Cellulose triacetate segments

Cellulose triacetate segments Cellulose triacetate, supplied by Eastman Kodak Company of Kingsport, TN, was depolymerized in accordance with a method by Steinmann (15), and this was NCO capped by reaction with toluene diisocyanate as reported previously (14). A CTA segment with an average degree of polymerization of 12 (corresponding to an M of... 

Segmented block copolymers have been demonstrated by degrading cellulose triacetate and coupling it to low-molecular-weight polyesters or polyethers capped with isocyanate end groups and spinning from methylene chloride to make Spandex type elastomeric fibers [111,112]. 

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