The effects of concentration, relative permittivity, and temperature on the transport properties of sodium polystyrene sulphonate in 2-ethoxyethanol-water mixed solvent media
The effects of concentration, relative permittivity, and temperature on the transport properties of sodium polystyrene sulphonate in 2-ethoxyethanol-water mixed solvent media
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DOI：
10.1016/j.eurpolymj.2007.05.021
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发表时间：
2007-08-01
影响因子：
6
通讯作者：
Das, Bijan
中科院分区：
文献类型：
--
作者：
De, Ranjit;Das, Bijan
本文报道了在308.15、313.15、318.15和323.15K下，聚苯乙烯磺酸钠在2-乙氧基乙醇-水混合溶剂介质（含10、25、40和50wt%的2-乙氧基乙醇）中溶液电导率的精确测量结果。所用聚苯乙烯磺酸钠的取代度为1，浓度从近似1 × 10（-4）当量变化到近似1 × 10（-2）当量。1（-1）。结果表明，随着浓度的降低，等效电导率略有单调增加。研究了曼宁理论对无盐溶液的适用性，并观察到与该理论的主要差异。根据该理论推导出的等效电导率计算值低于实验值。对这种差异的可能原因进行了讨论。然而，通过调整电荷密度参数，获得了实验数据的半定量描述。研究了温度和介质相对介电常数对等效电导率的影响。(c)2007爱思唯尔有限公司版权所有。
Precise measurements on the electrical conductivity of solutions of sodium polystyrenesulphonate in 2-ethoxyethanol-water mixed solvent media containing 10, 25, 40 and 50 wt% of 2-ethoxyethanol at 308.15, 313.15, 318.15, and 323.15 K are reported here. The degree of substitution of sodium polystyrenesulphonate used was 1, and the concentrations were varied from similar to 1 X 10(-4) to similar to 1 x 10(-2) equiv. 1(-1). The results showed a slight and monotonous increase in the equivalent conductivity with decreasing polyelectrolyte concentration. The applicability of the Manning's theory for salt-free polyelectrolyte solutions was examined and a major discrepancy against the theory was observed. The calculated values of the equivalent conductivity deduced on the basis of this theory were found to be lower than the experimental ones. Possible reasons for this discrepancy have been discussed. A semi quantitative description of the experimental data is, however, obtained by adjusting the charge density parameter. The effects of the temperature and relative permittivity of the medium on the equivalent conductivity were also investigated. (c) 2007 Elsevier Ltd. All rights reserved.