超声引发聚苯乙烯磺酸钠的降解

Degradation of sodium polystyrene sulfonate under ultrasonic irradiation

用低功率、高频率的超声波对水溶液中的聚苯乙烯磺酸钠进行降解,研究溶液浓度、pH值等对降解反应的影响,用凝胶色谱法测定降解产物的分子量及其分布,用红外光谱法以及紫外分光光度法表征了降解过程中的产物结构变化,用2,2-二苯基-1-苦肼基(DPPH)对降解过程中产生的自由基进行捕捉,证实降解反应经历了自由基历程。

The degradation of sodium polystyrene sulfonate （PSS） in aqueous solution ;.rradiated by ultrasonic waves with low ultrasonic power and high frequency was studied. The effects of PSS concentration and pH value on the degradation were investigated. The molecular weight and distribution of catabolite were measured by gel chromatography, and the structure of Catabolite was characterized by infrared spectrometry and ultraviolet spectrophotometry. A radical scavenger of 1,1-diphenyl-2-picrylhydrazyl was used to capture free radicals during the degTadation. It was proved that the degradation included a free radical mechanism.