HE Jing, DAI Lin, LI Dan, SHEN Yue.. Preparation and degradation of cellulose-polylactide grafted copolymer[J]. Journal of Beijing Forestry University, 2014, 36(2): 139-144.
Citation:
HE Jing, DAI Lin, LI Dan, SHEN Yue.. Preparation and degradation of cellulose-polylactide grafted copolymer[J]. Journal of Beijing Forestry University, 2014, 36(2): 139-144.
HE Jing, DAI Lin, LI Dan, SHEN Yue.. Preparation and degradation of cellulose-polylactide grafted copolymer[J]. Journal of Beijing Forestry University, 2014, 36(2): 139-144.
Citation:
HE Jing, DAI Lin, LI Dan, SHEN Yue.. Preparation and degradation of cellulose-polylactide grafted copolymer[J]. Journal of Beijing Forestry University, 2014, 36(2): 139-144.
Cellulose-graft-poly ( L-lactide ) ( cellulose-g-PLLA ) and cellulose-graft-poly ( DL-lactide )
( cellulose-g-PDLLA ) were successfully prepared via ring-opening polymerization by using 4-dimethylaminopyridine (DMAP) as an organic catalyst in an ionic liquid 1-allyl-3-methylimidazolium
chloride (AmimCl). The structure and morphology of the polymer were characterized by nuclear magnetic
resonance (NMR), differential scanning calorimetry measurement (DSC) and wide-angle X-ray powder
diffraction (WAXD), showing the glass transition temperature (Tg) of these two polymers were 45.6 and
40.3 0 C, respectively, and all of them were amorphous state. The results indicated that materials with
low degree of crystallinity showed higher degradability. In contrast, the acid, enzyme, alkaline,
phosphate buffered saline ( PBS) and H2 O degradated material decreased the rate of polymer
degradation. In addition, high levels of graft degree of this material resulted in a decrease in degradation.
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