Dynamics of a bioinert polymer in hydrated states by dielectric relaxation spectroscopy

Toyoaki Hirata, Hisao Matsuno, Daisuke Kawaguchi, Manabu Inutsuka, Tomoyasu Hirai, Masaru Tanaka, Keiji Tanaka

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

The chain dynamics of well-defined poly(2-methoxyethyl acrylate) (PMEA), which has been used in practice as a bioinert coating for heart-lung machines, was examined as a function of water content by dielectric relaxation spectroscopy (DRS). Two relaxation processes observed in both dried and hydrated films were assigned to the segmental motion (α-process) and the relatively smaller scale motion such as the hindered rotation of side chains (β-process). Water molecules adsorbed on PMEA made the α-process faster, meaning that water molecules in PMEA played the role of a plasticizer. Combining the above knowledge with the depth dependence of water content in the PMEA film previously obtained by neutron reflectivity, the segmental dynamics of PMEA at the water interface, which should be crucial to bio-inertness, is discussed. We found that the segmental motion was markedly faster than that in the bulk and almost comparable to the side chain motion.

元の言語英語
ページ(範囲)1389-1394
ページ数6
ジャーナルPhysical Chemistry Chemical Physics
19
発行部数2
DOI
出版物ステータス出版済み - 2017

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Dielectric relaxation
acrylates
Polymers
Spectroscopy
polymers
spectroscopy
Water content
moisture content
Water
water
Plasticizers
Molecules
plasticizers
Relaxation processes
lungs
molecules
Neutrons
acrylic acid
reflectance
coatings

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

これを引用

Dynamics of a bioinert polymer in hydrated states by dielectric relaxation spectroscopy. / Hirata, Toyoaki; Matsuno, Hisao; Kawaguchi, Daisuke; Inutsuka, Manabu; Hirai, Tomoyasu; Tanaka, Masaru; Tanaka, Keiji.

:: Physical Chemistry Chemical Physics, 巻 19, 番号 2, 2017, p. 1389-1394.

研究成果: ジャーナルへの寄稿記事

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AU - Hirata, Toyoaki

AU - Matsuno, Hisao

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AU - Hirai, Tomoyasu

AU - Tanaka, Masaru

AU - Tanaka, Keiji

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N2 - The chain dynamics of well-defined poly(2-methoxyethyl acrylate) (PMEA), which has been used in practice as a bioinert coating for heart-lung machines, was examined as a function of water content by dielectric relaxation spectroscopy (DRS). Two relaxation processes observed in both dried and hydrated films were assigned to the segmental motion (α-process) and the relatively smaller scale motion such as the hindered rotation of side chains (β-process). Water molecules adsorbed on PMEA made the α-process faster, meaning that water molecules in PMEA played the role of a plasticizer. Combining the above knowledge with the depth dependence of water content in the PMEA film previously obtained by neutron reflectivity, the segmental dynamics of PMEA at the water interface, which should be crucial to bio-inertness, is discussed. We found that the segmental motion was markedly faster than that in the bulk and almost comparable to the side chain motion.

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