two phases, namely hard domains and soft domains. The structure of the gel was inferred as a continuous soft phase with dispersed hard domains. The shape and interface of the hard domains were determined from the slope of the curve in log ( I ( q )) versus log ( q ) plot. The slope of the curve decreases with increase in propylene carbonate (PC) content. The decrease in slope from -1.5 to -0.2 suggest that the shape of the hard domains changed from diffused ellipsoidal to the diffused spherical when the PC content was i...