Determinations of accessibility and total crystalline content have been made for a number of regenerated cellulose fibres. Moisture sorption has been used as a measure of cellulose accessibility, and total crystalline content has been estimated from density measurements. It is suggested that the results may be interpreted as showing differences in the average cross‐sectional area of crystalline regions. An attempt is made to correlate these differences with the properties of the fibres produced by various methods of manufacture.

No abstract