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A composite of poly(ethylene oxide) (PEO) and lignin (Lg) was prepared and characterized for its utility as an ultraviolet (UV) absorbing material. Due to the extensive UV absorption and excellent oxidation‐resistance of Lg, the formation of hydrogen bonds between the Lg particles and the PEO molecular segments renders the Lg particles well‐dispersed in the PEO matrix. PEO/Lg composites with different...