Semipermeable poly(ethylene glycol) films: the relationship between permeability and molecular structure of polymer chains

Soft Matter ◽  
2009 ◽  
Vol 5 (21) ◽  
pp. 4104 ◽  
Author(s):  
Robert Schlapak ◽  
Daren Caruana ◽  
David Armitage ◽  
Stefan Howorka
Keyword(s):  
Molecular Structure ◽  
Ethylene Glycol ◽  
Polymer Chains ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
The Relationship

Molecular structure and dynamics of poly(methacrylic acid) and poly(acrylic acid) complexes with dodecyl-substituted poly(ethylene glycol)

2003 ◽  
Vol 282 (4) ◽  
pp. 402-406 ◽  
Author(s):  
Alexander M. Wasserman ◽  
Larisa L. Yasina ◽  
Israil I. Aliev ◽  
Veneta Doseva ◽  
Vladimir Y. Baranovsky
Keyword(s):  
Molecular Structure ◽  
Acrylic Acid ◽  
Ethylene Glycol ◽  
Methacrylic Acid ◽  
Poly Ethylene Glycol ◽  
Structure And Dynamics ◽  
Poly Ethylene ◽  
Poly Acrylic Acid

Adsorption of PolyCarboxylate Poly(ethylene glycol) (PCP) esters on Montmorillonite (Mmt): Effect of exchangeable cations (Na+, Mg2+ and Ca2+) and PCP molecular structure

2015 ◽  
Vol 437 ◽  
pp. 227-234 ◽  
Author(s):  
Rachid Ait-Akbour ◽  
Pascal Boustingorry ◽  
Fabrice Leroux ◽  
Frédéric Leising ◽  
Christine Taviot-Guého
Keyword(s):  
Molecular Structure ◽  
Ethylene Glycol ◽  
Exchangeable Cations ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Quantitation of Poly(Ethylene Glycol) Concentration Using Raman Spectroscopy

1997 ◽  
Vol 51 (8) ◽  
pp. 1176-1178 ◽  
Author(s):  
Yanira Meléndez ◽  
Kimberley F. Schrum ◽  
Dor Ben-Amotz
Keyword(s):  
Raman Spectroscopy ◽  
Ethylene Glycol ◽  
Nonlinear Function ◽  
Weight Fraction ◽  
Raman Intensity ◽  
Poly Ethylene Glycol ◽  
Universal Scaling ◽  
Poly Ethylene ◽  
Chain Lengths ◽  
The Relationship

This study uses Raman spectroscopy to quantitate the amount of polymer in solution, in particular poly(ethylene glycol) dissolved in chloroform. For various chain lengths and polymer weight fraction ranges, it is shown that the ratios of peak intensities in the C–H stretching region may be used to quantitate polymer weight fraction with about 1% uncertainty. For low polymer weight fraction ranges (0–10%), the relationship between Raman intensity and polymer weight fraction is essentially linear, while at higher ranges (0–50%) the intensity follows a nonlinear function derived from basic concentration relationships and indicates a universal scaling with polymer chain length.

scholarly journals Surfactant-free emulsion polymerization of vinylidene fluoride mediated by RAFT/MADIX reactive poly(ethylene glycol) polymer chains

2021 ◽  
Author(s):  
Mathieu Fuentes Exposito ◽  
Sébastien Norsic ◽  
Thibaut Février ◽  
Pierre-Yves Dugas ◽  
Salima Boutti ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Emulsion Polymerization ◽  
Vinylidene Fluoride ◽  
Polymer Chains ◽  
Poly Ethylene Glycol ◽  
Poly Vinylidene Fluoride ◽  
Emulsion Polymerizations ◽  
Poly Ethylene

A robust and straightforward synthesis of surfactant-free poly(vinylidene fluoride) (PVDF) latexes is presented using RAFT/MADIX-mediated emulsion polymerization. VDF emulsion polymerizations were conducted in the presence of commercial poly(ethylene glycol) chains...

Study on Degradable Polyurethane Foams with Mixed PEG/PCL and PLA/PCL Soft Segments

2012 ◽  
Vol 518-523 ◽  
pp. 821-827 ◽  
Author(s):  
Jian Hua Wang ◽  
Shuen Liang ◽  
Chun Rong Tian ◽  
Xiu Li Zhao ◽  
Xiao Yan Lin
Keyword(s):  
Molecular Structure ◽  
Mechanical Performance ◽  
Soft Segment ◽  
Polyurethane Foams ◽  
Polymer Chains ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Soft Segments ◽  
Poly Ethylene ◽  
Tetramethylene Oxide

Through inclusion of different polymer chains with different properties into polyurethane matrix, such as poly(ethylene glycol) (PEG), poly(ε-caprolactone) (PCL), poly(lactic acid) (PLA), or poly(tetramethylene oxide) (PTMG), degradable polyurethane foams (PUFs) with different molecular structure were prepared. Influences of molecular structure on PUF materials’ performance were studied systematically. When PEG, PCL, PLA, and PTMG serve as soft segment, PUFs’ storage modulus and glass transition temperature (Tg) of PUFs decrease with following order: PLA>PCL>PEG>PTMG (flexibility of PUFs varies oppositely). And degradability decreases according to following order: PEG>PLA>PCL>PTMG. With increasing content of PEG or PLA chains in PU matrix, mechanical performance of PUFs decrease gradually, but remains on the same order with conventional non-degradable PUFs. Through control on the contents of different kinds of polymer chains in soft segments of PUFs, fairly good degradability can be achieved, at whilst their basic mechanical performance is well guaranteed.

Poly(ethylene glycol)-Grafted Liposomes with Oligopeptide or Oligosaccharide Ligands Appended to the Termini of the Polymer Chains

1997 ◽  
Vol 8 (2) ◽  
pp. 111-118 ◽  
Author(s):  
Samuel Zalipsky ◽  
Nasreen Mullah ◽  
Jennifer A. Harding ◽  
Joshua Gittelman ◽  
Luke Guo ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Polymer Chains ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

scholarly journals Photocontrolled Radical Polymerization from Hydridic C–H Bonds

2019 ◽  
Author(s):  
Erin Stache ◽  
Veronika Kottisch ◽  
Brett Fors
Keyword(s):  
Hydrogen Atom ◽  
Ethylene Glycol ◽  
Polymer Chains ◽  
Hydrogen Atom Abstraction ◽  
Graft Polymer ◽  
Poly Ethylene Glycol ◽  
Controlled Polymerization ◽  
Poly Ethylene ◽  
Grafting From ◽  
Powerful Strategy

<p>Given the ubiquity of C–H bonds in biomolecules and polymer backbones, the development of a photocontrolled polymerization from a C–H bond would represent a powerful strategy for selective polymer conjugation precluding several synthetic steps to introduce complex functionality. We have developed a hydrogen-atom abstraction strategy that allows for a controlled polymerization from a C­–H bond using a benzophenone photocatalyst, a trithiocarbonate-derived disulfide, and visible light. We perform the polymerization from a variety of ethers, alkanes, unactivated C–H bonds, and alcohols as well as showcase the applicability of the method to several monomer classes. Our method lends itself to photocontrol which has important implications for building advanced macromolecular architectures. Finally, we demonstrate that we can graft polymer chains controllably from poly(ethylene glycol) showcasing the potential application of this method for controlled grafting from C–H bonds of commodity polymers.</p>

scholarly journals Effect of Molecular Structure on the CO2 Separation Properties of Hydrophobic Solvents Consisting of Grafted Poly Ethylene Glycol and Poly Dimethylsiloxane Units

2019 ◽  
Vol 33 (5) ◽  
pp. 4432-4441
Author(s):  
Robert L. Thompson ◽  
Jeff Culp ◽  
Surya P. Tiwari ◽  
Omar Basha ◽  
Wei Shi ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Ethylene Glycol ◽  
Co2 Separation ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Thermodynamic study of poly(ethylene glycol) in water/acetone solutions by viscometry

2011 ◽  
Vol 31 (5) ◽  
Author(s):  
Abbas Mehrdad ◽  
Mohammad Taghi Taghizadeh ◽  
Roghieh Moladoust
Keyword(s):  
Ethylene Glycol ◽  
Polymer Chains ◽  
Viscosity Data ◽  
Poly Ethylene Glycol ◽  
Solvent Interaction ◽  
Solvent Interactions ◽  
Volume Fractions ◽  
Poly Ethylene ◽  
Increasing Temperature ◽  
Mixed Water

Abstract In this work, the intrinsic viscosities of poly(ethylene glycol) (PEG) with a molar mass of 20,000 g·mol-1 were measured in water/acetone solutions from (283.1 to 313.1) K. The expansion factors of the polymer chains were calculated from the intrinsic viscosity data. The thermodynamic para­meters (entropy of dilution parameter, the heat of dilution para­meter, θ temperature, polymer-solvent interaction parameter and second osmotic virial coefficient) were derived by the temperature dependence of the polymer chain expansion factor. The thermodynamic parameters indicate that mixtures of water/acetone are changed to the poorer solvents for PEG, by increasing temperature and volume fractions of acetone. Also, the temperature dependency of segment-segment and segment-solvent interactions for PEG in mixed water/acetone, is decreased by increasing volume fractions of acetone.

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