AATCC 82 PDF download

Fluidity of Dispersions of Cellulose from Bleached Cotton Cloth

AATCC 82 – Fluidity of Dispersions of Cellulose from Bleached Cotton Cloth

1.Purpose and Scope

1.1The test procedures in this test method are applicable to bleached, unfinished cotton cloth.The fluidity of a dispersion of bleached cellulose fibers in cupriethylene diamine solvent is a sensitive measure of the degradation of the cellulose resulting from the action of acids, alkalis, oxidizing or reducing agents.It is therefore useful in determining the completeness of the bleaching treatment to which the cloth has been subjected, as well as the effect of chemical treatments on the tensile strength of the cloth. (Fluidity of dispersions in cuprammonium hydroxide has been dropped from this test method.)

2.Principle

2.1The length of chain of cellulose molecules is decreased when treated with acid, alkali, oxidizing or reducing agents, etc.The severity of the treatment determines the extent of the shortening of the cellulose chain and the fluidity, or ease of flow, of a dispersion of the cellulose in the solvents.