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Hydrogen bonding on the interface and in the bulk of a poly(2-methoxyethyl acrylate) (PMEA) thin film has been investigated by sum frequency generation, infrared reflection absorption, and Raman scattering measurements in different kinds of solutions containing hydrogen-bonding donators. These results indicate that the majority of the carbonyl groups on the PMEA surface are hydrogen-bonded with water or ethanol molecules, while the PMEA bulk is still dominated by the free carbonyl group.
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Li et al. (2004) studied this question.
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