✦ LIBER ✦

Structure of cellulose II

✍ Scribed by Regulus E. Hunter; Neville E. Dweltz

Publisher: John Wiley and Sons
Year: 1979
Tongue: English
Weight: 596 KB
Volume: 23
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1979.070230123

No coin nor oath required. For personal study only.

✦ Synopsis

A reduced unit cell derived from the presently accepted unit cell and a new parallel chain arrangement is proposed for cellulose I1 (regenerated cellulose). In the present structure, all the cellulose chains are identical and there is only one chain passing through each unit cell. The intensity data for all reflections with d spacings greater than 1.747 8, have been calculated and were found to be in good agreement with the corresponding observed x-ray intensities. The calculated agreement factor is R = 0.50. Two intrachain hydrogen bonds parallel to the fiber axis and one interchain hydrogen bond perpendicular to the fiber axis stabilize the structure. The hydrogen bonding network is in fair agreement with infrared dichroic data, and the chain arrangement conforms to stereochemical criteria. No short contacts are observed. The parallel chain is also compatible with the structure of cellotetraose and the accepted hypothesis of cellulose biosynthesis, as well as the latest parallel structure for Valonia.

📜 SIMILAR VOLUMES

Structure of cellulose II hydrate

✍ David M. Lee; John Blackwell 📂 Article 📅 1981 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 639 KB

## Abstract A hydrate of cellulose II can be formed by swelling Fortisan fibers in hydrazine and then washing in water. The hydrate is stable at 93% relative humidity and has a monoclinic unit cell with dimensions __a__ = 9.02 Å, __b__ = 9.63 Å, __c__ = 10.34 Å, and γ = 116.0°; the space group is _

Structure of a cellulose II-hydrazine co

Structure of a cellulose II-hydrazine complex

✍ David M. Lee; John Blackwell; M. H. Litt 📂 Article 📅 1983 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 929 KB

## Synopsis The structure of a crystalline cellulose 11-hydrazine complex has been determined by x-ray diffraction methods as part of an investigation of cellulose-solvent interaction. The complex studied was that formed when Fortisan fibers were swollen in hydrazine and then vacuumdried. The unit

Models of cellulose physical structure f

Models of cellulose physical structure from the viewpoint of the cellulose I → II transition

✍ Hans-Peter Fink; Burkart Philipp 📂 Article 📅 1985 🏛 John Wiley and Sons 🌐 English ⚖ 699 KB

Supermolecular structure of linters cellulose at the cellulose 1-11 phase transition is investigated by wide-angle X-ray scattering (quantitative phase analysis, degree of crystallinity by the method of Ruland and Vonk, and lateral crystallite sizes via peak separation by Pearson VII functions). A s

Structure of amorphous cellulose

✍ T. Paakkari; R. Serimaa; H.-P. Fink 📂 Article 📅 1989 🏛 John Wiley and Sons 🌐 English ⚖ 375 KB 👁 1 views

Preparation, structure, and properties o

Preparation, structure, and properties of montmorillonite/cellulose II/natural rubber nanocomposites

✍ Roberta M. Mariano; Paulo Henrique de S. Picciani; Regina C. R. Nunes; Leila L. 📂 Article 📅 2010 🏛 John Wiley and Sons 🌐 English ⚖ 634 KB

Cellulose bound chlorophenols II: Prepar

Cellulose bound chlorophenols II: Preparation and characterization of phenyloxycarbonylpentanoyl celluloses dependence of substitution on chlorophenol structure

✍ Peter Mair; Müfit Bahadir; Friedhelm Korte 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 365 KB