• Title/Summary/Keyword: 유변성질

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Thixotropic Properties of Polyacrylamide Hydrogels with Various Synthetic Conditions (합성조건에 따른 Polyacrylamide 수화 겔의 흐름변성 성질)

  • Kim, Nam-Jeong
    • Journal of the Korean Chemical Society
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    • v.50 no.6
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    • pp.447-453
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    • 2006

  • of synthetic conditions and water content on rheological properties of polyacrylamide hydrogels were studied. The non-Newtonian flow curves of polyacrylamide hydrogels were obtained by using a cone-plate rheometer. The rheological parameters were obtained by applying non-Newtonian equation to the flow curves for polyacrylamide hydrogels. The polyacrylamide hydrogels are shear thinning under increasing shear rate modes which result in thixotropic behavior. These flow properties are controlled by the characteristics of flow units and the interaction among the flow segments.

  • https://doi.org/10.5012/jkcs.2006.50.6.447 인용 PDF KSCI KPUBS HTML

Thixotropic Equation and Rheological Parameters on Non-Newtonian Flow Mechanism (비 뉴톤 유동 메카니즘에서 틱소트로피 식과 유변 파라메타)

  • Kim, Nam Jeong
    • Journal of the Korean Applied Science and Technology
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    • v.32 no.3
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    • pp.386-393
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    • 2015

  • The rheological properties of complex materials such as colloid dispersion show complicated non-Newtonian flow phenomena when they are subjected to shear flow. These flow properties are controlled by the characteristics of flow units and the interactions among the flow segments. The rheological parameters of relaxation time $({\beta}_2)_0$, structure factor $C_2$ and shear modulus $X_2/{\alpha}_2$ for various thixotropic flow curves was obtained by applying thixotropic equation to flow curves. The variations of rheological parameters are directly related to non-Newtonian flows, viscosities and activation energies of flow segments.

  • https://doi.org/10.12925/jkocs.2015.32.3.386 인용 PDF KSCI