Catalytic insights into acid/base conjugates: highly selective bifunctional catalysts for the ring-opening polymerization of lactide

2011 ◽  
Vol 47 (11) ◽  
pp. 3105 ◽  
Author(s):  
Daniel J. Coady ◽  
Kazuki Fukushima ◽  
Hans W. Horn ◽  
Julia E. Rice ◽  
James L. Hedrick
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Bifunctional Catalysts ◽  
Acid Base

Near-to-eutectic mixtures as bifunctional catalysts in the low-temperature-ring-opening-polymerization of ε-caprolactone

2015 ◽  
Vol 17 (6) ◽  
pp. 3632-3643 ◽  
Author(s):  
Sara García-Argüelles ◽  
Carolina García ◽  
María C. Serrano ◽  
María C. Gutiérrez ◽  
M. Luisa Ferrer ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ring Opening ◽  
Methanesulfonic Acid ◽  
Ring Opening Polymerization ◽  
Bifunctional Catalysts ◽  
Eutectic Mixtures

We have investigated the ring-opening polymerization (ROP) of ε-caprolactone using mixtures of methanesulfonic acid and the guanidine 1,5,7-triazabicyclo[4.4.0]dec-5-ene as the catalyst.

New acid/base salts as co-catalysts for the organocatalyzed ring opening polymerization of lactide

2014 ◽  
Vol 53 (5) ◽  
pp. 659-664 ◽  
Author(s):  
Yong Miao ◽  
Nicholas Stanley ◽  
Audrey Favrelle ◽  
Till Bousquet ◽  
Marc Bria ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Acid Base ◽  
Co Catalysts

Simple Lewis pairs of zinc salts and organobases as bifunctional catalysts for controlled ring-opening polymerization of O-carboxyanhydrides

2019 ◽  
Vol 10 (40) ◽  
pp. 5498-5506 ◽  
Author(s):  
Pei Wang ◽  
Jinpeng Liang ◽  
Ting Yin ◽  
Jing Yang
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Bifunctional Catalysis ◽  
Bifunctional Catalysts ◽  
Hydroxyalkanoic Acid ◽  
Zinc Salts ◽  
Lewis Pairs

Simple Lewis pairs consisting of organobases and zinc salts were explored to promote ring-opening polymerization of phenyl O-carboxyanhydride via bifunctional catalysis, producing well-defined poly(α-hydroxyalkanoic acid)s with good isotacticity (Pm = 0.88).

Phosphoric and phosphoramidic acids as bifunctional catalysts for the ring-opening polymerization of ε-caprolactone: a combined experimental and theoretical study

2011 ◽  
Vol 2 (10) ◽  
pp. 2249 ◽  
Author(s):  
Damien Delcroix ◽  
Aline Couffin ◽  
Nicolas Susperregui ◽  
Christophe Navarro ◽  
Laurent Maron ◽  
...  
Keyword(s):  
Ring Opening ◽  
Theoretical Study ◽  
Ring Opening Polymerization ◽  
Bifunctional Catalysts

Synthesis and synthetic mechanism of Polylactic acid

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Xavier Montané ◽  
Josep M. Montornes ◽  
Adrianna Nogalska ◽  
Magdalena Olkiewicz ◽  
Marta Giamberini ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Polylactic Acid ◽  
Ring Opening ◽  
Fossil Fuel ◽  
Raw Materials ◽  
Ring Opening Polymerization ◽  
Bifunctional Catalysts ◽  
Organometallic Catalysts ◽  
Polymer Properties ◽  
Organic Catalyst

AbstractAt present, Polylactic acid (PLA) is one of the most used biodegradable polyesters. The good properties and its biodegradability make that PLA can replace the fossil fuel derived polymers in different applications. PLA can be synthesized by using different methodologies. Among them, the most widely used forms on an industrial scale are the direct polycondensation of Lactic acid and the ring-opening polymerization of cyclic Lactide. The final properties of the obtained PLA are dependent on the used stereoisomers of the raw materials (Lactic acid and/or Lactide) and the conditions employed to polymerize them. Therefore, the comprehension of the synthetic mechanism of PLA is crucial to control the stereoregularity of PLA, which in turn results in an improvement of the polymer properties. So, distinct mechanisms for the synthesis of PLA by ring-opening polymerization using different catalysts systems (organometallic catalysts, cationic catalyst, organic catalyst, bifunctional catalysts) are examined in this review.

scholarly journals Amphiphilic diblock copolymer of hydrophilic-functionalized lactone and lactide via switchable organocatalytic polymerization

RSC Advances ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 1905-1908
Author(s):  
Jinmei Bai ◽  
Xiaoying Tang ◽  
Yuan Zhang ◽  
Jingjing Lin ◽  
Minfeng Li
Keyword(s):  
Particle Size ◽  
Diblock Copolymer ◽  
Ring Opening ◽  
Diblock Copolymers ◽  
Main Chain ◽  
Ring Opening Polymerization ◽  
Acid Base ◽  
One Pot ◽  
Amphiphilic Diblock Copolymers ◽  
Organocatalytic Polymerization

Main-chain degradable amphiphilic diblock copolymers prepared by one-pot ring-opening polymerization via actively manipulating catalytic states of an acid–base catalytic system were capable of forming stable micelle with optimal particle size.

Lewis acid/base modulation in β-diiminate zinc-catalyzed switchable ring-opening polymerization of rac-lactide

2019 ◽  
Vol 62 (4) ◽  
pp. 475-478 ◽  
Author(s):  
Pan Zhang ◽  
Minhui Zhao ◽  
Wenmin Pang ◽  
Changle Chen
Keyword(s):  
Lewis Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Acid Base
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