聚合物的交流示波极谱滴定分析——碱解法测定聚苯乙烯-顺丁烯二酸共聚物的磺化度  

Determination of Sulfo-group in Sulfonated Copolymer of Styrene and Maleic Anhydride Using Alternating Current Oscillopolarographic Titration Method

作　　者：刘快之[1] 张举贤[1] 耿春芳[1] 

机构地区：[1]河南大学化学系,开封475001

出　　处：《分析化学》1991年第1期108-110,共3页Chinese Journal of Analytical Chemistry

摘　　要：本文提出苯乙烯-顺丁烯二酸共聚物的磺酸盐(SSMA)中磺酸基的测定方法。将SSMA与KOH在340℃共熔进行磺基碱解,所分解的SO_3^(2-)氧化为SO_4^(2-)后用过量Ba^(2+)予以沉淀,剩余Ba^(2+)用K_2CrO_4,进行交流示波极谱滴定,以间接求得磺酸基含量。A mothod for the determination of sulfe-group is diseribed in sulfonated copolymer of styrene and maleic anhydride(SSMA). Samples of SSMA with KOH were fused at 340℃, SO_3^(2-) was oxidized to SO_4^(2-). SO_4^(2-) ions were precipitated as BaSO_4 by the addition of an excess of standard barium salt solution. The excess Ba^(2+) ions were then analyzed by al ternating current oscillopolarographic titration using a mercury drop electrode. The degree of sulfonaion of SSMA was thus indirectly determined. The methotd was rapid and accurate.

关 键 词：SSMA 磺酸基 滴定 交流示波极谱 

分 类 号：O631.6[理学—高分子化学]