Abstract
This study developed Kuhn-Mark-Houwink-Sakurada (KMHS) equations for kraft lignin, based on the absolute molecular weight characterized with low-angle laser light scattering. The KMHS exponential factors of kraft lignin were found to be 0.11, 0.13 and 0.23 in dimethylformamide (DMF) at 318.2 K, in DMF at 350.7 K and in 0.5 N sodium hydroxide at 303.2 K, respectively. Lignin molecules in solution are approximately spherical particles and slightly solvated with solvent.
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