Poisson's ratio of cellulose Iβ and cellulose II

Poisson's ratios of cellulose Iβ and cellulose II were determined for purified ramie and mercerized samples by X-ray diffractometry. Poisson's ratio was 0.38 for [200]/[004] of cellulose Iβ and 0.30 for [200]/[004] and 0.46 for [110]/[004] of cellulose II. The smaller [200]/[004] Poisson's ratio for cellulose II could be ascribed to closer intermolecular association through hydrogen bonding and van der Waals forces. Poisson's ratio for [11¯0]/[004] of cellulose II was estimated to be negative. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 1206–1211, 2004

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