TY - JOUR
T1 - Influence of lactic acid on the catalytic performance of MDABCO for ring-opening polymerization of L-lactide
AU - Luo, Zhixiong
AU - Chaemchuen, Somboon
AU - Zhou, Kui
AU - Gonzalez, Andres Alvarado
AU - Verpoort, Francis
PY - 2017/9/25
Y1 - 2017/9/25
N2 - A series of metal organic frameworks (MOFs) MDABCO (M = Co, Ni, Cu, Zn; DABCO = 1,4-diazabicyclo[2.2.2]octane) are utilized as catalysts for the bulk ring-opening polymerization of L-lactide. The catalytic activity varies in the order CuDABCO, NiDABCO < ZnDABCO, CoDABCO. By adding lactic acid, we unexpectedly observed enhanced catalytic activity. The combined use of lactic acid and ZnDABCO during polymerization results in a highly active polymerization system, along with the gradual change of MOFs structure caused by an increased acid concentration. Compared to related homogeneous fragments, such as zinc nitrate and 1,4-diazabicyclo[2.2.2]octane, ZnDABCO is found to afford highly isotactic polylactide, which would be ascribed to the unique structural properties of MOFs.
AB - A series of metal organic frameworks (MOFs) MDABCO (M = Co, Ni, Cu, Zn; DABCO = 1,4-diazabicyclo[2.2.2]octane) are utilized as catalysts for the bulk ring-opening polymerization of L-lactide. The catalytic activity varies in the order CuDABCO, NiDABCO < ZnDABCO, CoDABCO. By adding lactic acid, we unexpectedly observed enhanced catalytic activity. The combined use of lactic acid and ZnDABCO during polymerization results in a highly active polymerization system, along with the gradual change of MOFs structure caused by an increased acid concentration. Compared to related homogeneous fragments, such as zinc nitrate and 1,4-diazabicyclo[2.2.2]octane, ZnDABCO is found to afford highly isotactic polylactide, which would be ascribed to the unique structural properties of MOFs.
KW - Heterogeneous catalysis
KW - Lactic acid
KW - MDABCO MOFs
KW - Polylactide
KW - Ring-opening polymerization
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U2 - 10.1016/j.apcata.2017.08.007
DO - 10.1016/j.apcata.2017.08.007
M3 - Article
AN - SCOPUS:85027972399
VL - 546
SP - 15
EP - 21
JO - Applied Catalysis A: General
JF - Applied Catalysis A: General
SN - 0926-860X
ER -