Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films

Kyoung Il Jo; Younghoon Oh; Tae Ho Kim; Joona Bang; Guangcui Yuan; Sushil K. Satija; Bong June Sung; Jaseung Koo

doi:10.1021/acsmacrolett.0c00608

Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films

Kyoung Il Jo, Younghoon Oh, Tae Ho Kim, Joona Bang, Guangcui Yuan, Sushil K. Satija, Bong June Sung, Jaseung Koo

Department of Chemical and Biological Engineering

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

3 Citations (Scopus)

Abstract

The morphological structure and dynamics of confined polymers adjacent to the polymer-polymer interface have a profound effect on determining the overall physical properties of polymer blends. We measured the diffusion dynamics of poly(methyl methacrylate) (PMMA) melts confined between polystyrene (PS) layers using neutron reflectivity. Combinations of various thicknesses of PMMA and deuterated PMMA (dPMMA) allowed us to experimentally reveal the nonmonotonic behavior of polymer mobility near the PS-PMMA interface. From the neutron reflectivity results, we found that the polymers adjacent to the immiscible polymer-polymer interface showed enhanced diffusion dynamics because of the repulsive interaction between PS and PMMA, whereas the polymer at local regions farther from the interface exhibited reduced dynamics. This is probably due to the nonspherical conformation of PMMA and spatial confinement near the PS-PMMA interface.

Original language	English
Pages (from-to)	1483-1488
Number of pages	6
Journal	ACS Macro Letters
Volume	9
Issue number	10
DOIs	https://doi.org/10.1021/acsmacrolett.0c00608
Publication status	Published - 2020 Oct 20

ASJC Scopus subject areas

Organic Chemistry
Polymers and Plastics
Inorganic Chemistry
Materials Chemistry

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10.1021/acsmacrolett.0c00608

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title = "Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films",

abstract = "The morphological structure and dynamics of confined polymers adjacent to the polymer-polymer interface have a profound effect on determining the overall physical properties of polymer blends. We measured the diffusion dynamics of poly(methyl methacrylate) (PMMA) melts confined between polystyrene (PS) layers using neutron reflectivity. Combinations of various thicknesses of PMMA and deuterated PMMA (dPMMA) allowed us to experimentally reveal the nonmonotonic behavior of polymer mobility near the PS-PMMA interface. From the neutron reflectivity results, we found that the polymers adjacent to the immiscible polymer-polymer interface showed enhanced diffusion dynamics because of the repulsive interaction between PS and PMMA, whereas the polymer at local regions farther from the interface exhibited reduced dynamics. This is probably due to the nonspherical conformation of PMMA and spatial confinement near the PS-PMMA interface. ",

author = "Jo, {Kyoung Il} and Younghoon Oh and Kim, {Tae Ho} and Joona Bang and Guangcui Yuan and Satija, {Sushil K.} and Sung, {Bong June} and Jaseung Koo",

note = "Funding Information: This work was supported by a grant from the National Research Foundation of Korea under Contract 2019R1F1A1059109 and Korea Technology and Information Promotion Agency for SMEs under G21S284165801 Publisher Copyright: {\textcopyright} ",

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T1 - Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films

AU - Jo, Kyoung Il

AU - Oh, Younghoon

AU - Kim, Tae Ho

AU - Bang, Joona

AU - Yuan, Guangcui

AU - Satija, Sushil K.

AU - Sung, Bong June

AU - Koo, Jaseung

N1 - Funding Information: This work was supported by a grant from the National Research Foundation of Korea under Contract 2019R1F1A1059109 and Korea Technology and Information Promotion Agency for SMEs under G21S284165801 Publisher Copyright: ©

PY - 2020/10/20

Y1 - 2020/10/20

N2 - The morphological structure and dynamics of confined polymers adjacent to the polymer-polymer interface have a profound effect on determining the overall physical properties of polymer blends. We measured the diffusion dynamics of poly(methyl methacrylate) (PMMA) melts confined between polystyrene (PS) layers using neutron reflectivity. Combinations of various thicknesses of PMMA and deuterated PMMA (dPMMA) allowed us to experimentally reveal the nonmonotonic behavior of polymer mobility near the PS-PMMA interface. From the neutron reflectivity results, we found that the polymers adjacent to the immiscible polymer-polymer interface showed enhanced diffusion dynamics because of the repulsive interaction between PS and PMMA, whereas the polymer at local regions farther from the interface exhibited reduced dynamics. This is probably due to the nonspherical conformation of PMMA and spatial confinement near the PS-PMMA interface.

AB - The morphological structure and dynamics of confined polymers adjacent to the polymer-polymer interface have a profound effect on determining the overall physical properties of polymer blends. We measured the diffusion dynamics of poly(methyl methacrylate) (PMMA) melts confined between polystyrene (PS) layers using neutron reflectivity. Combinations of various thicknesses of PMMA and deuterated PMMA (dPMMA) allowed us to experimentally reveal the nonmonotonic behavior of polymer mobility near the PS-PMMA interface. From the neutron reflectivity results, we found that the polymers adjacent to the immiscible polymer-polymer interface showed enhanced diffusion dynamics because of the repulsive interaction between PS and PMMA, whereas the polymer at local regions farther from the interface exhibited reduced dynamics. This is probably due to the nonspherical conformation of PMMA and spatial confinement near the PS-PMMA interface.

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Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films

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ASJC Scopus subject areas

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