| Summary: | 碩士 === 國立中央大學 === 化學工程與材料工程研究所 === 95 === Solvent quality of polymer solution is an important quality of polymer science, and it affects the thermodynamic parameter of polymer solution. However, in the context of a binary mixture of polymer and solvent, “the interaction parameter (χ)”represents the solvent quality. In this thesis, the “Isothermal Titration Calorimeter (ITC)” is applied to measure the χ parameter of polymer solution.
It is found that “the interaction parameter (χ)”of PEG、PVP、Dextran aqueous solution are negative and they are increased with increasing molecular weight of polymer solution. In addition to molecular weight effect, we has study the concentration effect. For PEG aqueous solution, χ parameter of different concentration is nearly constant. For PVP aqueous solution, in low concentration region, χ parameter is increased with increasing concentration of polymer solution. But in high concentration region, χ parameter is nearly constant.
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