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采用分光光度法研究在二甲基甲酰胺（ＤＭＦ）和二甲亚砜（ＤＭＳＯ）混合溶剂中的多硫离子平衡表明，无论在Ｚ＝２或８／３的溶液中，当表现浓度减小时，都有利于多硫离子的降解。并且溶液中多硫离子之间的化学平衡，都随混合溶剂的组成变化，也即和介电常数有关．低介电常数有利于低聚合度的多硫自由基离子的存在．
Spectrophotometric studies of polysulfide ion balance in dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) mixed solvents showed that when the concentration was reduced in either Z = 2 or 8/3 solutions , Are conducive to the degradation of polysulfide ions. And the chemical equilibrium between the polysulfide ions in the solution varies with the composition of the mixed solvent, that is, the dielectric constant. The low dielectric constant favors the presence of low-polymerized polysulfide free radical ions.