Synthesis and Study of Graft Copolymers of Carbon Humic Acids with Vinyl Monomers
A. S UTEGENOVA AND Z. G. AKKULOVA
Institute of Organic Synthesis and Coal Chemistry, National Academy of Sciences of Republic Kazakhstan, Ul. Alikhanova 1, Karaganda 470061 (Kazakhstan)
E-mail: akkul@inbox.ru
Pages: 467-471
Abstract
A potentiality has been disclosed to obtain new types of natural/synthetic polymers with the use of the radical grafting method on the basis of humic acids (HA) that have been extracted from wastage of coal mining. Conditions for obtaining graft copolymers of HA with vinyl monomers are described. An assumption has been made about the inhibiting effect of radical centres in aromatic system of HA on processes of the inoculation of vinyl monomers to them. It has been demonstrated that modification of HA and coal matter by polymers makes it possible to enrich their functional composition with new oxygen-containing functional groups. It has been found that cation-exchange capacity of the received coal and humic copolymers increases with an increased number of acid groups in their composition and with the ionisation degree in a series from coal to its copolymers and from HA to their modified forms. The sorption exchange capacity of the new derivates that has been investigated in relation to ions of sodium, copper, and nickel is 1.1
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