Affiliation:
1. Southern Regional Research Laboratory, New Orleans, Louisiana
Abstract
The relative swelling of cotton in 67 organic liquids and aqueous solutions of 14 inorganic compounds was evaluated by observing the number of revolutions of a singles yarn of Iquitos variety during untwisting in a 3-min post-immersion interval. Aqueous dilutions of the lower alcohols, two organic acids, acetone, and ethanolamine were also tested. The yarn was used in the unpurified state, after scouring and after scouring and mercerization. The relative swelling of cotton in 17 of the liquids determined by this untwisting technique was in qualitative agreement with values found by microscopi cal measurements of changes in width of fibers taken from the scoured and mercerized yarn. Qualitative agreement with values reported in the literature for measurement of swelling by other techniques was also established. The effects of some experimental variables wrere investigated.
Subject
Polymers and Plastics,Chemical Engineering (miscellaneous)
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