Ring Opening Polymerization and Copolymerization of Cyclic Esters Catalyzed by Group 2 Metal Complexes Supported by Functionalized P–N Ligands

2018 ◽  
Vol 57 (5) ◽  
pp. 2503-2516 ◽  
Author(s):  
Adimulam Harinath ◽  
Jayeeta Bhattacharjee ◽  
Alok Sarkar ◽  
Hari Pada Nayek ◽  
Tarun K. Panda
Keyword(s):  
Metal Complexes ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Cyclic Esters ◽  
Group 2

Highly Active and Iso-Selective Catalysts for the Ring-Opening Polymerization of Cyclic Esters using Group 2 Metal Initiators

2017 ◽  
Vol 23 (39) ◽  
pp. 9319-9331 ◽  
Author(s):  
Jayeeta Bhattacharjee ◽  
Adimulam Harinath ◽  
Hari Pada Nayek ◽  
Alok Sarkar ◽  
Tarun K. Panda
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Cyclic Esters ◽  
Highly Active ◽  
Group 2

scholarly journals Synthesis of Biodegradable Polymers: A Review on the Use of Schiff-Base Metal Complexes as Catalysts for the Ring Opening Polymerization (ROP) of Cyclic Esters

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 800 ◽  
Author(s):  
Orlando Santoro ◽  
Xin Zhang ◽  
Carl Redshaw
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Base Metal ◽  
Biodegradable Polymers ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Polymerization Process ◽  
Cyclic Esters ◽  
Recent Advances ◽  
Schiff Base Metal Complexes

This review describes the recent advances (from 2008 onwards) in the use of Schiff-base metal complexes as catalysts for the ring opening polymerization (ROP) of cyclic esters. The synthesis and structure of the metal complexes, as well as all aspects concerning the polymerization process and the characteristics of the polymers formed, will be discussed.

Concerning the ring-opening polymerization of lactide and cyclic esters by coordination metal catalysts

2010 ◽  
Vol 82 (8) ◽  
pp. 1647-1662 ◽  
Author(s):  
Malcolm H. Chisholm
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Solvent Free ◽  
Single Site ◽  
Active Group ◽  
Cyclic Esters ◽  
Highly Active ◽  
Group 2 ◽  
Single Site Catalysts ◽  
Competing Reactions

A summary of the reactions involved in the ring-opening polymerization (ROP) of lactide (LA) to give polylactides (PLAs) is presented along with competing reactions. Particular attention is given to the stereoselective polymerization of rac-LA to give heterotactic PLA and meso-LA to give syndiotactic PLA by aluminum Schiff-based catalysts and to the development of highly active group 2 metal single-site catalysts. Melt or solvent-free polymerization is also described along with reactions that lead exclusively to cyclic-polylactides.

Metal complexes containing nitrogen-heterocycle based aryloxide or arylamido derivatives as discrete catalysts for ring-opening polymerization of cyclic esters

2016 ◽  
Vol 45 (44) ◽  
pp. 17557-17580 ◽  
Author(s):  
Bor-Hunn Huang ◽  
Chen-Yen Tsai ◽  
Chi-Tien Chen ◽  
Bao-Tsan Ko
Keyword(s):  
Metal Complexes ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Nitrogen Heterocycle ◽  
Cyclic Esters ◽  
Recent Advances

This perspective highlights some recent advances in the field of discrete N-heterocyclic aryloxide/arylamido metal complexes for ROP of lactones.

A switchable dimeric yttrium complex and its three catalytic states in ring opening polymerization

2021 ◽  
Author(s):  
Shijie Deng ◽  
Paula L. Diaconescu
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Oxidation States ◽  
Cyclic Esters

A dimeric yttrium phenoxide complex can be oxidized in a stepwise fashion to access three oxidation states. The three states show different activity in the ring opening polymerization of cyclic esters and epoxides.

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