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

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

doi:10.1021/la703103j

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 journal › Article › peer-review

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 (T_g) 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 language	English (US)
Pages (from-to)	2539-2544
Number of pages	6
Journal	Langmuir
Volume	24
Issue number	6
DOIs	https://doi.org/10.1021/la703103j
State	Published - Mar 18 2008
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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10.1021/la703103j

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

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.",

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T1 - Segmental dynamics of poly(methyl acrylate)-d3 adsorbed on anopore

T2 - A deuterium NMR study

AU - Okuom, Macduff O.

AU - Metin, Burak

AU - Blum, Frank D.

PY - 2008/3/18

Y1 - 2008/3/18

N2 - 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.

AB - 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.

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

Abstract

ASJC Scopus subject areas

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