S. Starodubtsev, V. Kabanov
1980
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Journal
Polymer Science U.s.s.r.
Abstract
A study was made of main nucleophilic properties of mercapto-groups contained in poly-4-vinylpyridine derivatives N-alkylated using dimethylsulphate, ethyl bromide and bromacetic acid. It was shown that the value of pKa of mercapto-groups of copolymers is reduced by two-three units, compared with the pKa value of low molecular weight analogues and is not greatly affected by the chemical structure of copolymers. A reduction in the degree of quaternization of copolymers and replacement of substituents containing carboxyl by alkyl groups markedly increase the reactivity of mercapto-groups of copolymers in reactions with n-nitrophenylacetate and 3-nitro-4-acetoxy benzoic acid.