Abstract
The isothermal melt crystallization kinetics of fully biodegradable poly(ethylene succinate) (PES)/cellulose nanocrystals (CNC) composites was studied in this research. Due to the efficient nucleating agent effect, the crystallization rate of PES was remarkably enhanced by low loadings of CNC; consequently, the composites displayed shorter crystallization half-time and greater nucleation density than neat PES. Through the self-nucleation and nonisothermal melt crystallization studies, the nucleation efficiency values of CNC were quantitively evaluated in PES/CNC composites. Despite CNC loading, the nucleation efficiency exceeded 50%. With increasing the CNC loading from 0.25 to 1 wt%, both the crystallization rate of the composites and the nucleation efficiency of CNC at different loadings first increased, reached a maximum, and then decreased, displaying the CNC loading dependence. Such dependence was attributed to the different dispersion states of CNC in the composites.
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