CELLULOSE is Nature's strong material. It is the chief constituent of cotton flax and wood. Wood can be turned into sugars by treatment with hydrochloric acid Bergius process) and by certain termites; horses and cows break down the cellulose in grass into sugar before digesting it. So it is not surprising that the cellulose polymer is built up of what are practically molecules of a glucose (“Barley Sugar”). Each β glucose unit is twisted about its axis through 180 deg.; the combination of two such units makes up that is called a cellulose unit which has the structure shown in Fig. 2. The cellulose polymer is a long, straight chain made up from these cellobiose units, and each chain probably contains about 70 such units.
de Bruyne, N.A. (1940), "Solid Organic Materials: A Survey of the Characteristics of a New Class of Materials for Use in Engineering", Aircraft Engineering and Aerospace Technology, Vol. 12 No. 6, pp. 177-180. https://doi.org/10.1108/eb030654
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