Effect of glass transition temperature (Tg) on the absorption of bisphenol A in poly(acrylate)s thin films

Shigeaki Morita, Shen Ye, Guifeng Li, Masatoshi Osawa

Research output: Contribution to journalConference articlepeer-review

22 Citations (Scopus)


The absorption of bisphenol A (BPA) in several poly(acrylate)s thin films such as poly(n-butyl methacylate) (PBMA) and poly(methyl methacrylate) (PMMA) as well as in a non-acrylate polymer, deuterated polystyrene (dPS) has been investigated as a function of temperature by infrared reflection absorption spectroscopy (IRRAS) and sum frequency generation (SFG) measurements. IRRAS results show that BPA was absorbed in the bulk of both PBMA and PMMA when the absorption temperature was higher than the glass transition temperature (T g) of the polymer. The absorption rate of BPA became very low at the temperature lower than the Tg. Furthermore, SFG measurement, which is known as a surface sensitive vibrational spectroscopy, demonstrated that BPA was adsorbed on the surfaces of PMMA and PBMA even at the temperature lower than their Tg. However, absorption of BPA was observed neither in the dPS bulk nor on its surface even at the temperature higher than its Tg. IRRAS measurements show that the hydrogen bonding was formed between the poly(acrylate)s and BPA but was not observed between the dPS and BPA. We conclude that not only the Tg but also the chemical interaction between the polymer and BPA plays important roles in the BPA absorption process.

Original languageEnglish
Pages (from-to)15-19
Number of pages5
JournalVibrational Spectroscopy
Issue number1-2
Publication statusPublished - 2004 Jun 17
Externally publishedYes
EventThe 2nd International Conference on Advanced Vibrational Spectroscopy - Nottingham, United Kingdom
Duration: 2003 Aug 242003 Aug 29


  • Bisphenol A (BPA)
  • Glass transition temperature (T)
  • Hydrogen bonding
  • Infrared reflection absorption spectroscopy (IRRAS)
  • Polymer
  • Sum frequency generation (SFG)

ASJC Scopus subject areas

  • Spectroscopy


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