Mai, CarstenCarstenMaiMajcherczyk, AndrzejAndrzejMajcherczykHuttermann, A.A.Huttermann2018-11-072018-11-072000https://resolver.sub.uni-goettingen.de/purl?gro-2/46388Chemo-enzymatic initiation of graft copolymerization of acrylic compounds onto different technical lignosulfonates (LS) was compared to a Fenton-like system (ferrous ion, t-BHP). The enzyme tested was a phenoloxidase laccase (EC 1.10.3.2) from the white rot basidomycete Trametes versicolor. Most applied lignins were successfully grafted, resulting in a polymer yield of more than 90%. The effect of initiator concentration and the lignin/monomer ratio on the yield and (M) over bar(w) of enzymatically grafted polymers were studied. The homopolymer proportion in the enzymatically produced grafts of Ca-LS and acrylic acid was 5 to 6x lower than those initiated by the Fenton-like reagent; no such differences were observed for Na-LS. (C) 2000 Elsevier Science Inc. All rights reserved.journal_article10.1016/S0141-0229(00)00214-3000087880300023