The effect of lignin nanoparticles (LNPs) on the crystallization kinetics poly(ethylene oxide) (PEO) is examined. Lignin from spruce and ionic isolation was used to prepare LNPs with a number-averaged diameter 85 nm (with relatively large polydispersity) by an ultrasonication method. PEO-based nanocomposites four different LNP contents (5, 10, 15, 20 wt %) were prepared subject isothermal nonis...