Surface enrichment in polystyrene/poly(vinyl methyl ether) blends. 3. An analysis of the near-surface composition profile

J. M G Cowie, B. G. Devlin, I. J. McEwen

Research output: Contribution to journalArticle

Abstract

An expression is developed to express experimental ATR infrared absorbance ratios arising from surface enrichment in poly(vinyl methyl ether) (PVME)/polystyrene (PS) blends. Blend surfaces are enriched with PVME, which has the lower surface energy, and are found to have a characteristic depth of order 0.25 × 10-6 m. The effect of stabilizing the blends by hydrogen bonding leads to a reduction in surface enrichment. The surface excess is also calculated using a simplified mean-field approach, and these are compared with experiment. The limitations of ATR spectroscopy for surface studies are highlighted. © 1993 American Chemical Society.

Original languageEnglish
Pages (from-to)5628-5632
Number of pages5
JournalMacromolecules
Volume26
Issue number21
Publication statusPublished - 1993

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