| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO)) |
| 권호 |
44권 1호 |
| 발표분야 |
Korea-Japan Joint Symposium: Fundamental Polymer Science for Future Technology (영어발표) |
| 제목 |
Syntheses of Ester Derivatives from Natural Polysaccharides and Their Application as Bio-based Plastic Material |
| 초록 |
Polysaccharides are one of the most abundant natural polymers in the world, are not originally thermoplastic due to their inter- and intra-molecular hydtogen bondings derived from hydtoxyl groups in the polymer chain. In the present study, polysaccharide alkyl esters having different chain lengths (C2-C12) were synthesized to give them thermoplasticity, from xylan, glucomannan, curdlan, and pullulan. The complete esterification was carried out in carboxylic acid/trifluoro acetic anhydride mixed system. The chemical structures were characterized by NMR and GPC analyses. The esters from all polysaccharides formed transparent cast-films or thermo-pressed films. Their tensile properties were dependent on the alkyl chain length. The glass transition temperature of the esters decreased from ca. 180 ℃ for acetate to ca. 60 ℃ for laurate with increase in chain length. Specific characteristic of each esters and their possibility as plastic materials are proposed and discussed. |
| 저자 |
Yukiko Enomoto, Tadahisa Iwata
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| 소속 |
The Univ. of Tokyo |
| 키워드 |
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| E-Mail |
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