期刊
E-POLYMERS
卷 14, 期 5, 页码 335-343出版社
WALTER DE GRUYTER GMBH
DOI: 10.1515/epoly-2014-0070
关键词
2-Acrylamido-2-methyl-1-propane sulfonic acid (AMPS); 2-hydroxyethylmethacrylate (HEMA); 2-(N,N-dimethylamino)ethyl methacrylate (DMAEMA); butylamine (BA); gels; room temperature ionic liquid (RTIL)
Two polymerizable room temperature ionic liquids (RTIL), AMPS-BA and AMPS-DMAEMA, were synthesized by neutralization of 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) with butylamine (BA) and 2-(N,N-dimethylamino) ethyl methacrylate (DMAEMA), respectively, in acetone, followed by evaporation of the solvent under a reduced pressure at room temperature. The RTILs were characterized by differential scanning calorimetry to determine their glass transition temperatures (T-g). Co-polymeric gels of the RTILs with 2-hydroxyethylmethacrylate (HEMA) were prepared by aqueous solution polymerization using N,N'-methylenebisacrylamide (MBAm) as a cross-linker and ammonium persulfate as an initiator. The superabsorbency of the gels in water and various organic solvents was gravimetrically investigated. The results showed that the T-g of AMPS-BA and AMPS-DMAEMA was -47.7 degrees C and -45.8 degrees C, respectively. Poly(AMPS-BA-co-HEMA) gels exhibited superabsorbency in both water and various organic solvents, while poly(AMPS-DMAEMA-co-HEMA) gels did not swell in any liquids. The mechanism for the swelling difference between poly(AMPS-BA-co-HEMA) gels and poly(AMPS-DMAEMA-co-HEMA) gels was critically discussed.
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