LIGNIN DERIVATIVE, LIGNIN SECOND DERIVATIVE, LIGNIN RESIN COMPOSITION, PREPREG, AND COMPOSITE STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide: a lignin derivative and a lignin second derivative that excel in reactivity and excel in meltability or solvent solubility; a lignin resin composition including the same and excellent in curability; a prepreg capable of producing a composite structure excellent in heat resistance or mechanical properties; and the composite structure comprising curing the prepreg.

SOLUTION: The lignin derivative is obtained by decomposing biomass, and when the lignin derivative is subjected to1H-NMR analysis, in the spectrum of the obtained chemical shift, the integration value of the peak belonging to an aromatic proton is 15-50% of the integration of the peak belonging to an aliphatic proton. Moreover, the lignin second derivative comprises introducing a reactive group like an epoxy group into the lignin derivative.

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