セルロースアセテート-ポリ乳酸系グラフト化物の合成と特性評価

概要

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Cellulose acetate-graft-poly(lactic acid)(CA-g-PLA) copolymers were successfully synthesized by ring-opening graft copolymerization of L-lactide onto CA backbone with LiCl as catalist, in several different reaction conditions. On the basis of ^1H NMR spectral data, the values of molar substitution (MS), an avarage number of introduced lactyl units per glucopyranose residue of CA, were estimated. It was found that MS values of graft copolymers varied with changes in reaction conditions. Thermal transition behavior of CA-g-PLA was also investigated by differential scanning calorimetry. All CA-g-PLAs gave single glass transition temperature, which was depressed sharply from that of the original CA.
2012-03-01