Journal
MACROMOLECULES
Volume 50, Issue 2, Pages 515-522Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.macromol.6b02439
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Funding
- National Natural Science Foundation of China [21274015, 21574016]
- Program for Liaoning Excellent Talents in University [LJQ2015025]
- Chang Jiang Scholars Program from Ministry of education, People's Republic of China [T2011056]
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The highly isoselective ring-opening polymerization (ROP) of racemic lactide is regarded as a valuable strategy for the synthesis of stereocomplex polylactide. In the present contribution, we report the novel yttrium bis(phenolate) ether complexes for catalyzing ROP of raceniic lactide in high activity (TOP) aria,excellent isotactic selectivity (P-1) (P-i = 0.90, TOP = 120 h(-1) at -15 degrees C; P = 0.84, TOF = 2280 h(-1) at 25 degrees C). Kinetic and computational studies provide a fundamental understanding of the steteocontrol mechanism governing polymerization reactions mediated by yttrium catalysts.
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