In situ kinetics and thermodynamics of polymer adsorption on chemically modified silica

Lawrence A. Zazzera, Matt Tirrell, John F Evans

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In situ Fourier transform infrared (FT-IR) spectroscopy in an attenuated total reflection mode has been employed to examine the chemical modification of ozone-cleaned, native oxide on single crystal Si(100). This planar model for silica is subjected to solution modification using silane reagents which impart variable polarity to the modified surface through different termini of the modifier. These chemical modifications are followed in real time using FT-IR as a diagnostic of surface preparation; either by examining the appearance of a band for an IR chromophore of the modifier which is attached, or by monitoring the loss of the surface silanol groups consumed in the reaction. Following modification, polymer solutions (acrylates, siloxanes) are introduced into the cell and the dynamics of the adsorption followed by a chromophore of the polymer. Not only can the total amount of bound polymer be determined, but also in cases of strong interactions between the polymer and surface modified (e.g., OH···O = C) the bound fraction can be determined. Correlations between surface polarity and these experimentally determined quantities give insight in to the configuration(s) of the adsorbed polymers.

Original languageEnglish (US)
Title of host publicationPolymer/Inorganic Interfaces
PublisherPubl by Materials Research Society
Pages125-130
Number of pages6
Volume304
ISBN (Print)1558992006
StatePublished - Apr 14 1993
EventMaterials Research Society Spring Meeting - San Francisco, CA, USA
Duration: Apr 12 1993Apr 15 1993

Other

OtherMaterials Research Society Spring Meeting
CitySan Francisco, CA, USA
Period4/12/934/15/93

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    Zazzera, L. A., Tirrell, M., & Evans, J. F. (1993). In situ kinetics and thermodynamics of polymer adsorption on chemically modified silica. In Polymer/Inorganic Interfaces (Vol. 304, pp. 125-130). Publ by Materials Research Society.