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Conformational Change of Grafted Polymer Chains

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QCM-D Studies on Polymer Behavior at Interfaces

Part of the book series: SpringerBriefs in Molecular Science ((BRIEFSMOLECULAR))

Abstract

Based on the “grafting from” and “grafting to” methods, polymer chains are grafted onto the resonator surfaces. QCM-D is used to investigate the conformational change of grafted chains induced by the variation of external conditions. For the grafted poly(N-isopropylacrylamide) (PNIPAM) chains, the QCM-D studies show that the conformational change of grafted PNIPAM chains induced by the variations of temperature and solvent composition is fundamentally different from that for the free PNIPAM chains in solution and the grafting density plays an important role in the conformational change. For the grafted polyelectrolytes, the chemical oscillation induced periodic collapse and swelling of poly (acrylic acid) brushes and the pH-induced folding of DNA with different grafting densities are discussed in detail with the QCM-D results. The influences of salt concentration and salt type on the conformational change of grafted polyelectrolytes are also discussed in this chapter. The studies demonstrate that QCM-D can provide not only the changes in mass and rigidity of the grafted polymer chains, but also the changes in hydrodynamic thickness, shear viscosity, and shear modulus of the grafted polymer layer, which would give a clear picture on the conformational change of the grafted polymer chains.

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Authors and Affiliations

  1. Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, People’s Republic of China

    Guangming Liu

  2. South China University of Technology, Guangzhou, 510640, People’s Republic of China

    Guangzhao Zhang

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  1. Guangming Liu
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  2. Guangzhao Zhang
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Correspondence to Guangming Liu .

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Liu, G., Zhang, G. (2013). Conformational Change of Grafted Polymer Chains. In: QCM-D Studies on Polymer Behavior at Interfaces. SpringerBriefs in Molecular Science. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-39790-5_2

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