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Configurational statistics of polysaccharide chains. Part III. Linear β‐(1 → 4′) xylan and mannan
Author(s) -
Yathindra X.,
Rao V. S. R.
Publication year - 1971
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.360101010
Subject(s) - mannan , xylan , chemistry , cellulose , degree of polymerization , polysaccharide , polymerization , crystallography , organic chemistry , polymer
The characteristic ratio C N = 〈 r 2 〉 0 / Nl v 2 of the β‐ D (1 → 4′)‐linked polysaccharides xylan and mannan has been computed as a function of the angle τ at the bridge oxygen atom and the degree of polymerization N . The calculated values of the characteristic ratio C N are very high relative to their free rotational dimensions. The characteristic ratio of these polysaecharides converges to the asymptotic value at low degree of polymerization at higher τ values. The low values of the calculated characteristic ratio of xylan compared to cellulose and mannan for the same τ value indicate that the former is more flexible and assumes a compact configuration. A pronounced difference in the values of the characteristic ratio C N of cellulose and mannan has also been observed lower τ angles (<120°). On the other hand, nearly the same values of C N have been obtained at higher τ angles (120°–125°), which suggests that, cellulose and mannan may have similar configuralons in certain solvents.