Influence of lactic acid on the catalytic performance of MDABCO for ring-opening polymerization of l-lactide / Luo Zhixiong [et al.]
Уровень набора: Applied Catalysis A: GeneralЯзык: английский.Резюме или реферат: 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..Примечания о наличии в документе библиографии/указателя: [References: p. 20-21 (42 tit.)].Аудитория: .Тематика: электронный ресурс | труды учёных ТПУ | Ring-opening polymerization | polylactide | MDABCO MOFs | lactic acid | heterogeneous catalysis | полимеризация | полилактиды | молочная кислота | гетерогенный катализ Ресурсы он-лайн:Щелкните здесь для доступа в онлайнTitle screen
[References: p. 20-21 (42 tit.)]
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.
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