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논문 기본 정보

자료유형
학술저널
저자정보
Shekhar, Suman (Department of Chemical and Polymer Engineering, Birla Institute of Technology) Mukherjee, M. (Department of Chemical and Polymer Engineering, Birla Institute of Technology) Sen, Akhil Kumar (Department of Chemical and Polymer Engineering, Birla Institute of Technology)
저널정보
테크노프레스 Advances in materials research : AMR Advances in materials research : AMR 제1권 제4호
발행연도
2012.1
수록면
269 - 284 (16page)

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Thermoresponsive hydrogels based on N-Isopropylacrylamide (NIPAM) and 2-Hydroxyethylacrylate (HEA) were prepared by free radical polymerization. The hydrogels were characterized by elemental (CHN) analysis, differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA). DSC thermogram showed two endothermic transitions which are due to hydration of water present in different environments. One near $0^{\circ}C$ called melting transition of ice and was used to calculate the quantitative determination of the amounts of freezing and non freezing water. The other transition above the ambient temperature was due to the combination of hydrophobic hydration and hydrophilic hydration which changes with the copolymer compositions. Swelling and deswelling studies of the hydrogels were carried out using the aqueous media, salt and urea solutions. The experimental results from swelling studies revealed that copolymers have lower rates of swelling and deswelling than the homopolymer.

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