Abstract
Field-opened American cotton fibers were treated with acrylonitrile after impregnation with aqueous sodium hydroxide. By this treatment the water absorbency and the amount of bound water as determined by DSC were increased and approached those of never-dried cotton. As for tensile strength, the increase in dry strength was higher than that of wet strength. On DSC cooling curves peak II, ascribable to freezable bound water, was observed as a small shoulder for field-opened and mercerized cotton fibers. However, this peak disappeared after the acrylonitrile treatment. Those treated fibers showed a nearly circular cross-sectional shape. Lumen and convolution could hardly be observed.
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