A closer look at ε-caprolactone polymerization catalyzed by alkyl aluminum complexes: the effect of induction period on overall catalytic activity

2015 ◽  
Vol 44 (26) ◽  
pp. 11763-11773 ◽  
Author(s):  
Hsi-Ching Tseng ◽  
Michael Y. Chiang ◽  
Wei-Yi Lu ◽  
Yen-Jen Chen ◽  
Cheng-Jie Lian ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Induction Period ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Total Conversion ◽  
Aluminum Complexes ◽  
Conversion Time

Previous studies on the ring-opening polymerization of ε-caprolactone using structurally related aluminum complexes as pre-catalysts showed inconsistent trends in the total conversion time.

scholarly journals Investigation of the dinuclear effect of aluminum complexes in the ring-opening polymerization of ε-caprolactone

RSC Advances ◽  
2017 ◽  
Vol 7 (31) ◽  
pp. 18851-18860 ◽  
Author(s):  
Chiao-Yin Hsu ◽  
Hsi-Ching Tseng ◽  
Jaya Kishore Vandavasi ◽  
Wei-Yi Lu ◽  
Li-Fang Wang ◽  
...  
Keyword(s):  
Schiff Base ◽  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Schiff Base Ligands ◽  
Aluminum Complexes ◽  
Salen Ligands

Al complexes bearing hydrazine-bridging Schiff base ligands showed the best catalytic activity, approximately 3- to 11-fold higher than that of dinuclear Al complexes bearing Salen ligands and mononuclear Al complexes bearing Schiff base ligands.

Enhanced Catalytic Activity of Aluminum Complexes for the Ring-Opening Polymerization of ε-Caprolactone

2017 ◽  
Vol 56 (14) ◽  
pp. 7998-8006 ◽  
Author(s):  
Someswara Rao Kosuru ◽  
Ting-Han Sun ◽  
Li-Fang Wang ◽  
Jaya Kishore Vandavasi ◽  
Wei-Yi Lu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Aluminum Complexes

Organocalcium Compounds with Catalytic Activity for the Ring-Opening Polymerization of Lactones

2003 ◽  
Vol 2003 (18) ◽  
pp. 3432-3439 ◽  
Author(s):  
Matthias Westerhausen ◽  
Stefan Schneiderbauer ◽  
Alexander N. Kneifel ◽  
Yvonne Söltl ◽  
Peter Mayer ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization

Synthesis and characterization of neutral and cationic aluminum complexes supported by a furfuryl-containing aminophenolate ligand for ring-opening polymerization of ε-caprolactone

2018 ◽  
Vol 42 (11) ◽  
pp. 8374-8383 ◽  
Author(s):  
Jiraya Kiriratnikom ◽  
Sucheewin Chotchatchawankul ◽  
Setsiri Haesuwannakij ◽  
Supavadee Kiatisevi ◽  
Khamphee Phomphrai
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Aluminum Complexes

Mononuclear aluminum complexes supported by novel furfuryl-containing aminophenolate ligand are reported along with CL polymerization.

scholarly journals Use of pyrazoles as ligands greatly enhances the catalytic activity of titanium iso-propoxide for the ring-opening polymerization of l-lactide: a cooperation effect

RSC Advances ◽  
2020 ◽  
Vol 10 (67) ◽  
pp. 40690-40696
Author(s):  
Tzu-Fang Wang ◽  
Someswara Rao Kosuru ◽  
Shu-Chun Yu ◽  
Yung-Chi Chang ◽  
Hsin-Yu Lai ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
One Pot

Using TiOiPr4 with a pyrazole ligand for one-pot LA polymerization improved catalytic activity compared with using TiOiPr4 only.

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