CONDUCTOMETRIC DETERMINATION OF THE END GROUP IONIZATION IN ACRYLAMIDE AND ACRYLONITRILE POLYMERS INITIATED BY CARBOXYLIC-ACIDS

被引：17

作者：

ERBIL, C ^{[1
]}

USTAMEHMETOGLU, B ^{[1
]}

UZELLI, G ^{[1
]}

SARAC, AS ^{[1
]}

机构：

[1] TECH UNIV ISTANBUL,DEPT CHEM,ISTANBUL 80626,TURKEY

来源：

EUROPEAN POLYMER JOURNAL | 1994年 / 30卷 / 02期

关键词：

D O I：

10.1016/0014-3057(94)90152-X

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The end group analysis both for polyacrylamides and polyacrylonitriles initiated by Ce(IV) malonic acid, tartaric acid and citric acid redox systems was carried out by using conductometric titration. Carboxyl end groups of these polymers are determined by dissolving polyacrylamides in water, polyacrylonitriles in dimethylformamide and ethylene carbonate propylene carbonate (80/20 by weight) at 25-degrees and titrating with aqueous sodium hydroxide, alcoholic sodium hydroxide and tetrabutylammonium hydroxide, respectively. The number average molecular weight results are compared with the viscometric ones. It was found that these are in good agreement with each other. In addition to the experiments with conductometric titrations, calculations were made to find the ionization constant of carboxylic acid end groups in acrylamide and acrylonitrile polymers. For this purpose the Ostwald dilution law was used.

引用

页码：149 / 152

页数：4

共 18 条

[1] REDUCTION ACTIVATION - A NEW POLYMERISATION TECHNIQUE [J].