Grafted lignins

Other lignins can be reacted with this chemistry. Table 7 shows synthesis data for the preparation of poly(lignin-g-(1-amido-ethylene)) from several different lignins. Sample 1 is a kraft pine lignin grafted in a reaction coinitiated with sodium chloride. 

Table 12 Synthesis data of cationic lignin-graft copolymer ( lignin-g-2-propenamide-DMDAC )...

Table 13 The composition of Reaction Mixture Used to Make Lignin Graft Copolymers...

Table I. Lignins Grafted with Hydroperoxy/chloride Chemistry...

Table VII. The Composition of Reaction Mixtures Used Lignin Graft Copolymers to Make...

Reaction of the mesylated lignin prepared in step 1 (Fig. 1) with the polystyryl carbanion (living polystyrene) from step 2 (Fig. 2). The carbanion displaces the mesylate groups on the lignin in a nucleophilic displacement reaction with the formation of the polystyrene-lignin graft copolymer (Fig. 3). 

B Dewatering Data of Cationic Lignin Graft Copolymer with Methylsulfate Anion ... 

The extent of PO homopolymerization with respect to lignin grafting, was also determined and found to vary between 5 and 75wt%, the higher values being associated with the less reactive substrates. Thus, for example,... 

Mai C, Schormann W, Huttermann A et al (2002) The influence of laccase on the chemo-enzymatic synthesis of lignin graft-copolymers. Enzyme Microbial Technol 30 66—72... 

X. Liu, J. Wang, S. Li, X. Zhuang, Y. Xu, G. Wang, and F. Chu, Preparation and properties of UV-absorbent lignin graft copolymer films from lignocellulosic butanol residue, Ind. Crops Prod., 52, 633-641, 2014. 

Figure 18. Schematic chemical structure of polyurethanes derived from lignin-grafted PCL.

Methanolysis of Lignin-grafted Vinyl Acetate Polymers... 

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