Molecular Motion in Poly(vinylmethylsiloxane)

ORAL

Abstract

Responsive surfaces~change their physico-chemical characteristics upon the introduction of external stimuli. Modified poly(vinylmethylsiloxane) (PVMS) networks have been shown to exhibit rapid wettability changes due to surface reconstruction~ upon exposure to water [Crowe, J.A.; Genzer, J., J. Am. Chem. Soc. 127, 17610-17611 (2005)].~We aim~to correlate the dynamics of the side and backbone motion within the modified PVMS networks to the observed surface chemistry rearrangement. Polymer samples were placed upon interdigitated electrodes and dielectric relaxation spectroscopy, as a function of temperature, was conducted. This technique allows us to probe the network and see changes in molecular motion as a function of temperature and network composition.~ Dynamic mechanical analysis (DMA) was also performed and coincided well with the dielectric results. The side chain motion and their effect on the response of the PVMS network will be discussed.

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Authors

  • Derrick Stevens

    North Carolina State University, Physics Department, Raleigh, NC

  • Rebecca Scott

    UCSB, LBNL, NCSU, University of North Carolina at Chapel Hill, Wright State University, Department of Physics, The University of Memphis, TN 38152, North Carolina State University, Department of Chemical and Biomolecular Engineering, Raleigh, NC, Clemson University, Fisk University, University of North Dakota (Grand Forks), Southern Illinois University, The University of Tennessee Space Institute, SC Governor's School for Science and Mathematics, Francis Marion University, University of North Alabama, Lousiana State University, Department of Physics, Dhaka University, Dhaka, Bangladesh, Head of Government Relations, American Physical Society, Vanderbilt University, Mississippi State University, Emory University, College of William and Mary, University of Tennessee Space Institute, Morehead State University

  • Rebecca Scott

    UCSB, LBNL, NCSU, University of North Carolina at Chapel Hill, Wright State University, Department of Physics, The University of Memphis, TN 38152, North Carolina State University, Department of Chemical and Biomolecular Engineering, Raleigh, NC, Clemson University, Fisk University, University of North Dakota (Grand Forks), Southern Illinois University, The University of Tennessee Space Institute, SC Governor's School for Science and Mathematics, Francis Marion University, University of North Alabama, Lousiana State University, Department of Physics, Dhaka University, Dhaka, Bangladesh, Head of Government Relations, American Physical Society, Vanderbilt University, Mississippi State University, Emory University, College of William and Mary, University of Tennessee Space Institute, Morehead State University

  • Laura Clarke