Abstract

A method was developed for the preparation of N-2-sulfoethylated polyaminostyrene (SEPAS) by gel synthesis with a degree of substitution up to 1.2. The composition and structure of the products of polymer-analogous transformations were characterized using elemental analysis and FT-IR spectroscopy. It was found that an increase in the degree of sulfoethylation decreases the basicity of amino groups. This leads to an increase in the selectivity coefficient K_Ag(I)/Cu(II) in an ammonium acetate buffer solution in the pH range 5.5–6.0, which makes it possible to use SEPAS for the selective extraction of silver(I) from solutions of complex composition. The degree of sulfoethylation does not affect the rate at which the sorption equilibrium is established.

中文翻译：

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聚氨基苯乙烯的磺乙基化程度对其酸碱性和与过渡金属离子相互作用特异性的影响

摘要

开发了通过取代度高达1.2的凝胶合成制备N -2-磺乙基化聚氨基苯乙烯（SEPAS）的方法。使用元素分析和FT-IR光谱对聚合物类似转化产物的组成和结构进行表征。已经发现，磺乙基化程度的增加降低了氨基的碱性。这导致pH范围在5.5-6.0的醋酸铵缓冲溶液中的选择性系数K _{Ag（I）/ Cu（II）增加}，这使得使用SEPAS选择性地从中提取银（I）成为可能。复杂组成的解决方案。磺乙基化程度不影响建立吸附平衡的速率。