期刊
ARABIAN JOURNAL OF CHEMISTRY
卷 10, 期 4, 页码 539-547出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.arabjc.2013.11.027
关键词
Poly(acrylamide-co-acrylic acid); pH sensitive hydrogel; Glass temperature; Rheological behavior; Dynamic oscillation test; Swelling
Poly(acrylamide-co-acrylic acid) poly(AAm-co-AAc) hydrogels were prepared by free radical polymerization initiated by redox initiators of ammonium peroxodisulphate (APS) and N, N, N', N'-tetramethyl ethylene diamine (TEMED); N, N'-methylene bisacrylamide (BIS) was employed as a crosslinking agent. The copolymers were characterized by infrared spectroscopy (FT-IR), differential scanning calorimetry (DSC), dynamic rheology and swelling measurements. Results indicated that the strong interaction in the hydrogels resulted in the formation of a more stable copolymer. The single glass transition temperature (T-g) in sample suggested that the two polymers into the hydrogel have a good miscibility. The elastic modulus (G') and linear viscoelastic region increased with increase in PAAc concentration. The oscillation time sweep study of the hydrogels exhibited a flat G' indicating a stable structure and good mechanical strength. In the swelling measurements, the gels exhibited appreciable water uptake and were highly sensitive to pH environment. So the poly(AAm-co-AAc) hydrogel will have promising application in pharmaceutical use and in biomaterials. (C) 2013 King Saud University. Production and hosting by Elsevier B.V.
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