Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/2264
Title: Crosslinked polyurethane-based gels
Authors: Phung, H
Schacht, E
Du Prez, F
GELAN, Jan 
ADRIAENSENS, Peter 
STORME, Liesbet 
Issue Date: 2003
Publisher: SOC POLYMER SCIENCE JAPAN
Source: POLYMER JOURNAL, 35(4). p. 353-358
Abstract: Crosslinked polyurethanes (CPUs) were synthesized by reaction of (ethylene oxide-propyleneoxide-ethyleneoxide) (EO-PO-EO) triblock copolymer with diisocyanate and a low molecular weight triol as a crosslinking agent. The short diol was used as a chain extender. The effect of some factors such as the nature and content of PAOs, short diol chain extender and triol crosslinking agent on the phase separation of CPUs was studied by infrared spectroscopy (IR) and differential scanning calorimetry (DSC). The presence of amine group-containing compounds favors the phase separation of CPUs. The swelling behavior of CPUs in the different media such as aqueous solution and ethanol (EtOH)-water mixture has been investigated. The CPUs show the negatively thermosensitive swelling behavior. The collapsing swelling process in response to the change in environmental temperature was observed in CPUs prepared from EO-PO-EO triblock copolymer having a commercial code L92. In a EtOH-water mixture, CPUs reached the maximum swelling degree at the ratio EtOH/water congruent to 80/20 at the whole range of the environmental temperature due to the coupling effect.
Notes: State Univ Ghent, Dept Organ Chem, B-9000 Ghent, Belgium. State Univ Ghent, Inst Biomed Technol, B-9000 Ghent, Belgium. Univ Limburg, Inst Mat Res IMO, Dept SBG, B-3590 Diepenbeek, Belgium.Phung, H, Minist Ind, Dept Sci & Technol, 54 Hai Ba Trung St, Hanoi, Vietnam.
Keywords: gels; crosslinked polyurethane; phase separation; swelling behavior; coupling effect
Document URI: http://hdl.handle.net/1942/2264
ISSN: 0032-3896
e-ISSN: 1349-0540
DOI: 10.1295/polymj.35.353
ISI #: 000183417900003
Category: A1
Type: Journal Contribution
Validations: ecoom 2004
Appears in Collections:Research publications

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