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7456784 
Book/Book Chapter 
Chapter 7 - Capitalizing on lignin and tannin value: their chemical reactivity and their potential 
Hagiopol, C 
2021 
Elsevier 
Natural Polyphenols from Wood 
183-258 
The diversity of natural polyphenols’ chemical structure opens the possibility of numerous chemical reactions. Chemical structure diversity is responsible for potential parallel reactions and lower yields. Both functionalization (polymer analogous reactions) and molecular weight alteration are possible. The reduction of both molecular weight and oxygen content is performed to make better fuels. Heavy hydrogenolysis is required to make hydrocarbons miscible with gasoline. Another option to make new products is to preserve the macromolecular architecture of the natural polyphenols from wood. By keeping the molecular weight unchanged and modifying the natural polyphenols’ functionalities, new products with spectacular changes in macromolecule properties are obtained. Their solubility, reactivity, miscibility with other polymers can be tailored. Some reactions may require the purification of natural polyphenol in advance. 
Amination; Biodegradation; Complex formation; Condensation; Depolymerization; Esterification; Etherification; Functionalization; Glyoxalation; Grafting; Hydrogenation; Nanoparticles; Oxidation; Polycondensation; Polyelectrolytes; Polyphenols association; Sulfonation 
Hagiopol, Cornel