Synthesis and aggregation properties in water solution of comblike methacrylic polymers with oligo(propylene glycol)-block -oligo(ethylene glycol) as side chains

2011 ◽  
Vol 49 (8) ◽  
pp. 1928-1932 ◽  
Author(s):  
Rodrigo París ◽  
Isabel Quijada-Garrido
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Water Solution ◽  
Side Chains

Synthesis and thermoresponsive properties of polymethacrylate molecular brushes with oligo(ethylene glycol)-block-oligo(propylene glycol) side chains

2021 ◽  
Author(s):  
D. M. Kamorin ◽  
A. S. Simagin ◽  
D. V. Orekhov ◽  
O. A. Kazantsev ◽  
E. A. Bolshakova ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Side Chains ◽  
Molecular Brushes

scholarly journals Conformation, Self-Organization and Thermoresponsibility of Polymethacrylate Molecular Brushes with Oligo(ethylene glycol)-block-oligo(propylene glycol) Side Chains

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2715
Author(s):  
Maria Simonova ◽  
Denis Kamorin ◽  
Oleg Kazantsev ◽  
Maria Nepomnyashaya ◽  
Alexander Filippov
Keyword(s):  
Phase Separation ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Propylene Glycol ◽  
Self Organization ◽  
Side Chains ◽  
Molecular Brushes ◽  
Critical Micelle Concentrations

Polymethacrylic molecular brushes with oligo(ethylene glycol)-block-oligo(propylene glycol) side chains were investigated by static and dynamic light scattering and viscometry. The solvents used were acetonitrile, tetrahydrofuran, chloroform, and water. The grafted copolymers were molecularly dispersed and dissolved in tetrahydrofuran and acetonitrile. In these solvents, the molar masses of copolymers were determined. In thermodynamically good solvents, namely tetrahydrofuran and acetonitrile, investigated copolymers have a high intramolecular density and the shape of their molecules resembles a star-shaped macromolecule. In chloroform and water, the micelle-like aggregates were formed. Critical micelle concentrations decreased with the lengthening of the hydrophobic block. Molecular brushes demonstrated thermosensitive behavior in aqueous solutions. The phase separation temperatures reduced with an increase in the content of the oligo(propylene glycol) block.

Hydrogenolysis of glucose and fructose in glycol solutions over CuO-MgO-ZrO2 catalyst

2020 ◽  
pp. 48-55
Author(s):  
M.E. Sharanda ◽  
◽  
E.A. Bondarenko ◽  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Flow Reactor ◽  
General Trend ◽  
Raw Materials ◽  
Reaction Products ◽  
Renewable Raw Materials ◽  
High Partial Pressure ◽  
Zro2 Catalyst ◽  
Phase Process

Ethylene glycol and propylene glycol are important representatives of polyols. On an industrial scale, they are obtained from petrochemical raw materials. Within a decade, significant efforts were made for the producing of polyols from biologically renewable raw materials - carbohydrates. The general trend for carbohydrate hydrogenolysis includes application of liquid-phase process with the use of modified metal-oxide catalysts, at 120-120 ° C and pressure of 3MPa or above. So high pressure is used for the reason to increase hydrogen solubility, and also due to the high partial pressure of low boiling solvents. We supposed that usage of high boiling solvents could allow hydrogenolysis to be performed at the lower pressure. Ethylene glycol and propylene glycol are of particular interest as such kind of solvent since they are both the main products of glucose hydrogenolysis. In this work, the process of hydrogenolysis of glucose and fructose over Cu / MgO-ZrO2 catalyst have been studied at temperature range of 160-200 °C and a pressure of 0.1-0.3 MPa in a flow reactor. The solvents were simultaneously the target products of the reaction - ethylene glycol and / or propylene glycol. Gas chromatography and 13C NMR were used for the reaction products identification. It was found that the solubility of glucose in propylene glycol is 21 % by weight, and in ethylene glycol 62% by weight. It was pointed out that the process of hydrogenolysis can take place at a pressure close to atmospheric. Under these conditions, the conversion of hexoses reaches 96-100 %. The reaction products are preferably propylene glycol and ethylene glycol. The total selectivity for C3-2 polyols is 90-94 %, that is higher than in the hydrogenolysis of glucose in aqueous solution.

Aqueous-Alcohol-Processable High-Mobility Semiconducting Copolymers with Engineered Oligo(ethylene glycol) Side Chains

2019 ◽  
Vol 32 (3) ◽  
pp. 1111-1119 ◽  
Author(s):  
Boseok Kang ◽  
Ziang Wu ◽  
Min Je Kim ◽  
Han Young Woo ◽  
Jeong Ho Cho
Keyword(s):  
Ethylene Glycol ◽  
High Mobility ◽  
Side Chains ◽  
Aqueous Alcohol

Determination of Small Amounts of 1,2-Propylene Glycol in Ethylene Glycol

1952 ◽  
Vol 24 (6) ◽  
pp. 1053-1055 ◽  
Author(s):  
W. A. Cannon ◽  
L. C. Jackson
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol

Efficient bimetallic NiCu-SiO2 catalysts for selective hydrogenolysis of xylitol to ethylene glycol and propylene glycol

2018 ◽  
Vol 220 ◽  
pp. 251-263 ◽  
Author(s):  
Hailong Liu ◽  
Zhiwei Huang ◽  
Haixiao Kang ◽  
Xuemei Li ◽  
Chungu Xia ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Selective Hydrogenolysis

Betaine + (Glycerol or Ethylene Glycol or Propylene Glycol) Deep Eutectic Solvents for Extractive Purification of Gasoline

2018 ◽  
Vol 3 (44) ◽  
pp. 12582-12590 ◽  
Author(s):  
Kristina Zagajski Kučan ◽  
Marijana Perković ◽  
Karlo Cmrk ◽  
Dominik Načinović ◽  
Marko Rogošić
Keyword(s):  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Deep Eutectic Solvents

A chitosan/poly(ethylene glycol)-ran-poly(propylene glycol) blend as an eco-benign separator and binder for quasi-solid-state supercapacitor applications

2019 ◽  
Vol 3 (3) ◽  
pp. 760-773 ◽  
Author(s):  
M. Raja ◽  
Balaji Sadhasivam ◽  
Janraj Naik R ◽  
Dhamodharan R ◽  
Kothandaraman Ramanujam
Keyword(s):  
Activated Carbon ◽  
Solid State ◽  
Ethylene Glycol ◽  
Propylene Glycol ◽  
Tamarindus Indica ◽  
Poly Ethylene Glycol ◽  
Active Electrode ◽  
Poly Ethylene ◽  
Poly Propylene ◽  
Supercapacitor Applications

In this study chitosan/poly(ethylene glycol)-ran-poly(propylene glycol) blend was developed as separator and binder for supercapacitor (SC) applications. The activated carbon (ACTS-900) derived fromTamarindus indicaseeds is used as active electrode material.

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