scholarly journals End group functionalization of poly(ethylene glycol) with phenolphthalein: towards star-shaped polymers based on supramolecular interactions

2014 ◽  
Vol 10 ◽  
pp. 2263-2269 ◽  
Author(s):  
Carolin Fleischmann ◽  
Hendrik Wöhlk ◽  
Helmut Ritter
Keyword(s):  
Ethylene Glycol ◽  
Cycloaddition Reaction ◽  
Supramolecular Interactions ◽  
Poly Ethylene Glycol ◽  
Naked Eye ◽  
Vis Spectroscopy ◽  
End Group Functionalization ◽  
Interesting Approach ◽  
Poly Ethylene ◽  
End Group

The synthesis of a new phenolphthalein azide derivative, which can be easily utilized in polymer analogous reactions, is presented. The subsequent cycloaddition reaction with propargyl-functionalized methoxypoly(ethylene glycol) yielded polymers bearing phenolphthalein as the covalently attached end group. In presence of per-β-cyclodextrin-dipentaerythritol, the formation of stable inclusion complexes was observed, representing an interesting approach towards the formation of star shaped polymers. The decolorization of a basic polymer solution caused by the complexation was of great advantage since this behavior enabled following the complex formation by UV–vis spectroscopy and even the naked eye.

scholarly journals Enhancement of poly(ethylene glycol) mucoadsorption by biomimetic end group functionalization

2006 ◽  
Vol 1 (4) ◽  
pp. 134-141 ◽  
Author(s):  
Nathaniel D. Catron ◽  
Haeshin Lee ◽  
Phillip B. Messersmith
Keyword(s):  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
End Group Functionalization ◽  
Poly Ethylene ◽  
End Group

scholarly journals Sizing and Thermal Stability of Prepared Tetraaminophthalocyaninatocopper(II) Derivatives-grafted Polymers

2016 ◽  
Vol 13 (2) ◽  
pp. 221-234
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thermal Stability ◽  
Ethylene Glycol ◽  
Group Analysis ◽  
Condensation Polymerization ◽  
Grafted Polymers ◽  
Poly Ethylene Glycol ◽  
Molecular Weights ◽  
Poly Ethylene ◽  
Thermal Stability Of ◽  
End Group

Different polymers were prepared by condensation polymerization of sebacic anhydride and adipic anhydride with ethylene glycol and poly(ethylene glycol). Their number average molecular weights were determined by end group analysis. Then, they were grafted on the prepared phthalocyaninatocopper(II) compounds with the general formula (NH2)4PcCu(II) having amino groups of 3,3',3'',3'''- or 4,4',4'',4'''- positions. All prepared polymers, compounds, and phthalocyaninatocopper(II)-grafted polymers were characterized by FTIR. The sizing measurements were carried out in 3,3',3'',3'''- (NH2)4PcCu(II) and 4,4',4'',4'''- (NH2)4PcCu(II) compounds with and without grafting polymers. The results showed that the grafting process led to decreasing in particle size and increasing in surface area. The grafting process was reflected positively on the thermal degradation of 3,3',3'',3'''- (NH2)4PcCu(II) and 4,4',4'',4'''- (NH2)4PcCu(II) grafted polymers. They had higher thermal stability accompanied with higher char residue and T50% weight loss with 3,3',3'',3'''-(NH2)4PcCu(II) and their grafted polymers being the best.

Control the Surface Wettability of Thermo-Responsive Poly(Ethylene Glycol Methyl Ether methacrylate-co-Triethylene Glycol Methyl Ether Methacrylate) Thin Film by Varying Temperature

2021 ◽  
Vol 873 ◽  
pp. 53-58
Author(s):  
Yang Yi Chen ◽  
Min Pan ◽  
Shan Hong Hu ◽  
Qi Huan ◽  
Chu Yang Zhang
Keyword(s):  
Thin Film ◽  
Ethylene Glycol ◽  
Methyl Ether ◽  
Triethylene Glycol ◽  
Surface Wettability ◽  
Molar Ratio ◽  
Poly Ethylene Glycol ◽  
Vis Spectroscopy ◽  
Poly Ethylene ◽  
Glycol Methyl Ether

The surface wettability of thermo-responsive random poly (ethylene glycol methyl ether methacrylate-co-triethylene glycol methyl ether methacrylate), abbreviated as P(MEOMA-co-MEO3MA), was investigated in thin film. UV-Vis spectroscopy shows that the LCST of P(MEOMA-co-MEO3MA) with molar ratios of 0:20, 6:14 and 9:11 were 43°C, 32 oC and 25 oC, respectively. LCST shifts towards lower temperature when molar ratio of MEOMA increases. ATR-FTIR indicates that P(MEOMA-co-MEO3MA) thin film experienced a collapse when the temperature passes its LCST. The contact angle of the paraffin oil on the film decreases 15o when the temperature is above its LCST, which confirms the surface wettability can be controlled. Atomic force microscopy shows the surface of the swollen thin film becomes rougher when above it LCST.

scholarly journals Hydrogels by supramolecular crosslinking of terpyridine end group functionalized 8-arm poly(ethylene glycol)

Soft Matter ◽  
2014 ◽  
Vol 10 (37) ◽  
pp. 7328-7336 ◽  
Author(s):  
Rong Wang ◽  
Mike Geven ◽  
Pieter J. Dijkstra ◽  
Penny Martens ◽  
Marcel Karperien
Keyword(s):  
Transition Metal ◽  
Ethylene Glycol ◽  
Metal Ions ◽  
Transition Metal Ions ◽  
Nano Particles ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
End Group

Complexion of transition metal ions with a terpyridyl end-group 8-arm poly(ethylene glycol) afforded either nano-particles or hydrogels at different concentrations.

Ruthenium(II) Ions triggered direct supramolecular polymerization of bis-terpyridine poly(ethylene glycol): New Insights on synthesis and optimization

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Manuela Chiper ◽  
Richard Hoogenboom ◽  
Ulrich S. Schubert
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
Direct Synthesis ◽  
Synthesis Method ◽  
Water Soluble ◽  
Poly Ethylene Glycol ◽  
Full Characterization ◽  
Vis Spectroscopy ◽  
Poly Ethylene ◽  
The Stability

AbstractIn order to obtain linear and high molecular weight Ru(II) coordination polymers, we investigated the reaction conditions for the direct one-step metallopolymerization of bis-terpyridine poly(ethylene glycol) 3 with RuCl3 in the presence of reducing agents. Here we discuss the direct synthesis method, the optimization and the purification of the water soluble Ru(II) chain extended poly(ethylene glycol). The optimization of the metallo-polymerization was monitored by SEC. For the highest molecular weight Ru(II) coordination polymer 4 obtained in this study, full characterization was performed by 1H-NMR and UV-Vis spectroscopy as well as SEC proof for the formation and the stability of the designed structure

scholarly journals Blend Electrospinning of Poly(Ɛ-Caprolactone) and Poly(Ethylene Glycol-400) Nanofibers Loaded with Ibuprofen as a Potential Drug Delivery System for Wound Dressings

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Tabinda Riaz ◽  
Nabyl Khenoussi ◽  
Delia Mihaela Rata ◽  
Leonard Ionut Atanase ◽  
Dominique C. Adolphe ◽  
...  
Keyword(s):  
Drug Delivery ◽  
Ethylene Glycol ◽  
Drug Delivery System ◽  
Delivery System ◽  
Release Kinetics ◽  
Poly Ethylene Glycol ◽  
Vis Spectroscopy ◽  
Poly Ethylene ◽  
The Impact

Abstract Electrospinning (ES) is a versatile and diverse technique to fabricate nano and micro fibers that could be utilized as drug delivery systems. The aim of this research was the fabrication and characterization of drug loaded nanofibrous scaffold produced by single-needle ES using poly(Ɛ-caprolactone) (PCL) and poly(ethylene glycol-400) (PEG) and to investigate the potential of this material as a drug delivery system. A model drug, Ibuprofen (IBU), was used. Ibuprofen is a medicine that is a non-steroidal, anti-inflammatory drug (NSAID). Two concentrations of IBU, 5 wt% and 7 wt%, were incorporated for the ES of PCL and PCL/PEG nanofibers. Characterization of nanofibers was done by using Scanning Electron Microscopy (SEM), Differential Scanning Calorimeter (DSC), Thermogravimetric Analysis (TGA), and Water Contact Angle Measurements. The impact of IBU on nanofibers’ properties such as morphology, diameters, hydrophilicity, and tensile strength was investigated. Finally, the drug release kinetics of IBU from nanofibers was analyzed and their percentage release efficiency of IBU (RE%) was determined by UV-vis spectroscopy during 24 h.

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