Physical Properties of Chemically Modified Cottons

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Abstract
Yarns from six cottons selected for their widely different inherent fiber characteristics were partially carboxymethylated to a degree of substitution averaging about 0.125 while held at their original kngth. Moisture regain, linear density, breaking load, and elon gation at break, measured on the fibers and/or yarns, were increased by the modification. Fiber cellulose density and length decreased. Samples of the different cotton varieties were found to differ in their response to the treatment with interrelationships existing between the linear density, degree of substitution, and moisture regain. Changes in fiber properties in the caustic treatments of cottons, such as carboxymethylation and mer cerization, were found to be similar when the tensional conditions during treatment were essentially equal.