Molecular Weight Dependence of Tensile Properties of Ramie and Linen Fibers
2001
Miyake, Hajime | Nagura, Masanobu
This study examines the dependence of ramie and linen tensile properties on the molecular weight of cellulose as a function of moisture absorption. The influence of the crystalline region and molecular weight on tensile properties is investigated using mercerized and acid hydrolyzed cotton fibers. No influence of the crystalline region on ramie and linen tensile properties is detected, and the effects of moisture regain on the tensile strength and elongation of ramie and linen fibers decrease with decreasing molecular weight. The slope in the plot of tensile properties versus moisture regain becomes negative when the molecular weights of ramie and linen are below about 1.22 X 10⁵ and 0.99 X 10⁵, respectively. Changes in tensile strength and elongation with moisture absorption depend mainly on the number of molecular chain ends in the amorphous region.
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