Triacetate or cellulose triacetate, (CTA or TAC) is a chemical compound produced from cellulose and a source of acetate esters, typically acetic anhydride. Triacetate or cellulose triacetate (CTA) synthetic fiber is regenerated by transformation of natural polymers in which at least 92 % of the hydroxyl groups are acetylated cellulose.
Triacetate is derived from cellulose by acetylating cellulose with acetic acid and/or acetic anhydride. Acetylation converts hydroxyl groups in cellulose to acetyl groups, which renders the cellulose polymer much more soluble in organic solvents. The cellulose triacetate is dissolved in a mixture of dichloromethane and methanol for spinning. As the filaments emerge from a spinneret, the solvent is evaporated in warm air, in a process known as dry spinning, leaving a fibre of almost pure triacetate.
Examples of chemical formula:
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| cellulose triacetate chemical structure. |
Where X = H or CH3CO and the degree of esterification is between 2,76 and 3.
Triacetate fabric has good elasticity and is resilient to wrinkles, mold, mildew, and insects. Easily washed and dried, it is often used for knitted fabrics. Triacetate is synthetic fabric made from spun filaments of cellulose. Material function as a substitute for silk in less expensive garments, and similar care must be taken when washing these delicate fabrics.
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