ELECTROSTATIC PERSISTENCE LENGTH OF A WORMLIKE POLYELECTROLYTE
ELECTROSTATIC PERSISTENCE LENGTH OF A WORMLIKE POLYELECTROLYTE
复制标题
DOI：
10.1021/ma60059a011
复制
发表时间：
1977-01-01
期刊：
影响因子：
5.5
通讯作者：
FIXMAN, M
中科院分区：
文献类型：
--
作者：
SKOLNICK, J;FIXMAN, M
Kratky和Porod的蠕虫模型已扩展到“局部刚性”聚电解质。忽略排除的体积效应，得到了连续均匀电荷分布的静电持续长度Pei，其中既不允许由于弯曲引起的电荷重排，也不允许由于热运动引起的涨落。将实验测定的羧甲基纤维素在氯化钠水溶液中的尺寸与理论结果进行了比较，表明理论与实验符合得很好。在附录中，研究了离散模型和连续模型之间的关系。此外，我们还考虑了有涨落和没有涨落的后排连续电荷分布。如果假设聚电解质是局部刚性的，则后两种情况的结果与连续、均匀的情况相同，在这种情况下，电荷被冻结在适当的位置。
The worm model of Kratky and Porod has been extended to “locally stiff’polyelectrolytes. Neglecting excluded volume effects, the electrostatic persistence length, Pei, has been obtained for a continuous, uniform charge distribution in which both charge rearrangements due to bending and fluctuations due to thermal motion are not allowed. Comparisons of experimentally determined dimensions of carboxymethylcellulose in aqueous NaCl with theo-retical resultsreveals good agreement between theory and experiment. In the Appendix, the relationship between the discrete and continuous model is examined. Furthermore we treat the continuous charge distribution with rear-rangements with and without fluctuations. If the polyelectrolyte is assumedto be locally stiff, the results of the latter two cases reduce identically to the continuous, uniform case in which thecharges are frozen in place.