Syntheses of high molecular weight aliphatic polyesters in 1-alkyl-3-methylimidazolium ionic liquids

Polymer ◽  
2008 ◽  
Vol 49 (2) ◽  
pp. 461-466 ◽  
Author(s):  
Chengjie Fu ◽  
Zhengping Liu
Keyword(s):  
Molecular Weight ◽  
Ionic Liquids ◽  
High Molecular Weight ◽  
Aliphatic Polyesters

scholarly journals New 1,2,3-Triazole Containing PolyestersviaClick Step-Growth Polymerization and Nanoparticles Made of Them

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Tengiz Kantaria ◽  
Temur Kantaria ◽  
Giorgi Titvinidze ◽  
Giuli Otinashvili ◽  
Nino Kupatadze ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Sodium Azide ◽  
Dicarboxylic Acids ◽  
Solution Concentration ◽  
One Pot ◽  
Bromoacetic Acid ◽  
Aliphatic Polyesters ◽  
Step Growth ◽  
Step Growth Polymerization

High-molecular-weight AA-BB-type aliphatic polyesters were synthesizedviaCu(I)-catalyzed click step-growth polymerization (SGP) following a new synthetic strategy. The synthesis was performed between diyne and diazide monomers in an organic solvent as one pot process using three components and two stages. The dipropargyl esters of dicarboxylic acids (component 1) were used as diyne monomers, di-(bromoacetic acid)-alkylene diesters (component 2) were used as precursors of diazide monomers, and sodium azide (component 3) was used for generating diazide monomers. The SGP was carried out in two steps: at Step  1 dibromoacetates interacted with two moles of sodium azide resulting in diazide monomers which interacted in situ with diyne monomers at Step  2 in the presence of Cu(I) catalyst. A systematic study was done for optimizing the multiparameter click SGP in terms of the solvent, duration of both Step  1 and Step  2, solution concentration, catalyst concentration, catalyst and catalyst activator (ligand) nature, catalyst/ligand mole ratio, and temperature of both steps of the click SGP. As a result, high-molecular-weight (MWup to 74 kDa) elastic film-forming click polyesters were obtained. The new polymers were found suitable for fabricating biodegradable nanoparticles, which are promising as drug delivery containers in nanotherapy.

scholarly journals Glycol-functionalized ionic liquids for high-temperature enzymatic ring-opening polymerization

RSC Advances ◽  
2018 ◽  
Vol 8 (63) ◽  
pp. 36025-36033 ◽  
Author(s):  
Hua Zhao ◽  
Lennox O. Afriyie ◽  
Nathaniel E. Larm ◽  
Gary A. Baker
Keyword(s):  
Thermal Stability ◽  
Molecular Weight ◽  
Ionic Liquids ◽  
High Temperature ◽  
High Molecular Weight ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
High Thermal Stability ◽  
Polymerization Reaction

New glycol-functionalized ionic liquids exhibit high thermal stability and are lipase-compatible, leading to a high molecular weight of polyester in the enzymatic ring-opening polymerization reaction.

Synthesis and enzymatic degradation of high molecular weight aliphatic polyesters

2001 ◽  
Vol 80 (3) ◽  
pp. 340-347 ◽  
Author(s):  
Hiroyuki Shirahama ◽  
Yoshihide Kawaguchi ◽  
Mohad S. Aludin ◽  
Hajime Yasuda
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Enzymatic Degradation ◽  
Aliphatic Polyesters

Synthesis of bio-based polycarbonate via one-step melt polycondensation of isosorbide and dimethyl carbonate by dual site-functionalized ionic liquid catalysts

2021 ◽  
Author(s):  
Zifeng Yang ◽  
Xue Li ◽  
Fei Xu ◽  
Weiwei Wang ◽  
Yongqing Shi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
High Molecular Weight ◽  
Dimethyl Carbonate ◽  
Synthetic Pathway ◽  
Melt Polycondensation ◽  
Direct Melt Polycondensation ◽  
One Step ◽  
Dual Site

A synthetic pathway for high molecular weight isosorbide-based polycarbonate was developed via one-step direct melt polycondensation of isosorbide and dimethyl carbonate catalyzed by dual site-functionalized ionic liquids.

A non-phosgene process for bioderived polycarbonate with high molecular weight and advanced property profile synthesized using amino acid ionic liquids as catalysts

2020 ◽  
Vol 22 (8) ◽  
pp. 2534-2542 ◽  
Author(s):  
Zhencai Zhang ◽  
Fei Xu ◽  
Yaqin Zhang ◽  
Chenhao Li ◽  
Hongyan He ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ionic Liquids ◽  
Amino Acid ◽  
High Molecular Weight ◽  
Property Profile

Bio-based polycarbonate with high molecular weight and advanced property profile was synthesized using amino acid ionic liquids as catalysts.

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