Biometal Derivatives as Catalysts for the Ring-Opening Polymerization of Trimethylene Carbonate. Optimization of the Ca(II) Salen Catalyst System

2006 ◽  
Vol 39 (13) ◽  
pp. 4374-4379 ◽  
Author(s):  
Donald J. Darensbourg ◽  
Wonsook Choi ◽  
Poulomi Ganguly ◽  
Casseday P. Richers
Keyword(s):  
Ring Opening ◽  
Catalyst System ◽  
Ring Opening Polymerization ◽  
Trimethylene Carbonate

scholarly journals Development of Four Unit Processes for Biobased PLA Manufacturing

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Chae Hwan Hong ◽  
Si Hwan Kim ◽  
Ji-Yeon Seo ◽  
Do Suck Han
Keyword(s):  
Lactic Acid ◽  
Ring Opening ◽  
Lactic Acid Production ◽  
Scale Up ◽  
Catalyst System ◽  
Ring Opening Polymerization ◽  
Acid Fermentation ◽  
Manufacturing Method ◽  
Renewable Biomass ◽  
Microbial Productivity

Polylactide (PLA), which is one of the most important biocompatible polyesters that are derived from annually renewable biomass such as corn and sugar beets, has attracted much attention for automotive parts application. The manufacturing method of PLA is the ring-opening polymerization of the dimeric cyclic ester of lactic acid, lactide. For the stereocomplex PLA, we developed the four unit processes, fermentation, separation, lactide conversion, and polymerization. Fermentation of sugars to D-lactic acid is little studied, and its microbial productivity is not well known. Therefore, we investigated D-lactic acid fermentation with a view to obtaining the strains capable of producing D-lactic acid, and we got a maximum lactic acid production 60 g/L. Lactide is prepared by a two-step process: first, the lactic acid is converted into oligo(lactic acid) by a polycondensation reaction; second, the oligo(lactic acid) is thermally depolymerized to form the cyclic lactide via an unzipping mechanism. Through catalyst screening test for polycondensation and depolymerization reactions, we got a new method which shortens the whole reaction time 50% the level of the conventional method. Poly(L-lactide) was obtained from the ring-opening polymerization of L-lactide. We investigated various catalysts and polymerization conditions. Finally, we got the best catalyst system and the scale-up technology.

Construction of polyphosphoesters with the main chain of rigid backbones and stereostructures via organocatalyzed ring-opening polymerization

2020 ◽  
Vol 11 (20) ◽  
pp. 3475-3480
Author(s):  
Yu-Jia Zheng ◽  
Guan-Wen Yang ◽  
Bo Li ◽  
Guang-Peng Wu
Keyword(s):  
Ring Opening ◽  
Main Chain ◽  
Catalyst System ◽  
Ring Opening Polymerization ◽  
System P ◽  
Organic Catalyst

A highly stereoregular polyphosphoester with a rigid cyclohexylene structure in the main chain was constructed via ring-opening polymerization (ROP) in the presence of an organic catalyst system.

Ring-opening polymerization of trimethylene carbonate to poly(trimethylene carbonate) diol over a heterogeneous high-temperature calcined CeO2 catalyst

2018 ◽  
Vol 54 (99) ◽  
pp. 14017-14020 ◽  
Author(s):  
Masazumi Tamura ◽  
Keitaro Matsuda ◽  
Yoshinao Nakagawa ◽  
Keiichi Tomishige
Keyword(s):  
High Temperature ◽  
Heterogeneous Catalyst ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Trimethylene Carbonate

CeO2 calcined at 1273 K was an effective reusable heterogeneous catalyst for the synthesis of poly(trimethylene carbonate) diol by ring-opening polymerization of trimethylene carbonate under neat conditions without any additives.

scholarly journals Zirconium (IV) Acetylacetonate: Ring-Opening Initiator Mediating One-Step Synthesis of Biodegradable Polyacids

2019 ◽  
Vol 2019 ◽  
pp. 1-10 ◽  
Author(s):  
Piotr Dobrzyński ◽  
Małgorzata Pastusiak ◽  
Joanna Jaworska ◽  
Bożena Kaczmarczyk ◽  
Michał Kwiecień ◽  
...  
Keyword(s):  
Carboxylic Acid ◽  
Acid Derivative ◽  
Ring Opening ◽  
Active Catalyst ◽  
Ring Opening Polymerization ◽  
Cyclic Carbonate ◽  
Trimethylene Carbonate ◽  
Step Method ◽  
Polymerization Mechanism ◽  
One Step

Biodegradable polyacid is obtained in one-step ring-opening polymerization (ROP) of carboxylic-acid-functionalized six-membered cyclic carbonate mediated with zirconium (IV) acetylacetonate. Exemplary copolymers with L,L-lactide are described as well. Moreover, zirconium (IV) acetylacetonate is found to be active catalyst of trimethylene carbonate (TMC) ROP in presence of carboxylic acid yielding PTMC end-capped with the acid derivative. Polymerization mechanism is hypothesized demonstrating possibilities of the method in work-saving polycation synthesis and one-step method of conjugate synthesis of well-known biocompatible polyesters and polycarbonates.

A New Insight Into the Mechanism of the Ring-Opening Polymerization of Trimethylene Carbonate Catalyzed by Methanesulfonic Acid

2012 ◽  
Vol 214 (1) ◽  
pp. 85-93 ◽  
Author(s):  
João M. Campos ◽  
Maria R. Ribeiro ◽  
Maria F. Ribeiro ◽  
Alain Deffieux ◽  
Frédéric Peruch
Keyword(s):  
Ring Opening ◽  
Methanesulfonic Acid ◽  
Ring Opening Polymerization ◽  
Trimethylene Carbonate ◽  
Insight Into

Ultraproductive, Zinc-Mediated, Immortal Ring-Opening Polymerization of Trimethylene Carbonate

2008 ◽  
Vol 14 (29) ◽  
pp. 8772-8775 ◽  
Author(s):  
Marion Helou ◽  
Olivier Miserque ◽  
Jean-Michel Brusson ◽  
Jean-François Carpentier ◽  
Sophie M. Guillaume
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Trimethylene Carbonate
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