| 초록 |
Lignin is the abundant aromatic biopolymer in the world, and appropximately 70 billion tons are generated anually. Lignin has potential as thermosetting plastic, because it has highly cross-linked aromatic and aliphatic hydroxyl groups. Lignin can be utilized in versatile application through chemical modification that can increase hydroxyl reactivity. In this study, the biopolyester was synthesized using oxypropylated lignin. The lignin/propylene oxide ratio was investigated, and the oxypropylated lignin and dicarboxylic acid were polymerized via polycondensation reaction in the presence of acidic catalyst. The characteristics of biopolyol and polyester were studied using fourier transform infrared (FT-IR), gel permeation chromatography (GPC), and thermogravimetric analyzer/differential canning calorimetry (TGA/DSC). |
