A quantitative analyses of the viscometric data of the coil-to-globule and globule-to-coil transition of poly(N-isopropylacrylamide) in water |
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Authors: | Hu YangRongshi Cheng Zhiliu Wang |
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Affiliation: | Key Laboratory for Mesoscopic Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Nanjing University, 22 HanKou Road, Nanjing 210093, China |
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Abstract: | The coil-to-globule and globule-to-coil transition of poly(N-isopropylacrylamide) in aqueous solution had been studied by heating and cooling the sample solution with conventional viscosity measurement. A single chain collapsed globule solution was prepared firstly by adding sodium n-dodecyl sulfate (SDS) into the polymer solution at room temperature, as the chain collapsed to compact globule at higher temperature and then the SDS was removed by electro-dialysis. The viscosity data were analyzed in a quantitative way, which permitted to elucidate the transition temperature and the amount of the water in the collapsed globule precisely. |
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Keywords: | Poly(N-isopropylacrylamide) Globule-to-coil transition Viscosity |
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