| 摘要 |
1,217,302. Shaped cation-exchange copolymeric articles. V. A. KARGIN, E. P. CHERNEVA, T. D. IGNATOVICH, N. N. TUNITSKY, and T.N. TOROPTSEVA. 10 June, 1969, No. 29248/69. Heading C3P. A shaped cation-exchange material e.g. a film or fibre formed from a copolymer of an alkali metal salt of vinyl sulphonic acid, e.g. sodium vinyl sulphonate, and another ethylenically unsaturated monomer, e.g. acrylic acid, is subjected to treatment with high energy electrons. The resulting material may be treated with a solution of a heavy metal salt e.g. to effect orientation and then with a mineral acid e.g. HCl or H 2 SO 4 . The latter treatment may be a prolonged simple chemical treatment or a shorter electrochemical treatment. |
