Cross-linking density alters early metabolic activities in chondrocytes encapsulated in poly(ethylene glycol) hydrogels and cultured in the rotating wall vessel

2009 ◽  
Vol 102 (4) ◽  
pp. 1242-1250 ◽  
Author(s):  
Idalis Villanueva ◽  
Brenda J. Klement ◽  
Daniel von Deutsch ◽  
Stephanie J. Bryant
Keyword(s):  
Ethylene Glycol ◽  
Cross Linking ◽  
Poly Ethylene Glycol ◽  
Rotating Wall ◽  
Rotating Wall Vessel ◽  
Metabolic Activities ◽  
Poly Ethylene

Cross-linking of cellulose and poly(ethylene glycol) with citric acid

2015 ◽  
Vol 90 ◽  
pp. 21-24 ◽  
Author(s):  
Pamela de Cuadro ◽  
Tiina Belt ◽  
Katri S. Kontturi ◽  
Mehedi Reza ◽  
Eero Kontturi ◽  
...  
Keyword(s):  
Citric Acid ◽  
Ethylene Glycol ◽  
Cross Linking ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Preparation and Properties of a Hydrolytically Stable Cyclooctyne-Containing Polymer

Synlett ◽  
2018 ◽  
Vol 29 (19) ◽  
pp. 2535-2541
Author(s):  
Alex Adronov ◽  
Kelvin Li ◽  
Stuart McNelles
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
Monomethyl Ether ◽  
Phenylene Vinylene ◽  
Cross Linking ◽  
Poly Ethylene Glycol ◽  
Ethylene Glycol Monomethyl Ether ◽  
Glycol Monomethyl Ether ◽  
Poly Ethylene

A poly[(phenylene vinylene)-co-dibenzocyclooctyne] polymer prepared by Wittig polymerization chemistry between dibenzocyclooctyne bisaldehyde [DIBO-(CHO)2] and bis(triethyleneglycol)phenylbis(tributylphosphonium) dibromide is reported. The resulting polymer exhibits moderate molecular weight (Mn: 10.5 kDa, Mw: 21.3 kDa, Ð: 2.02) and is fluorescent. It could be readily functionalized by strain-promoted alkyne-azide cycloadditon with different azides, and fluorescence of the polymer was preserved after functionalization. Grafting azide-terminated 5 kDa poly(ethylene glycol) monomethyl ether chains drastically affected the solubility of the polymer. Cross-linking the polymer with poly(ethylene glycol) that was terminated at both ends with azide groups gave access to a fluorescent organogel that could be dried and reswollen with water to form a hydrogel.

Synthesis of Sulfhydryl Cross-Linking Poly(Ethylene Glycol)-Peptides and Glycopeptides as Carriers for Gene Delivery†

2002 ◽  
Vol 13 (2) ◽  
pp. 232-239 ◽  
Author(s):  
Youmie Park ◽  
Kai Y. Kwok ◽  
Chawki Boukarim ◽  
Kevin G. Rice
Keyword(s):  
Gene Delivery ◽  
Ethylene Glycol ◽  
Cross Linking ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Dual mode gelation behavior of silk fibroin microgel embedded poly(ethylene glycol) hydrogels

2016 ◽  
Vol 4 (26) ◽  
pp. 4574-4584 ◽  
Author(s):  
S. Ryu ◽  
H. H. Kim ◽  
Y. H. Park ◽  
C.-C. Lin ◽  
I. C. Um ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Silk Fibroin ◽  
Cross Linking ◽  
Poly Ethylene Glycol ◽  
Dual Mode ◽  
Hydrogel Formation ◽  
Gelation Behavior ◽  
Poly Ethylene

Hydrogel formation by more than two cross-linking mechanisms is preferred for the sophisticated manipulation of hydrogel properties.

Enhancement of Mechanical Properties Upon Hydration in Copolymers of PEG and Iodinated Tyrosine-derived Poycarbonates

2008 ◽  
Vol 1132 ◽  
Author(s):  
F. Bedoui ◽  
L. K. Widjaja ◽  
A. Luk ◽  
D. Bolikal ◽  
N. S. Murthy ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Ethylene Glycol ◽  
Ethyl Ester ◽  
Opposite Effect ◽  
Polymeric Materials ◽  
Cross Linking ◽  
Poly Ethylene Glycol ◽  
Reinforcing Effect ◽  
Poly Ethylene

ABSTRACTIncrease in modulus upon hydration in copolymers of desaminotyrosyl-tyrosine ethyl ester (DTE) and poly(ethylene glycol) (PEG) with iodinated tyrosines, poly(I2DTE-co-PEG carbonate)s, was investigated by varying the fraction and the molecular weight of the hydrophilic PEG component. Water, as expected, acts as plasticizer in polymer with PEG content < 15 wt% and > 30 wt%. But, water has the opposite effect in iodinated polymers with moderate PEG contents, between 15 to 20 wt%: it enhances the Young's modulus. The strength and modulus of hydrated poly(I2DTE-co-15%PEG2K carbonate)s increased by as much as fifteen fold upon hydration. While the decrease in the mechanical properties in most polymeric materials with diluents such water is due to the solvent-induced swelling, the increase in strength and modulus that is observed is most likely due to the reinforcing effect of the increased cross-linking efficiency of the hydrated PEG domains in the iodinated polymer.

Preparation and Characterization of pH Responsive Complex Micelles with Dynamic Boronate Cross-Linking

2019 ◽  
Vol 944 ◽  
pp. 557-564
Author(s):  
Jia Ming Xu ◽  
Dan Yue Wang ◽  
Han Tong ◽  
Xiao Ze Jiang ◽  
Mei Fang Zhu
Keyword(s):  
Ethylene Glycol ◽  
Phenylboronic Acid ◽  
Proton Nuclear Magnetic Resonance ◽  
Cross Linking ◽  
Ph Responsive ◽  
Poly Ethylene Glycol ◽  
Boronate Ester ◽  
H Nmr ◽  
Poly Ethylene ◽  
Complex Micelles

Two kinds of diblock copolymers containing glucose and phenylboronic acid moieties, respectively, poly (ethylene glycol)-b-poly (gluconamidoethyl methacrylate) (PEG-b-PGAMA) and poly (ethylene glycol)-b-poly (2-aminoethyl methacrylate-co-3-nitrophenyboronic acid methacrylate) (PEG-b-P(AMA-co-NPBMA)) were synthesized via atom transfer radical polymerization (ATRP) and post polymerization modification (PPM). Well-defined structure and narrow molecular weight distribution of the polymers were confirmed by proton Nuclear Magnetic Resonance (1H NMR) and Gel Permeation Chromatography (GPC). Based on the cross-linking between the diol groups of the glycopolymer and phenylboronic acid under physiological pH (7.4), complex micelles composed of PEG outer shell and boronate ester cross-linking core with a hydrodynamic diameter around 20nm were formed. Morphology, size and assembly behavior of the complex micelles were investigated by 1H NMR, transmission electron microscopy (TEM) and dynamic light scattering (DLS). The results showed the formation/cleavage of boronate ester linkage is reversible upon the variation of solution pH, the complex micelles displayed pH sentiveties of assembling/disassembling behavior. Above pH 7.4, stable spherical micelles can be formed, whereas pH less than 5.5, the micelles dissociated into unimers. Therefore, such pH-responsive micelles based on dynamic complexation of phenyl boronate bonds are expected to be applied to pH-responsive nanodrug carriers

Synthesis and applications of tetra-functional branched poly(ethylene glycol) derivative for the decellularized valve leaflets cross-linking

2015 ◽  
Vol 30 (1) ◽  
pp. 193-197 ◽  
Author(s):  
Xingjian Hu ◽  
Nianguo Dong ◽  
Jiawei Shi ◽  
Huadong Li ◽  
Cheng Deng ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Cross Linking ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene
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