学術雑誌論文

学術雑誌論文

text

Polymer Journal.41(3) p.201-p.207

Solution Properties of Amylose Tris(Phenylcarbamate) : Local Conformation and Chain Stiffness in 1,4-Dioxane and 2-Ethoxyethanol

Nature Publishing Group

英語

text

2009-01

https://doi.org/10.1295/polymj.PJ2008233

http://www.nature.com/pj/journal/v41/n3/abs/pj200934a.html

Light and small-angle X-ray scattering, sedimentation equilibrium, viscosity, circular dichroism, and infrared absorption measurements have been made on 1,4-dioxane (DIOX) and 2-ethoxyethanol (2EE) solutions of seven amylose tris(phenylcarbamate) samples ranging in molecular weight from 2 x 10^4 to 3 x 10^6. Analyses of gyration radius, scattering function, and intrinsic viscosity data in terms of the wormlike chain model yield Kuhn segment lengths of 22 ± 2 nm and 16 ± 2nm in DIOX and 2EE, respectively, and a contour length per residue of 0.33 ± 0.02 nm in both, showing that the amylose derivative chain has high stiffness and a contour length slightly shorter than the known value 0.37-0.40 nm for amylosetriesters in the crystalline state. These results are consistent with the intramolecular hydrogen bonding between the C=0 and NH groups of the neighbor repeating units detected by infrared absorption and also with the locally regular (or helical) conformation indicated by circular dichroism.

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Solution Properties of Amylose Tris(Phenylcarbamate) : Local Conformation and Chain Stiffness in 1,4-Dioxane and 2-Ethoxyethanol

Nature Publishing Group

英語

2009-01

Polymer Journal

41

3

201

207

00323896

https://doi.org/10.1295/polymj.PJ2008233

https://hdl.handle.net/11094/25931

http://www.nature.com/pj/journal/v41/n3/abs/pj200934a.html