Synthesis and rheology of thermoreversible polyurethane hydrogels

• Authors: Luiza Gradinaru , Constantin Ciobanu , Stelian Vlad , Maria Bercea , Marcel Popa
• Languages of publication: EN

Abstracts

EN

Polyurethanes based on poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer, succinic or citric acid, and ethyl ester L-lysine diisocyanate were synthesized and characterized by FT-IR and GPC. Wetting properties were evaluated by contact angle determinations. The critical micelle concentration was determined from surface tension measurements. Their abillity to undergo self-aggregation and temperature induced gelation was investigated through dynamic oscillatory measurements. The gelation point, sol-gel transitions, and gel structure are influenced by polymer structure, composition, molecular weight, concentration, and heating rate. [...]

Keywords

EN

Polyurethane hydrogel; Thermoreversible behaviour; Critical micelle concentration; Sol-gel transitions

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2012
• Volume: 10
• Issue: 6
• Pages: 1859-1866

Dates

published

1 - 12 - 2012

online

21 - 9 - 2012

Contributors

author

Luiza Gradinaru

author

Constantin Ciobanu

• ”Petru Poni” Institute of Macromolecular Chemistry, 700487, Iasi, Romania

author

Stelian Vlad

• ”Petru Poni” Institute of Macromolecular Chemistry, 700487, Iasi, Romania

author

Maria Bercea

• ”Petru Poni” Institute of Macromolecular Chemistry, 700487, Iasi, Romania

author

Marcel Popa

• Faculty of Chemical Engineering and Environmental Protection, ”Gh. Asachi” Technical University, 700050, Iasi, Romania

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Identifiers

DOI

10.2478/s11532-012-0100-8