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Ring-opening polymerization of L-lactide to cyclic poly(lactide) by zeolitic imidazole framework ZIF-8 catalyst

(2017) CHEMSUSCHEM. 10(21). p.4135-4139
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Abstract
The catalytic activity of ZIF-8 in the ring-opening polymerization of l-lactide without solvents or cocatalysts is presented for the first time. Two different synthetic strategies have been applied for synthesizing ZIF-8, either under solvothermal condition or by spray-drying procedure. Their catalytic activities are found to be correlating with the presence of open active sites in ZIF-8 structure. The structural defects that afford active acid and basic sites are supposed to cooperatively catalyze the reaction. ZIF-8 assembled by spray-drying technique, displays a superior catalytic activity at temperature of 160 degrees C, leading to the formation of high molecular weight cyclic polylactide. The ZIF-8 catalysts could be recycled and reused without any significant loss of catalytic activity.
Keywords
METAL-ORGANIC FRAMEWORKS, RAC-LACTIDE, ZWITTERIONIC POLYMERIZATION, SILSESQUIOXANE COMPLEXES, POLYLACTIDE MACROCYCLES, BIODEGRADABLE, POLYMERS, EXTERNAL SURFACE, ROOM-TEMPERATURE, SILICA, CYCLOPOLYMERIZATION, heterogeneous catalysis, metal-organic frameworks, polymerization, structural defects, zeolites

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Citation

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Chicago
Luo, Zhixiong, Somboon Chaemchuen, Kui Zhou, and Francis Verpoort. 2017. “Ring-opening Polymerization of L-lactide to Cyclic Poly(lactide) by Zeolitic Imidazole Framework ZIF-8 Catalyst.” Chemsuschem 10 (21): 4135–4139.
APA
Luo, Zhixiong, Chaemchuen, S., Zhou, K., & Verpoort, F. (2017). Ring-opening polymerization of L-lactide to cyclic poly(lactide) by zeolitic imidazole framework ZIF-8 catalyst. CHEMSUSCHEM, 10(21), 4135–4139.
Vancouver
1.
Luo Z, Chaemchuen S, Zhou K, Verpoort F. Ring-opening polymerization of L-lactide to cyclic poly(lactide) by zeolitic imidazole framework ZIF-8 catalyst. CHEMSUSCHEM. 2017;10(21):4135–9.
MLA
Luo, Zhixiong, Somboon Chaemchuen, Kui Zhou, et al. “Ring-opening Polymerization of L-lactide to Cyclic Poly(lactide) by Zeolitic Imidazole Framework ZIF-8 Catalyst.” CHEMSUSCHEM 10.21 (2017): 4135–4139. Print.
@article{8554290,
  abstract     = {The catalytic activity of ZIF-8 in the ring-opening polymerization of l-lactide without solvents or cocatalysts is presented for the first time. Two different synthetic strategies have been applied for synthesizing ZIF-8, either under solvothermal condition or by spray-drying procedure. Their catalytic activities are found to be correlating with the presence of open active sites in ZIF-8 structure. The structural defects that afford active acid and basic sites are supposed to cooperatively catalyze the reaction. ZIF-8 assembled by spray-drying technique, displays a superior catalytic activity at temperature of 160 degrees C, leading to the formation of high molecular weight cyclic polylactide. The ZIF-8 catalysts could be recycled and reused without any significant loss of catalytic activity.},
  author       = {Luo, Zhixiong and Chaemchuen, Somboon and Zhou, Kui and Verpoort, Francis},
  issn         = {1864-5631},
  journal      = {CHEMSUSCHEM},
  keywords     = {METAL-ORGANIC FRAMEWORKS,RAC-LACTIDE,ZWITTERIONIC POLYMERIZATION,SILSESQUIOXANE COMPLEXES,POLYLACTIDE MACROCYCLES,BIODEGRADABLE,POLYMERS,EXTERNAL SURFACE,ROOM-TEMPERATURE,SILICA,CYCLOPOLYMERIZATION,heterogeneous catalysis,metal-organic frameworks,polymerization,structural defects,zeolites},
  language     = {eng},
  number       = {21},
  pages        = {4135--4139},
  title        = {Ring-opening polymerization of L-lactide to cyclic poly(lactide) by zeolitic imidazole framework ZIF-8 catalyst},
  url          = {http://dx.doi.org/10.1002/cssc.201701438},
  volume       = {10},
  year         = {2017},
}

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