The redox system consisting of ammonium persulfate and sodium bisulfite was used as initiator, N,N‐dimethylacrylamide (DMAA) and γ‐methacryloxypropyl trimethoxy silane (KH570) were grafted onto sodium lignosulfonate (LS) in aqueous solution as reaction monomers, and a novel LS/KH570/DMAA graft copolymer filtrate reducer was synthesized. The structure of the copolymer was characterized by Fourier transform...
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