Ultrafast Dynamics Experienced by Carbon Dioxide Diffusing through Polymer Matrices

Cynthia G. Pyles; Grace M. Gretz; Ivan C. Spector; Aaron M. Massari

doi:10.1021/acs.jpcb.1c04223

Ultrafast Dynamics Experienced by Carbon Dioxide Diffusing through Polymer Matrices

Cynthia G. Pyles, Grace M. Gretz, Ivan C. Spector, Aaron M. Massari

Chemistry (Twin Cities)

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Fourier transform infrared, pump-probe polarization anisotropy, and two-dimensional infrared spectroscopies were used to study the steady-state and time-dependent behavior of carbon dioxide dissolved in three different polymer systems. Gas reorientation dynamics in poly(methyl methacrylate), poly(methyl acrylate), and poly(dimethylsiloxane) were sensitive to the nature of chemical interactions between the gas and polymer, as well as whether the polymer was in a glassy or rubbery phase. The homogeneous dynamics experienced by the asymmetric stretching vibration were found to be fastest for rubbery polymers with weak, nonspecific gas-polymer interactions. Spectral diffusion was absent for the carbon dioxide vibrational mode in glassy poly(methyl methacrylate) but was activated for the chemically similar but rubbery poly(methyl acrylate). The vibrational dynamics are shown to have a direct correlation with the diffusivity of carbon dioxide through the polymer matrices.

Original language	English (US)
Pages (from-to)	8997-9004
Number of pages	8
Journal	Journal of Physical Chemistry B
Volume	125
Issue number	31
DOIs	https://doi.org/10.1021/acs.jpcb.1c04223
State	Published - Aug 12 2021

Bibliographical note

Funding Information:
Acknowledgment is made to the donors of The American Chemical Society Petroleum Research Fund for partial support of this research (56216-ND6). The authors gratefully acknowledge partial support from the National Science Foundation under CHE-1464416. C.G.P. was supported in part by a Newman and Lillian Bortnick Fellowship. I.C.S. was supported by a National Science Foundation Graduate Student Research Fellowship Grant no. 00039202. The authors thank Prof. Michael Fayer (Stanford University) for helpful discussions about orientational anisotropy measurements. C.G.P. thanks Colin Peterson for helpful advice on polymer systems with appropriate glass-transition temperatures.

Publisher Copyright:
© 2021 American Chemical Society.

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Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

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title = "Ultrafast Dynamics Experienced by Carbon Dioxide Diffusing through Polymer Matrices",

abstract = "Fourier transform infrared, pump-probe polarization anisotropy, and two-dimensional infrared spectroscopies were used to study the steady-state and time-dependent behavior of carbon dioxide dissolved in three different polymer systems. Gas reorientation dynamics in poly(methyl methacrylate), poly(methyl acrylate), and poly(dimethylsiloxane) were sensitive to the nature of chemical interactions between the gas and polymer, as well as whether the polymer was in a glassy or rubbery phase. The homogeneous dynamics experienced by the asymmetric stretching vibration were found to be fastest for rubbery polymers with weak, nonspecific gas-polymer interactions. Spectral diffusion was absent for the carbon dioxide vibrational mode in glassy poly(methyl methacrylate) but was activated for the chemically similar but rubbery poly(methyl acrylate). The vibrational dynamics are shown to have a direct correlation with the diffusivity of carbon dioxide through the polymer matrices. ",

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note = "Funding Information: Acknowledgment is made to the donors of The American Chemical Society Petroleum Research Fund for partial support of this research (56216-ND6). The authors gratefully acknowledge partial support from the National Science Foundation under CHE-1464416. C.G.P. was supported in part by a Newman and Lillian Bortnick Fellowship. I.C.S. was supported by a National Science Foundation Graduate Student Research Fellowship Grant no. 00039202. The authors thank Prof. Michael Fayer (Stanford University) for helpful discussions about orientational anisotropy measurements. C.G.P. thanks Colin Peterson for helpful advice on polymer systems with appropriate glass-transition temperatures. Publisher Copyright: {\textcopyright} 2021 American Chemical Society.",

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N1 - Funding Information: Acknowledgment is made to the donors of The American Chemical Society Petroleum Research Fund for partial support of this research (56216-ND6). The authors gratefully acknowledge partial support from the National Science Foundation under CHE-1464416. C.G.P. was supported in part by a Newman and Lillian Bortnick Fellowship. I.C.S. was supported by a National Science Foundation Graduate Student Research Fellowship Grant no. 00039202. The authors thank Prof. Michael Fayer (Stanford University) for helpful discussions about orientational anisotropy measurements. C.G.P. thanks Colin Peterson for helpful advice on polymer systems with appropriate glass-transition temperatures. Publisher Copyright: © 2021 American Chemical Society.

PY - 2021/8/12

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N2 - Fourier transform infrared, pump-probe polarization anisotropy, and two-dimensional infrared spectroscopies were used to study the steady-state and time-dependent behavior of carbon dioxide dissolved in three different polymer systems. Gas reorientation dynamics in poly(methyl methacrylate), poly(methyl acrylate), and poly(dimethylsiloxane) were sensitive to the nature of chemical interactions between the gas and polymer, as well as whether the polymer was in a glassy or rubbery phase. The homogeneous dynamics experienced by the asymmetric stretching vibration were found to be fastest for rubbery polymers with weak, nonspecific gas-polymer interactions. Spectral diffusion was absent for the carbon dioxide vibrational mode in glassy poly(methyl methacrylate) but was activated for the chemically similar but rubbery poly(methyl acrylate). The vibrational dynamics are shown to have a direct correlation with the diffusivity of carbon dioxide through the polymer matrices.

AB - Fourier transform infrared, pump-probe polarization anisotropy, and two-dimensional infrared spectroscopies were used to study the steady-state and time-dependent behavior of carbon dioxide dissolved in three different polymer systems. Gas reorientation dynamics in poly(methyl methacrylate), poly(methyl acrylate), and poly(dimethylsiloxane) were sensitive to the nature of chemical interactions between the gas and polymer, as well as whether the polymer was in a glassy or rubbery phase. The homogeneous dynamics experienced by the asymmetric stretching vibration were found to be fastest for rubbery polymers with weak, nonspecific gas-polymer interactions. Spectral diffusion was absent for the carbon dioxide vibrational mode in glassy poly(methyl methacrylate) but was activated for the chemically similar but rubbery poly(methyl acrylate). The vibrational dynamics are shown to have a direct correlation with the diffusivity of carbon dioxide through the polymer matrices.

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Ultrafast Dynamics Experienced by Carbon Dioxide Diffusing through Polymer Matrices

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