scholarly journals Synthesis, Structure, and Catalytic Activity of Tridentate, Base-Functionalized β-Ketiminate Zinc Complexes in Ring-Opening Polymerization of Lactide

2014 ◽  
Vol 2014 (13) ◽  
pp. 2230-2240 ◽  
Author(s):  
Christoph Scheiper ◽  
Dennis Dittrich ◽  
Christoph Wölper ◽  
Dieter Bläser ◽  
Joachim Roll ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes

scholarly journals Catalytic Activity of Various β ‐Diketiminate Zinc Complexes toward the Ring‐Opening Polymerization of Caprolactone and Derivatives

2021 ◽  
pp. 2100187
Author(s):  
Moritz Köhler ◽  
Philipp Rinke ◽  
Kevin Fiederling ◽  
Helmar Görls ◽  
Nico Ueberschaar ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes

scholarly journals Ring-Opening Copolymerization of Cyclohexene Oxide and Cyclic Anhydrides Catalyzed by Bimetallic Scorpionate Zinc Catalysts

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1651
Author(s):  
Felipe de la Cruz-Martínez ◽  
Marc Martínez de Sarasa Buchaca ◽  
Almudena del Campo-Balguerías ◽  
Juan Fernández-Baeza ◽  
Luis F. Sánchez-Barba ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Mechanism ◽  
Catalytic System ◽  
Phthalic Anhydride ◽  
Ring Opening ◽  
High Selectivity ◽  
Zinc Complexes ◽  
Cyclohexene Oxide ◽  
Reaction Conditions ◽  
Cyclic Anhydrides

The catalytic activity and high selectivity reported by bimetallic heteroscorpionate acetate zinc complexes in ring-opening copolymerization (ROCOP) reactions involving CO2 as substrate encouraged us to expand their use as catalysts for ROCOP of cyclohexene oxide (CHO) and cyclic anhydrides. Among the catalysts tested for the ROCOP of CHO and phthalic anhydride at different reaction conditions, the most active catalytic system was the combination of complex 3 with bis(triphenylphosphine)iminium as cocatalyst in toluene at 80 °C. Once the optimal catalytic system was determined, the scope in terms of other cyclic anhydrides was broadened. The catalytic system was capable of copolymerizing selectively and efficiently CHO with phthalic, maleic, succinic and naphthalic anhydrides to afford the corresponding polyester materials. The polyesters obtained were characterized by spectroscopic, spectrometric, and calorimetric techniques. Finally, the reaction mechanism of the catalytic system was proposed based on stoichiometric reactions.

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

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.

scholarly journals New zinc complexes derived from “self-adaptable” acyclic diiminodipyrromethanes as potent catalysts for the reduction of curing temperature of bisphenol-A/F benzoxazines

RSC Advances ◽  
2020 ◽  
Vol 10 (60) ◽  
pp. 36275-36286
Author(s):  
Shiva K. Loke ◽  
Eswar Pagadala ◽  
S. Devaraju ◽  
V. Srinivasadesikan ◽  
Ravi K. Kottalanka
Keyword(s):  
Bisphenol A ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes ◽  
The Self ◽  
Curing Temperature ◽  
Schiff’S Bases ◽  
Schiff's Bases

The present work utilized the “self-adaptable” acyclic diiminodipyrromethane Schiff's bases (2a and 2b) for the synthesis of their Zn-based complexes and explored their potential in the ring-opening polymerization of BA-a and BF-a benzoxazines.

Molecular Structure–Catalytic Activity Relationship in the Ring-Opening Polymerization of (Macro)lactones

2016 ◽  
Vol 49 (3) ◽  
pp. 796-806 ◽  
Author(s):  
Mark P. F. Pepels ◽  
Inge Hermsen ◽  
Geert J. Noordzij ◽  
Rob Duchateau
Keyword(s):  
Molecular Structure ◽  
Catalytic Activity ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Activity Relationship

Anilido-imine zinc complexes: Efficient catalysts for ring-opening polymerization of L-lactide

2013 ◽  
Vol 29 (1) ◽  
pp. 48-50 ◽  
Author(s):  
Wei Yao ◽  
Ning Cui ◽  
Ying-zhao Xue ◽  
Tian-tian Liu ◽  
Yan Wang
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Zinc Complexes
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