Abstract
Reduction and temperature-responsive gels were prepared by crosslinking poly(hydroxyethyl acrylate-co-methyl methacrylate) (poly(HEA-co-MMA)) using hydroxyethyl disulfide-bis-glycidyl ether(HEDSGE) as a disulfide cross-linker. Poly(HEA-co-MMA) exhibited lower critical solution temperature (LCST) behavior when MMA content was 7.4 and 8.3 mole %. Energy dispersive X-ray and Raman spectroscopy revealed that the copolymer chains of the gels were cross-linked by disulfide bond (i.e., HEDSGE). The gels released their content in proportion to the concentration of a reducing agent (i.e., dithiothreitol). In addition, the gels released their payloads in a temperature dependent manner, possibly due to the LCST property of the copolymer. Highlights Reduction and thermo-responsive gels were prepared by crosslinking poly(HEA-co-MMA) using HEDSGE. Poly(HEA-co-MMA) exhibited LCST behavior when MMA content was 7.4 mole % and 8.3 mole %. Gels released their content in proportion to dithiothreitol (a reducing agent) concentration. Gels released their payloads in a temperature dependent manner.
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