Enhanced stereocomplex formation of high-molecular-weight polylactides by gelation in an ionic liquid

2013 ◽  
Vol 63 (6) ◽  
pp. 1101-1104 ◽  
Author(s):  
Jie Zhu ◽  
Bing Na ◽  
Ruihua Lv ◽  
Chun Li
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
High Molecular Weight ◽  
Stereocomplex Formation

Ionic liquid coated lipase: Green synthesis of high molecular weight poly(1,4-dioxan-2-one)

2012 ◽  
Vol 77 ◽  
pp. 46-52 ◽  
Author(s):  
Feng-Xia Dong ◽  
Lei Zhang ◽  
Xiao-Zuo Tong ◽  
Hong-Bing Chen ◽  
Xiu-Li Wang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Green Synthesis ◽  
High Molecular Weight ◽  
High Molecular Weight Poly

High Molecular Weight Polystyrene Obtained by Cationic Emulsion Polymerization Catalyzed by Imidazolium‐Based Ionic Liquid

2018 ◽  
Vol 13 (2) ◽  
pp. 1800061 ◽  
Author(s):  
Vinicius M. B. Patrocinio ◽  
Tamara Agner ◽  
Gabriel V. S. Dutra ◽  
Fabricio Machado ◽  
Brenno A. D. Neto ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ionic Liquid ◽  
Emulsion Polymerization ◽  
High Molecular Weight

Synthesis of high-molecular weight isosorbide-based polycarbonates through efficient activation of endo-hydroxyl groups by an ionic liquid

2019 ◽  
Vol 21 (14) ◽  
pp. 3891-3901 ◽  
Author(s):  
Zhencai Zhang ◽  
Fei Xu ◽  
Hongyan He ◽  
Weilu Ding ◽  
Wenjuan Fang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Hydrogen Bond ◽  
Ionic Liquid ◽  
High Molecular Weight ◽  
Hydroxyl Groups

A high-molecular weight bio-based polycarbonate was successfully synthesized by breaking the hydrogen bond of endo-OH group using an ionic liquid.

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.

scholarly journals Synthesis of High Molecular Weight Chitosan from Chitin by Mechanochemistry and Aging

2018 ◽  
Author(s):  
Thomas Di Nardo ◽  
Caroline Hadad ◽  
Albert Nguyen Van Nhien ◽  
Audrey Moores
Keyword(s):  
Molecular Weight ◽  
Nuclear Magnetic Resonance ◽  
Ionic Liquid ◽  
High Molecular Weight ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Molecular Weights ◽  
Aging Conditions ◽  
Angle Spinning ◽  
High Molecular Weight Chitosan

We report herein a novel path, relying on a combination of mechanochemitry and aging, to afford high molecular weight chitosan with minimal use of energy and solvent. We demonstrate that this method is versatile and applicable to a number of chitin sources, including crude crustaceans and insect shells, yielding deacetylation up to 98% and molecular weights up to 20,770 kDa. Chitin deacetylation yields were measured by magic angle spinning nuclear magnetic resonance. Chitin and chitosans molecular weights were calculated by viscometry using an ionic liquid as a solvent. The effect of amorphization of chitin, and aging conditions, including humidity levels and temperatures were studied. <br>

scholarly journals Synthesis of High Molecular Weight Chitosan from Chitin by Mechanochemistry and Aging

2018 ◽  
Author(s):  
Thomas Di Nardo ◽  
Caroline Hadad ◽  
Albert Nguyen Van Nhien ◽  
Audrey Moores
Keyword(s):  
Molecular Weight ◽  
Nuclear Magnetic Resonance ◽  
Ionic Liquid ◽  
High Molecular Weight ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Molecular Weights ◽  
Aging Conditions ◽  
Angle Spinning ◽  
High Molecular Weight Chitosan

We report herein a novel path, relying on a combination of mechanochemitry and aging, to afford high molecular weight chitosan with minimal use of energy and solvent. We demonstrate that this method is versatile and applicable to a number of chitin sources, including crude crustaceans and insect shells, yielding deacetylation up to 98% and molecular weights up to 20,770 kDa. Chitin deacetylation yields were measured by magic angle spinning nuclear magnetic resonance. Chitin and chitosans molecular weights were calculated by viscometry using an ionic liquid as a solvent. The effect of amorphization of chitin, and aging conditions, including humidity levels and temperatures were studied. <br>

Stereocomplex formation of high-molecular-weight polylactide: A low temperature approach

Polymer ◽  
2012 ◽  
Vol 53 (24) ◽  
pp. 5449-5454 ◽  
Author(s):  
Rui-Ying Bao ◽  
Wei Yang ◽  
Wen-Rou Jiang ◽  
Zheng-Ying Liu ◽  
Bang-Hu Xie ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Low Temperature ◽  
High Molecular Weight ◽  
Stereocomplex Formation
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