ADSORPTION STUDIES OF DIFFERENT END-FUNCTIONALIZED LINEAR POLY(DIMETHYLSILOXANE)

Research output: Contribution to journalArticle

Author(s)

  • A Patel
  • T Cosgrove
  • J A Semlyen
  • J R P Webster
  • J M H M Scheutjens

Department/unit(s)

Publication details

JournalColloids and surfaces a-Physicochemical and engineering aspects
DatePublished - 28 Jul 1994
Issue number1
Volume87
Number of pages10
Pages (from-to)15-24
Original languageEnglish

Abstract

The adsorption of end-functionalised poly(dimethylsiloxane) (PDMS), of both low and high molecular weight, on to silica and alumina from carbon tetrachloride has been investigated by Fourier transform infrared spectroscopy. It was found that the adsorbed amounts of these end-functionalised PDMS depend strongly on the composition of the polymer; samples with end groups having a high surface affinity were found to adsorb to a greater extent. Detailed information on the structure of the adsorbed layer obtained by the Scheutjens-Fleer theoretical model and a Monte Carlo simulation indicated that polymers with such end groups adsorb primarily as loops, with fewer segments in trains and tails compared with a homopolymer. Adsorption was found to be greater on alumina than on silica for both molecular weight series.

    Research areas

  • ADSORPTION, ALUMINA, FOURIER TRANSFORM INFRARED SPECTROSCOPY, FUNCTIONAL END GROUPS, LOOPS, SCHEUTJENS-FLEER MODEL, SILICA, CHAINS, COPOLYMERS, INTERFACE, KINETICS, MIXTURES, SURFACES, SOLVENT, MODEL

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