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Study on Thermal Properties of CdS - Embedded Poly(2-Acetamidoacrylic acid) Hydrogel Composite  

Park, Chun-Ho (Department of Polymer Science and Engineering, Pusan National University)
Ha, Eun-Ju (Department of Polymer Science and Engineering, Pusan National University)
Jung, Jong-Mo (LG Chem. LTD. Research Park, CRD Research Institute)
Lee, Jang-Oo (Department of Polymer Science and Engineering, Pusan National University)
Paik, Hyun-Jong (Department of Polymer Science and Engineering, Pusan National University)
Publication Information
Polymer(Korea) / v.33, no.1, 2009 , pp. 1-6 More about this Journal
Abstract
We report the template-based synthesis of well-dispersed CdS nanoparticles (NPs) in the interior of poly (2-acetamidoacrylic acid) (PAAA) hydrogel as a novel type of nanocomposite without particle aggregation via ion exchange in a aqueous system. As revealed by the TEM image analysis, the mean crystallite diameter of CdS NPs embedded in hydrogel composite was 4.5 nm, and the composite did not suffer any observable change after 6 months. Desorption/decomposition of CdS/PAAA hydrogel composite was studied by evolved gas analysis-gas chromatography-mass spectrometry (EGA-GC-MS), and thermogravimetric analysis (TGA) methods. From the TGA data, the thermal stability of the composite system increased by ca. 100 $^\circ$C and the content of CdS NPs in a dry composite gel was over 70 wt%. In addition, the chemical pathway was proposed for the entire decomposition process.
Keywords
CdS nanoparticles; poly(2-acetamide acrylic acid) hyrogels; thermal stability; evolved gas analysis (EGA);
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