Abstract
Yarns from six cottons selected for their widely different fiber characteristics were partially aminized to a degree of substitution averaging about 0.043. Yarns were allowed to contract in length during the chemical reaction but were placed under a small load during the washing and souring processes. Moisture regain and linear density were increased by the treatment. Modified cellulose density and fiber length were decreased. The changes in tenacity and modulus showed inconsistencies among samples of different cottons, with trends similar to those found in mercerization. Decreases in tenacity were found for the fiber bundles but increases for the yarns. The single fibers showed no appreciable changes in tenacity. Secant moduli of fibers and yarns were intermediate , between those of slack and normal length mercerization.
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