Synthesis of Poly(ethylene oxide)s with 1,2,4-Triazol-4-yl End Groups– Macroligands for Bistable Metal-Polymer Complexes

2004 ◽  
Vol 25 (9) ◽  
pp. 911-915 ◽  
Author(s):  
Robert Saf ◽  
Gerald Schwarzenbacher ◽  
Christian Mirtl ◽  
Gertraud Hayn ◽  
Josefine Hobisch ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Polymer Complexes ◽  
End Groups ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Metal Polymer

Characterization of Hyaluronic Acid-Poly(Ethylene Oxide) Hydrogel Dependent upon Poly(Ethylene Oxide)

2007 ◽  
Vol 342-343 ◽  
pp. 749-752
Author(s):  
Mi Sook Kim ◽  
Yoon Jeong Choi ◽  
Gun Woo Kim ◽  
In Sup Noh ◽  
Yong Doo Park ◽  
...  
Keyword(s):  
Hyaluronic Acid ◽  
Ethylene Oxide ◽  
Thiol Groups ◽  
Molecular Weights ◽  
Hydrogel Network ◽  
End Groups ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Surface Morphologies

Characterization of an hyaluronic acid (HA)-poly(ethylene oxide) (PEO) hydrogel was performed by changing the number of side arms in a PEO molecule. Verification of grafting chemistry and mechanical strength, as well as swelling behaviors and surface morphologies of the HA-PEO hydrogels were analyzed by employing different x-linking molecular weights (MW) of PEO ranging from 1.7 to 5.0 kDa at a fixed low MW HA in the hydrogel network. Methacrylation to the HA successfully obtained via Michael type reaction between the methacrylate arm groups in HA and the thiol end groups in PEO was observed by XPS. Hydrogel formation was markedly dependent upon the numbers of thiol groups in the PEO molecule. Furthermore the lower MW PEO-based HA hydrogel demonstrated stronger mechanical properties but lower water absorption and the smaller pore sizes on its surface and cross section.

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