2-Mercaptobenzimidazole used as antioxidant in polymeric materials. Estimation by derivative spectrophotometry

被引:0
作者
Moldovan, Z
Alexandrescu, L
机构
[1] Univ Bucharest, Fac Chem, Dept Analyt Chem, Bucharest 703461, Romania
[2] Res Dev Natl Inst Text & Leather, Div Leather & Footwear, Res Inst, Bucharest, Romania
关键词
2-mercaptobenzimidazole; antioxidant; rubber mixtures; derivative spectrophotometry;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A method for the determination of 2-mercaptobenzimidazole (MB) in mixtures by derivative spectrophotometry has been developed. MB is used as antioxidant in the manufacture of industrial rubber. Derivative spectrophotometry has been applied for the elimination of the mutual interferences of the other polymer additives in the MB estimation. Thus, the procedure works whitout any separation step of MB from the other polymer additives. The second derivative spectrum of MB was measured at 304 nm while the third derivative was measured at 308 nm. At these wavelengths, the spectra of the other additives cross the zero line or are insignificant. The derivative spectrophotometric procedure was applied for MB determination in synthetic mixtures of polymer additives and in rubber samples.
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页码:909 / +
页数:9
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