Segmental dynamics of poly(methyl acrylate)-d3 adsorbed on anopore: A deuterium NMR study

Macduff O. Okuom, Burak Metin, Frank D. Blum

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

The segmental dynamics of poly(methyl acrylate-d3) (PMA-d 3) adsorbed in the pores of anopore membranes has been investigated using deuterium NMR over the temperature range 25-80 °C. The onset of the NMR glass-transition temperature (Tg) for the adsorbed samples was approximately 15 °C higher than that for the bulk sample. The adsorbed polymer contained segments with restricted mobility (glassy), even at the highest temperatures studied, at which the bulk polymer showed only mobile segments. The spectra from samples with different adsorbed amounts of PMA-d 3, between 1.1 and 4.2 mg/m2, were similar in their temperature-dependent mobilities. Neither was there much difference in the spectra of PMA-d3 on anopore samples with pore sizes of 0.2 and 0.02 μm. However, for a solvent-washed sample with an adsorbed amount of 0.7 mg/m2, additional restriction in PMA-d3 mobility was observed.

Original languageEnglish (US)
Pages (from-to)2539-2544
Number of pages6
JournalLangmuir
Volume24
Issue number6
DOIs
StatePublished - Mar 18 2008

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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