Structural changes in poly(2-methoxyethyl acrylate) thin films induced by absorption of bisphenol A. An infrared and sum frequency generation (SFG) study

Shen Ye, Shigeaki Morita, Guifeng Li, Hiroyuki Noda, Masaru Tanaka, Kohei Uosaki, Masatoshi Osawa

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

The structural changes in poly(2-methoxyethyl acrylate) (PMEA) thin films induced by the absorption of bisphenol A (BPA), which is suspected to be an endocrine disrupter disturbing the hormone balance in a living body, have been investigated by infrared reflection absorption spectroscopy (IRRAS) and sum frequency generation (SFG) measurements. BPA molecules are absorbed in PMEA thin film. By controlling the thickness of the intermediate polystyrene (PS) film between the PMEA and Au substrate, we are able to probe the molecular structure at the different PMEA interfaces of air/PMEA (free) and PMEA/PS (buried) by the SFG measurements. The ether methyl (OCH3) group in the side chain of PMEA at both interfaces has the same vector orientation with respect to Au, i.e., pointing into air at the free interface and pointing into PMEA at the PMEA/PS buried interface. The OCH3 groups at the PMEA interfaces are likely to stand up and that the interfacial ordering on the PMEA is increased by the BPA absorption. The structural changes in the PMEA bulk and its interface induced by BPA absorption and desorption are reversible.

Original languageEnglish
Pages (from-to)5694-5703
Number of pages10
JournalMacromolecules
Volume36
Issue number15
DOIs
Publication statusPublished - 2003 Jul 29
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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