1989 Fiscal Year Final Research Report Summary
Structural Crystallization and Functionalization of Cellulose Derivatives Prepared in Non-agueous Cellulose Solvents
| Project/Area Number |
62470128
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
林産学
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| Research Institution | Kyoto University |
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Principal Investigator |
OKAMURA Keizo Kyoto Univ., Dept. of Wood Sci. & Tech., Professor, 農学部, 教授 (50026506)
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| Co-Investigator(Kenkyū-buntansha) |
FUJITA Minoru Kyoto Univ., Dept. of Wood Sci. & Tech., Assoc. Prof., 農学部, 助教授 (60026599)
TANIGUCHI Takashi Niigata Univ. Faculty of Education, Professor, 教育学部, 教授 (20126428)
AZUMA Jun-ichi Kyoto Univ., Dept. of Wood Sci. & Tech., Assoc. Prof., 農学部, 助教授 (80115782)
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| Project Period (FY) |
1987 – 1989
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| Keywords | Non-asqueous cellulose solvents / Cellulose derivatives / Two-dimensional NMR analysis / Polarized infrared spectroscopy / X-ray diffraction / Electron diffraction / Conformational analysis / Packing analysis |
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| Research Abstract |
Three kinds of cellulose esters (cellulose tripropionate, cellulose tributyrate and cellulose trivalerate) were investigated with respect to their molecular structure, chain conformation, packing analysis, structured crystallization and functionalization. The esters were prepared in non-aqueous cellulose solvents using ramie, Whatman and Avicel celluloses. The esters were fractionated with a Showdex gel permeation chromatography. The molecular weight was determined by-the sedimentation equilibrium centrifugal method. For molecular analysis of these esters, FT-MNR, C13-NMR and a two-dimensional NMR were applied, and all the carbon and the hydrogen atoms in the substituent groups were identified.
The X-ray diffraction and potential energy calculation methods were applied to the conformational analysis of the ester chains: while cellulose tripropionate forms a left-handed 3 fold screw symmetry, cellulose tributyrate and cellulose trivalerate form the two fold symmetry. The esters were structured crystallized in a mixed solvent forming a polymer single crystals. The structure of the single crystals were investigated with a selected area electron diffraction diagrams and the direction of the molecule and the growing habit were clearly elucidated.
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[Publications] Shuto, Y.; Okamura, K.; Azuma, J.; Tanaka, F.; Chanzy, H.: "A combined electron and X-ray diffraction study of cellulose tripropionate in "Cellulose and Wood - Chemistry and Technology" (C. Schuerch, ed.)." Wiley-Interscience, New York, U.S.A., pp.207-288, 1989.
Description
「研究成果報告書概要(欧文)」より
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[Publications] Shuto, Y.; Okamura, K.; Azuma, J.; Tanaka, F.; Chanzy, H.: "X-ray and electron diffraction study of some cellulose derivatives in "Cellulose - Structural and Functional Aspects" (J.F. Kennedy, G.O. Phillips, P.A. Williams, eds.)." Ellis Horwood, Chichester, England, pp.283-288, 1989.
Description
「研究成果報告書概要(欧文)」より
