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用自由基捕捉剂１，１－二苯基－２－三硝基苯肼（ＤＰＰＨ）对等离子体引发水溶液体系聚合时体系中的自由基浓度进行了测定．发现在等离子体引发水溶液聚合体系中，自由基浓度随放电功率，放电时间的增加而增加，而且当体系中加入单体后，在同样的条件下体系中的自由基浓度比未加单体时的浓度高．
The concentration of free radicals in the system of plasma-initiated aqueous solution polymerization was determined by using free radical scavenger 1,1-diphenyl-2-trinitrophenylhydrazine (DPPH). It was found that the concentration of free radicals increases with the increase of discharge power and discharge time in plasma-initiated aqueous polymerization. When the concentration of free radicals in the system increases with the addition of monomer, High concentration.