Abstract
AbstractThe facile dissolution of cellulose via its reversible reaction with CO2in the presence of 1, 8‐diazabicyclo[5.4.0]undec‐7‐ene (DBU) in DMSO provides a new efficient platform for derivatization of cellulose, on which serials of grafted poly‐(ϵ‐caprolactone) copolymers were successfully prepared through ring‐opening polymerization (ROP) under mild conditions without adding external catalysts. The strategy allows the preparation cellulose‐graft‐poly‐(ϵ‐caprolactone) copolymers with a molar substitution (MSPCL) of poly‐(ϵ‐caprolactone) ranging 2.29 to 8.01 under mild conditions. The results indicated that DBU acted as not only an important reagent to achieve cellulose dissolution, but it also acted as an organocatalyst for the subsequent ROP process. The grafting content of the prepared copolymers were characterized by1H NMR. Their physiochemical structures were determined by NMR, FTIR, GPC and WXRD, and thermal properties were studied by TGA and DSC.
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